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godot/modules/gdscript/gdscript_parser.cpp

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/*************************************************************************/
/* gdscript_parser.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gdscript_parser.h"
#include "core/core_string_names.h"
#include "core/engine.h"
#include "core/io/resource_loader.h"
#include "core/os/file_access.h"
#include "core/print_string.h"
#include "core/project_settings.h"
#include "core/reference.h"
#include "core/script_language.h"
#include "gdscript.h"
template <class T>
T *GDScriptParser::alloc_node() {
T *t = memnew(T);
t->next = list;
list = t;
if (!head)
head = t;
t->line = tokenizer->get_token_line();
t->column = tokenizer->get_token_column();
return t;
}
#ifdef DEBUG_ENABLED
static String _find_function_name(const GDScriptParser::OperatorNode *p_call);
#endif // DEBUG_ENABLED
bool GDScriptParser::_end_statement() {
if (tokenizer->get_token() == GDScriptTokenizer::TK_SEMICOLON) {
tokenizer->advance();
return true; //handle next
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE || tokenizer->get_token() == GDScriptTokenizer::TK_EOF) {
return true; //will be handled properly
}
return false;
}
bool GDScriptParser::_enter_indent_block(BlockNode *p_block) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_COLON) {
// report location at the previous token (on the previous line)
int error_line = tokenizer->get_token_line(-1);
int error_column = tokenizer->get_token_column(-1);
_set_error("':' expected at end of line.", error_line, error_column);
return false;
}
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_EOF) {
return false;
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_NEWLINE) {
// be more python-like
int current = tab_level.back()->get();
tab_level.push_back(current);
return true;
//_set_error("newline expected after ':'.");
//return false;
}
while (true) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_NEWLINE) {
return false; //wtf
} else if (tokenizer->get_token(1) == GDScriptTokenizer::TK_EOF) {
return false;
} else if (tokenizer->get_token(1) != GDScriptTokenizer::TK_NEWLINE) {
int indent = tokenizer->get_token_line_indent();
int current = tab_level.back()->get();
if (indent <= current) {
return false;
}
tab_level.push_back(indent);
tokenizer->advance();
return true;
} else if (p_block) {
NewLineNode *nl = alloc_node<NewLineNode>();
nl->line = tokenizer->get_token_line();
p_block->statements.push_back(nl);
}
tokenizer->advance(); // go to next newline
}
}
bool GDScriptParser::_parse_arguments(Node *p_parent, Vector<Node *> &p_args, bool p_static, bool p_can_codecomplete) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
tokenizer->advance();
} else {
parenthesis++;
int argidx = 0;
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
_make_completable_call(argidx);
completion_node = p_parent;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT && tokenizer->get_token_constant().get_type() == Variant::STRING && tokenizer->get_token(1) == GDScriptTokenizer::TK_CURSOR) {
//completing a string argument..
completion_cursor = tokenizer->get_token_constant();
_make_completable_call(argidx);
completion_node = p_parent;
tokenizer->advance(1);
return false;
}
Node *arg = _parse_expression(p_parent, p_static);
if (!arg) {
return false;
}
p_args.push_back(arg);
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
tokenizer->advance();
break;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
if (tokenizer->get_token(1) == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expression expected");
return false;
}
tokenizer->advance();
argidx++;
} else {
// something is broken
_set_error("Expected ',' or ')'");
return false;
}
}
parenthesis--;
}
return true;
}
void GDScriptParser::_make_completable_call(int p_arg) {
completion_cursor = StringName();
completion_type = COMPLETION_CALL_ARGUMENTS;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_argument = p_arg;
completion_block = current_block;
completion_found = true;
tokenizer->advance();
}
bool GDScriptParser::_get_completable_identifier(CompletionType p_type, StringName &identifier) {
identifier = StringName();
if (tokenizer->is_token_literal()) {
identifier = tokenizer->get_token_literal();
tokenizer->advance();
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
completion_cursor = identifier;
completion_type = p_type;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_block = current_block;
completion_found = true;
completion_ident_is_call = false;
tokenizer->advance();
if (tokenizer->is_token_literal()) {
identifier = identifier.operator String() + tokenizer->get_token_literal().operator String();
tokenizer->advance();
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
completion_ident_is_call = true;
}
return true;
}
return false;
}
GDScriptParser::Node *GDScriptParser::_parse_expression(Node *p_parent, bool p_static, bool p_allow_assign, bool p_parsing_constant) {
//Vector<Node*> expressions;
//Vector<OperatorNode::Operator> operators;
Vector<Expression> expression;
Node *expr = NULL;
int op_line = tokenizer->get_token_line(); // when operators are created at the bottom, the line might have been changed (\n found)
while (true) {
/*****************/
/* Parse Operand */
/*****************/
if (parenthesis > 0) {
//remove empty space (only allowed if inside parenthesis
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
}
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
//subexpression ()
tokenizer->advance();
parenthesis++;
Node *subexpr = _parse_expression(p_parent, p_static, p_allow_assign, p_parsing_constant);
parenthesis--;
if (!subexpr)
return NULL;
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' in expression");
return NULL;
}
tokenizer->advance();
expr = subexpr;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_DOLLAR) {
tokenizer->advance();
String path;
bool need_identifier = true;
bool done = false;
int line = tokenizer->get_token_line();
while (!done) {
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_CURSOR: {
completion_cursor = StringName();
completion_type = COMPLETION_GET_NODE;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_cursor = path;
completion_argument = 0;
completion_block = current_block;
completion_found = true;
tokenizer->advance();
} break;
case GDScriptTokenizer::TK_CONSTANT: {
if (!need_identifier) {
done = true;
break;
}
if (tokenizer->get_token_constant().get_type() != Variant::STRING) {
_set_error("Expected string constant or identifier after '$' or '/'.");
return NULL;
}
path += String(tokenizer->get_token_constant());
tokenizer->advance();
need_identifier = false;
} break;
case GDScriptTokenizer::TK_OP_DIV: {
if (need_identifier) {
done = true;
break;
}
path += "/";
tokenizer->advance();
need_identifier = true;
} break;
default: {
// Instead of checking for TK_IDENTIFIER, we check with is_token_literal, as this allows us to use match/sync/etc. as a name
if (need_identifier && tokenizer->is_token_literal()) {
path += String(tokenizer->get_token_literal());
tokenizer->advance();
need_identifier = false;
} else {
done = true;
}
break;
}
}
}
if (path == "") {
_set_error("Path expected after $.");
return NULL;
}
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_CALL;
op->line = line;
op->arguments.push_back(alloc_node<SelfNode>());
op->arguments[0]->line = line;
IdentifierNode *funcname = alloc_node<IdentifierNode>();
funcname->name = "get_node";
funcname->line = line;
op->arguments.push_back(funcname);
ConstantNode *nodepath = alloc_node<ConstantNode>();
nodepath->value = NodePath(StringName(path));
nodepath->datatype = _type_from_variant(nodepath->value);
nodepath->line = line;
op->arguments.push_back(nodepath);
expr = op;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
tokenizer->advance();
continue; //no point in cursor in the middle of expression
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT) {
//constant defined by tokenizer
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = tokenizer->get_token_constant();
constant->datatype = _type_from_variant(constant->value);
tokenizer->advance();
expr = constant;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONST_PI) {
//constant defined by tokenizer
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = Math_PI;
constant->datatype = _type_from_variant(constant->value);
tokenizer->advance();
expr = constant;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONST_TAU) {
//constant defined by tokenizer
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = Math_TAU;
constant->datatype = _type_from_variant(constant->value);
tokenizer->advance();
expr = constant;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONST_INF) {
//constant defined by tokenizer
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = Math_INF;
constant->datatype = _type_from_variant(constant->value);
tokenizer->advance();
expr = constant;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONST_NAN) {
//constant defined by tokenizer
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = Math_NAN;
constant->datatype = _type_from_variant(constant->value);
tokenizer->advance();
expr = constant;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_PRELOAD) {
//constant defined by tokenizer
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
_set_error("Expected '(' after 'preload'");
return NULL;
}
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
completion_cursor = StringName();
completion_node = p_parent;
completion_type = COMPLETION_RESOURCE_PATH;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_block = current_block;
completion_argument = 0;
completion_found = true;
tokenizer->advance();
}
String path;
bool found_constant = false;
bool valid = false;
ConstantNode *cn;
Node *subexpr = _parse_and_reduce_expression(p_parent, p_static);
if (subexpr) {
if (subexpr->type == Node::TYPE_CONSTANT) {
cn = static_cast<ConstantNode *>(subexpr);
found_constant = true;
}
if (subexpr->type == Node::TYPE_IDENTIFIER) {
IdentifierNode *in = static_cast<IdentifierNode *>(subexpr);
// Try to find the constant expression by the identifier
if (current_class->constant_expressions.has(in->name)) {
Node *cn_exp = current_class->constant_expressions[in->name].expression;
if (cn_exp->type == Node::TYPE_CONSTANT) {
cn = static_cast<ConstantNode *>(cn_exp);
found_constant = true;
}
}
}
if (found_constant && cn->value.get_type() == Variant::STRING) {
valid = true;
path = (String)cn->value;
}
}
if (!valid) {
_set_error("expected string constant as 'preload' argument.");
return NULL;
}
if (!path.is_abs_path() && base_path != "")
path = base_path + "/" + path;
path = path.replace("///", "//").simplify_path();
if (path == self_path) {
_set_error("Can't preload itself (use 'get_script()').");
return NULL;
}
Ref<Resource> res;
if (!validating) {
//this can be too slow for just validating code
if (for_completion && ScriptCodeCompletionCache::get_singleton() && FileAccess::exists(path)) {
res = ScriptCodeCompletionCache::get_singleton()->get_cached_resource(path);
} else if (!for_completion || FileAccess::exists(path)) {
res = ResourceLoader::load(path);
}
} else {
if (!FileAccess::exists(path)) {
_set_error("Can't preload resource at path: " + path);
return NULL;
} else if (ScriptCodeCompletionCache::get_singleton()) {
res = ScriptCodeCompletionCache::get_singleton()->get_cached_resource(path);
}
}
if (!res.is_valid()) {
_set_error("Can't preload resource at path: " + path);
return NULL;
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' after 'preload' path");
return NULL;
}
Ref<GDScript> gds = res;
if (gds.is_valid() && !gds->is_valid()) {
_set_error("Could not fully preload the script, possible cyclic reference or compilation error.");
return NULL;
}
tokenizer->advance();
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = res;
constant->datatype = _type_from_variant(constant->value);
expr = constant;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_YIELD) {
if (!current_function) {
_set_error("yield() can only be used inside function blocks.");
return NULL;
}
current_function->has_yield = true;
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
_set_error("Expected '(' after 'yield'");
return NULL;
}
tokenizer->advance();
OperatorNode *yield = alloc_node<OperatorNode>();
yield->op = OperatorNode::OP_YIELD;
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
expr = yield;
tokenizer->advance();
} else {
parenthesis++;
Node *object = _parse_and_reduce_expression(p_parent, p_static);
if (!object)
return NULL;
yield->arguments.push_back(object);
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
_set_error("Expected ',' after first argument of 'yield'");
return NULL;
}
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
completion_cursor = StringName();
completion_node = object;
completion_type = COMPLETION_YIELD;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_argument = 0;
completion_block = current_block;
completion_found = true;
tokenizer->advance();
}
Node *signal = _parse_and_reduce_expression(p_parent, p_static);
if (!signal)
return NULL;
yield->arguments.push_back(signal);
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' after second argument of 'yield'");
return NULL;
}
parenthesis--;
tokenizer->advance();
expr = yield;
}
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_SELF) {
if (p_static) {
_set_error("'self'' not allowed in static function or constant expression");
return NULL;
}
//constant defined by tokenizer
SelfNode *self = alloc_node<SelfNode>();
tokenizer->advance();
expr = self;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_TYPE && tokenizer->get_token(1) == GDScriptTokenizer::TK_PERIOD) {
Variant::Type bi_type = tokenizer->get_token_type();
tokenizer->advance(2);
StringName identifier;
if (_get_completable_identifier(COMPLETION_BUILT_IN_TYPE_CONSTANT, identifier)) {
completion_built_in_constant = bi_type;
}
if (identifier == StringName()) {
_set_error("Built-in type constant or static function expected after '.'");
return NULL;
}
if (!Variant::has_constant(bi_type, identifier)) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_OPEN &&
Variant::is_method_const(bi_type, identifier) &&
Variant::get_method_return_type(bi_type, identifier) == bi_type) {
tokenizer->advance();
OperatorNode *construct = alloc_node<OperatorNode>();
construct->op = OperatorNode::OP_CALL;
TypeNode *tn = alloc_node<TypeNode>();
tn->vtype = bi_type;
construct->arguments.push_back(tn);
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_CALL;
op->arguments.push_back(construct);
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = identifier;
op->arguments.push_back(id);
if (!_parse_arguments(op, op->arguments, p_static, true))
return NULL;
expr = op;
} else {
// Object is a special case
bool valid = false;
if (bi_type == Variant::OBJECT) {
int object_constant = ClassDB::get_integer_constant("Object", identifier, &valid);
if (valid) {
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = object_constant;
cn->datatype = _type_from_variant(cn->value);
expr = cn;
}
}
if (!valid) {
_set_error("Static constant '" + identifier.operator String() + "' not present in built-in type " + Variant::get_type_name(bi_type) + ".");
return NULL;
}
}
} else {
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = Variant::get_constant_value(bi_type, identifier);
cn->datatype = _type_from_variant(cn->value);
expr = cn;
}
} else if (tokenizer->get_token(1) == GDScriptTokenizer::TK_PARENTHESIS_OPEN && tokenizer->is_token_literal()) {
// We check with is_token_literal, as this allows us to use match/sync/etc. as a name
//function or constructor
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_CALL;
//Do a quick Array and Dictionary Check. Replace if either require no arguments.
bool replaced = false;
if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_TYPE) {
Variant::Type ct = tokenizer->get_token_type();
if (!p_parsing_constant) {
if (ct == Variant::ARRAY) {
if (tokenizer->get_token(2) == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
ArrayNode *arr = alloc_node<ArrayNode>();
expr = arr;
replaced = true;
tokenizer->advance(3);
}
}
if (ct == Variant::DICTIONARY) {
if (tokenizer->get_token(2) == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
DictionaryNode *dict = alloc_node<DictionaryNode>();
expr = dict;
replaced = true;
tokenizer->advance(3);
}
}
}
if (!replaced) {
TypeNode *tn = alloc_node<TypeNode>();
tn->vtype = tokenizer->get_token_type();
op->arguments.push_back(tn);
tokenizer->advance(2);
}
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_FUNC) {
BuiltInFunctionNode *bn = alloc_node<BuiltInFunctionNode>();
bn->function = tokenizer->get_token_built_in_func();
op->arguments.push_back(bn);
tokenizer->advance(2);
} else {
SelfNode *self = alloc_node<SelfNode>();
op->arguments.push_back(self);
StringName identifier;
if (_get_completable_identifier(COMPLETION_FUNCTION, identifier)) {
}
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = identifier;
op->arguments.push_back(id);
tokenizer->advance(1);
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
_make_completable_call(0);
completion_node = op;
}
if (!replaced) {
if (!_parse_arguments(op, op->arguments, p_static, true))
return NULL;
expr = op;
}
} else if (tokenizer->is_token_literal(0, true)) {
// We check with is_token_literal, as this allows us to use match/sync/etc. as a name
//identifier (reference)
const ClassNode *cln = current_class;
bool bfn = false;
StringName identifier;
int id_line = tokenizer->get_token_line();
if (_get_completable_identifier(COMPLETION_IDENTIFIER, identifier)) {
}
BlockNode *b = current_block;
while (!bfn && b) {
if (b->variables.has(identifier)) {
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = identifier;
id->declared_block = b;
id->line = id_line;
expr = id;
bfn = true;
#ifdef DEBUG_ENABLED
LocalVarNode *lv = b->variables[identifier];
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_OP_ASSIGN_ADD:
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_AND:
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_OR:
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_XOR:
case GDScriptTokenizer::TK_OP_ASSIGN_DIV:
case GDScriptTokenizer::TK_OP_ASSIGN_MOD:
case GDScriptTokenizer::TK_OP_ASSIGN_MUL:
case GDScriptTokenizer::TK_OP_ASSIGN_SHIFT_LEFT:
case GDScriptTokenizer::TK_OP_ASSIGN_SHIFT_RIGHT:
case GDScriptTokenizer::TK_OP_ASSIGN_SUB: {
if (lv->assignments == 0) {
if (!lv->datatype.has_type) {
_set_error("Using assignment with operation on a variable that was never assigned.");
return NULL;
}
_add_warning(GDScriptWarning::UNASSIGNED_VARIABLE_OP_ASSIGN, -1, identifier.operator String());
}
} // fallthrough
case GDScriptTokenizer::TK_OP_ASSIGN: {
lv->assignments += 1;
lv->usages--; // Assignment is not really usage
} break;
default: {
lv->usages++;
}
}
#endif // DEBUG_ENABLED
break;
}
b = b->parent_block;
}
if (!bfn && p_parsing_constant) {
if (cln->constant_expressions.has(identifier)) {
expr = cln->constant_expressions[identifier].expression;
bfn = true;
} else if (GDScriptLanguage::get_singleton()->get_global_map().has(identifier)) {
//check from constants
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = GDScriptLanguage::get_singleton()->get_global_array()[GDScriptLanguage::get_singleton()->get_global_map()[identifier]];
constant->datatype = _type_from_variant(constant->value);
constant->line = id_line;
expr = constant;
bfn = true;
}
if (!bfn && GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
//check from singletons
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = GDScriptLanguage::get_singleton()->get_named_globals_map()[identifier];
expr = constant;
bfn = true;
}
// Check parents for the constant
if (!bfn && cln->extends_file != StringName()) {
Ref<GDScript> parent = ResourceLoader::load(cln->extends_file);
if (parent.is_valid() && parent->is_valid()) {
Map<StringName, Variant> parent_constants;
parent->get_constants(&parent_constants);
if (parent_constants.has(identifier)) {
ConstantNode *constant = alloc_node<ConstantNode>();
constant->value = parent_constants[identifier];
expr = constant;
bfn = true;
}
}
}
}
if (!bfn) {
#ifdef DEBUG_ENABLED
if (current_function) {
int arg_idx = current_function->arguments.find(identifier);
if (arg_idx != -1) {
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_OP_ASSIGN_ADD:
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_AND:
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_OR:
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_XOR:
case GDScriptTokenizer::TK_OP_ASSIGN_DIV:
case GDScriptTokenizer::TK_OP_ASSIGN_MOD:
case GDScriptTokenizer::TK_OP_ASSIGN_MUL:
case GDScriptTokenizer::TK_OP_ASSIGN_SHIFT_LEFT:
case GDScriptTokenizer::TK_OP_ASSIGN_SHIFT_RIGHT:
case GDScriptTokenizer::TK_OP_ASSIGN_SUB:
case GDScriptTokenizer::TK_OP_ASSIGN: {
// Assignment is not really usage
current_function->arguments_usage.write[arg_idx] = current_function->arguments_usage[arg_idx] - 1;
} break;
default: {
current_function->arguments_usage.write[arg_idx] = current_function->arguments_usage[arg_idx] + 1;
}
}
}
}
#endif // DEBUG_ENABLED
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = identifier;
id->line = id_line;
expr = id;
}
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_ADD || tokenizer->get_token() == GDScriptTokenizer::TK_OP_SUB || tokenizer->get_token() == GDScriptTokenizer::TK_OP_NOT || tokenizer->get_token() == GDScriptTokenizer::TK_OP_BIT_INVERT) {
//single prefix operators like !expr +expr -expr ++expr --expr
alloc_node<OperatorNode>();
Expression e;
e.is_op = true;
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_OP_ADD: e.op = OperatorNode::OP_POS; break;
case GDScriptTokenizer::TK_OP_SUB: e.op = OperatorNode::OP_NEG; break;
case GDScriptTokenizer::TK_OP_NOT: e.op = OperatorNode::OP_NOT; break;
case GDScriptTokenizer::TK_OP_BIT_INVERT: e.op = OperatorNode::OP_BIT_INVERT; break;
default: {}
}
tokenizer->advance();
if (e.op != OperatorNode::OP_NOT && tokenizer->get_token() == GDScriptTokenizer::TK_OP_NOT) {
_set_error("Misplaced 'not'.");
return NULL;
}
expression.push_back(e);
continue; //only exception, must continue...
/*
Node *subexpr=_parse_expression(op,p_static);
if (!subexpr)
return NULL;
op->arguments.push_back(subexpr);
expr=op;*/
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_IS && tokenizer->get_token(1) == GDScriptTokenizer::TK_BUILT_IN_TYPE) {
// 'is' operator with built-in type
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_IS_BUILTIN;
op->arguments.push_back(expr);
tokenizer->advance();
TypeNode *tn = alloc_node<TypeNode>();
tn->vtype = tokenizer->get_token_type();
op->arguments.push_back(tn);
tokenizer->advance();
expr = op;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BRACKET_OPEN) {
// array
tokenizer->advance();
ArrayNode *arr = alloc_node<ArrayNode>();
bool expecting_comma = false;
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_EOF) {
_set_error("Unterminated array");
return NULL;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BRACKET_CLOSE) {
tokenizer->advance();
break;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance(); //ignore newline
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
if (!expecting_comma) {
_set_error("expression or ']' expected");
return NULL;
}
expecting_comma = false;
tokenizer->advance(); //ignore newline
} else {
//parse expression
if (expecting_comma) {
_set_error("',' or ']' expected");
return NULL;
}
Node *n = _parse_expression(arr, p_static, p_allow_assign, p_parsing_constant);
if (!n)
return NULL;
arr->elements.push_back(n);
expecting_comma = true;
}
}
expr = arr;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CURLY_BRACKET_OPEN) {
// array
tokenizer->advance();
DictionaryNode *dict = alloc_node<DictionaryNode>();
enum DictExpect {
DICT_EXPECT_KEY,
DICT_EXPECT_COLON,
DICT_EXPECT_VALUE,
DICT_EXPECT_COMMA
};
Node *key = NULL;
Set<Variant> keys;
DictExpect expecting = DICT_EXPECT_KEY;
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_EOF) {
_set_error("Unterminated dictionary");
return NULL;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CURLY_BRACKET_CLOSE) {
if (expecting == DICT_EXPECT_COLON) {
_set_error("':' expected");
return NULL;
}
if (expecting == DICT_EXPECT_VALUE) {
_set_error("value expected");
return NULL;
}
tokenizer->advance();
break;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance(); //ignore newline
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
if (expecting == DICT_EXPECT_KEY) {
_set_error("key or '}' expected");
return NULL;
}
if (expecting == DICT_EXPECT_VALUE) {
_set_error("value expected");
return NULL;
}
if (expecting == DICT_EXPECT_COLON) {
_set_error("':' expected");
return NULL;
}
expecting = DICT_EXPECT_KEY;
tokenizer->advance(); //ignore newline
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_COLON) {
if (expecting == DICT_EXPECT_KEY) {
_set_error("key or '}' expected");
return NULL;
}
if (expecting == DICT_EXPECT_VALUE) {
_set_error("value expected");
return NULL;
}
if (expecting == DICT_EXPECT_COMMA) {
_set_error("',' or '}' expected");
return NULL;
}
expecting = DICT_EXPECT_VALUE;
tokenizer->advance(); //ignore newline
} else {
if (expecting == DICT_EXPECT_COMMA) {
_set_error("',' or '}' expected");
return NULL;
}
if (expecting == DICT_EXPECT_COLON) {
_set_error("':' expected");
return NULL;
}
if (expecting == DICT_EXPECT_KEY) {
if (tokenizer->is_token_literal() && tokenizer->get_token(1) == GDScriptTokenizer::TK_OP_ASSIGN) {
// We check with is_token_literal, as this allows us to use match/sync/etc. as a name
//lua style identifier, easier to write
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = tokenizer->get_token_literal();
cn->datatype = _type_from_variant(cn->value);
key = cn;
tokenizer->advance(2);
expecting = DICT_EXPECT_VALUE;
} else {
//python/js style more flexible
key = _parse_expression(dict, p_static, p_allow_assign, p_parsing_constant);
if (!key)
return NULL;
expecting = DICT_EXPECT_COLON;
}
}
if (expecting == DICT_EXPECT_VALUE) {
Node *value = _parse_expression(dict, p_static, p_allow_assign, p_parsing_constant);
if (!value)
return NULL;
expecting = DICT_EXPECT_COMMA;
if (key->type == GDScriptParser::Node::TYPE_CONSTANT) {
Variant const &keyName = static_cast<const GDScriptParser::ConstantNode *>(key)->value;
if (keys.has(keyName)) {
_set_error("Duplicate key found in Dictionary literal");
return NULL;
}
keys.insert(keyName);
}
DictionaryNode::Pair pair;
pair.key = key;
pair.value = value;
dict->elements.push_back(pair);
key = NULL;
}
}
}
expr = dict;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_PERIOD && (tokenizer->is_token_literal(1) || tokenizer->get_token(1) == GDScriptTokenizer::TK_CURSOR)) {
// We check with is_token_literal, as this allows us to use match/sync/etc. as a name
// parent call
tokenizer->advance(); //goto identifier
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_PARENT_CALL;
/*SelfNode *self = alloc_node<SelfNode>();
op->arguments.push_back(self);
forbidden for now */
StringName identifier;
bool is_completion = _get_completable_identifier(COMPLETION_PARENT_FUNCTION, identifier) && for_completion;
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = identifier;
op->arguments.push_back(id);
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
if (!is_completion) {
_set_error("Expected '(' for parent function call.");
return NULL;
}
} else {
tokenizer->advance();
if (!_parse_arguments(op, op->arguments, p_static)) {
return NULL;
}
}
expr = op;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_TYPE && expression.size() > 0 && expression[expression.size() - 1].is_op && expression[expression.size() - 1].op == OperatorNode::OP_IS) {
Expression e = expression[expression.size() - 1];
e.op = OperatorNode::OP_IS_BUILTIN;
expression.write[expression.size() - 1] = e;
TypeNode *tn = alloc_node<TypeNode>();
tn->vtype = tokenizer->get_token_type();
expr = tn;
tokenizer->advance();
} else {
//find list [ or find dictionary {
_set_error("Error parsing expression, misplaced: " + String(tokenizer->get_token_name(tokenizer->get_token())));
return NULL; //nothing
}
if (!expr) {
ERR_EXPLAIN("GDScriptParser bug, couldn't figure out what expression is...");
ERR_FAIL_COND_V(!expr, NULL);
}
/******************/
/* Parse Indexing */
/******************/
while (true) {
//expressions can be indexed any number of times
if (tokenizer->get_token() == GDScriptTokenizer::TK_PERIOD) {
//indexing using "."
if (tokenizer->get_token(1) != GDScriptTokenizer::TK_CURSOR && !tokenizer->is_token_literal(1)) {
// We check with is_token_literal, as this allows us to use match/sync/etc. as a name
_set_error("Expected identifier as member");
return NULL;
} else if (tokenizer->get_token(2) == GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
//call!!
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_CALL;
tokenizer->advance();
IdentifierNode *id = alloc_node<IdentifierNode>();
if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_FUNC) {
//small hack so built in funcs don't obfuscate methods
id->name = GDScriptFunctions::get_func_name(tokenizer->get_token_built_in_func());
tokenizer->advance();
} else {
StringName identifier;
if (_get_completable_identifier(COMPLETION_METHOD, identifier)) {
completion_node = op;
//indexing stuff
}
id->name = identifier;
}
op->arguments.push_back(expr); // call what
op->arguments.push_back(id); // call func
//get arguments
tokenizer->advance(1);
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
_make_completable_call(0);
completion_node = op;
}
if (!_parse_arguments(op, op->arguments, p_static, true))
return NULL;
expr = op;
} else {
//simple indexing!
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_INDEX_NAMED;
tokenizer->advance();
StringName identifier;
if (_get_completable_identifier(COMPLETION_INDEX, identifier)) {
if (identifier == StringName()) {
identifier = "@temp"; //so it parses allright
}
completion_node = op;
//indexing stuff
}
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = identifier;
op->arguments.push_back(expr);
op->arguments.push_back(id);
expr = op;
}
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BRACKET_OPEN) {
//indexing using "[]"
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_INDEX;
tokenizer->advance(1);
Node *subexpr = _parse_expression(op, p_static, p_allow_assign, p_parsing_constant);
if (!subexpr) {
return NULL;
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_BRACKET_CLOSE) {
_set_error("Expected ']'");
return NULL;
}
op->arguments.push_back(expr);
op->arguments.push_back(subexpr);
tokenizer->advance(1);
expr = op;
} else
break;
}
/*****************/
/* Parse Casting */
/*****************/
bool has_casting = expr->type == Node::TYPE_CAST;
if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_AS) {
if (has_casting) {
_set_error("Unexpected 'as'.");
return NULL;
}
CastNode *cn = alloc_node<CastNode>();
if (!_parse_type(cn->cast_type)) {
_set_error("Expected type after 'as'.");
return NULL;
}
has_casting = true;
cn->source_node = expr;
expr = cn;
}
/******************/
/* Parse Operator */
/******************/
if (parenthesis > 0) {
//remove empty space (only allowed if inside parenthesis
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
}
}
Expression e;
e.is_op = false;
e.node = expr;
expression.push_back(e);
// determine which operator is next
OperatorNode::Operator op;
bool valid = true;
//assign, if allowed is only allowed on the first operator
#define _VALIDATE_ASSIGN \
if (!p_allow_assign || has_casting) { \
_set_error("Unexpected assign."); \
return NULL; \
} \
p_allow_assign = false;
switch (tokenizer->get_token()) { //see operator
case GDScriptTokenizer::TK_OP_IN: op = OperatorNode::OP_IN; break;
case GDScriptTokenizer::TK_OP_EQUAL: op = OperatorNode::OP_EQUAL; break;
case GDScriptTokenizer::TK_OP_NOT_EQUAL: op = OperatorNode::OP_NOT_EQUAL; break;
case GDScriptTokenizer::TK_OP_LESS: op = OperatorNode::OP_LESS; break;
case GDScriptTokenizer::TK_OP_LESS_EQUAL: op = OperatorNode::OP_LESS_EQUAL; break;
case GDScriptTokenizer::TK_OP_GREATER: op = OperatorNode::OP_GREATER; break;
case GDScriptTokenizer::TK_OP_GREATER_EQUAL: op = OperatorNode::OP_GREATER_EQUAL; break;
case GDScriptTokenizer::TK_OP_AND: op = OperatorNode::OP_AND; break;
case GDScriptTokenizer::TK_OP_OR: op = OperatorNode::OP_OR; break;
case GDScriptTokenizer::TK_OP_ADD: op = OperatorNode::OP_ADD; break;
case GDScriptTokenizer::TK_OP_SUB: op = OperatorNode::OP_SUB; break;
case GDScriptTokenizer::TK_OP_MUL: op = OperatorNode::OP_MUL; break;
case GDScriptTokenizer::TK_OP_DIV: op = OperatorNode::OP_DIV; break;
case GDScriptTokenizer::TK_OP_MOD:
op = OperatorNode::OP_MOD;
break;
//case GDScriptTokenizer::TK_OP_NEG: op=OperatorNode::OP_NEG ; break;
case GDScriptTokenizer::TK_OP_SHIFT_LEFT: op = OperatorNode::OP_SHIFT_LEFT; break;
case GDScriptTokenizer::TK_OP_SHIFT_RIGHT: op = OperatorNode::OP_SHIFT_RIGHT; break;
case GDScriptTokenizer::TK_OP_ASSIGN: {
_VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN;
if (tokenizer->get_token(1) == GDScriptTokenizer::TK_CURSOR) {
//code complete assignment
completion_type = COMPLETION_ASSIGN;
completion_node = expr;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_block = current_block;
completion_found = true;
tokenizer->advance();
}
} break;
case GDScriptTokenizer::TK_OP_ASSIGN_ADD: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_ADD; break;
case GDScriptTokenizer::TK_OP_ASSIGN_SUB: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_SUB; break;
case GDScriptTokenizer::TK_OP_ASSIGN_MUL: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_MUL; break;
case GDScriptTokenizer::TK_OP_ASSIGN_DIV: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_DIV; break;
case GDScriptTokenizer::TK_OP_ASSIGN_MOD: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_MOD; break;
case GDScriptTokenizer::TK_OP_ASSIGN_SHIFT_LEFT: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_SHIFT_LEFT; break;
case GDScriptTokenizer::TK_OP_ASSIGN_SHIFT_RIGHT: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_SHIFT_RIGHT; break;
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_AND: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_BIT_AND; break;
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_OR: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_BIT_OR; break;
case GDScriptTokenizer::TK_OP_ASSIGN_BIT_XOR: _VALIDATE_ASSIGN op = OperatorNode::OP_ASSIGN_BIT_XOR; break;
case GDScriptTokenizer::TK_OP_BIT_AND: op = OperatorNode::OP_BIT_AND; break;
case GDScriptTokenizer::TK_OP_BIT_OR: op = OperatorNode::OP_BIT_OR; break;
case GDScriptTokenizer::TK_OP_BIT_XOR: op = OperatorNode::OP_BIT_XOR; break;
case GDScriptTokenizer::TK_PR_IS: op = OperatorNode::OP_IS; break;
case GDScriptTokenizer::TK_CF_IF: op = OperatorNode::OP_TERNARY_IF; break;
case GDScriptTokenizer::TK_CF_ELSE: op = OperatorNode::OP_TERNARY_ELSE; break;
default: valid = false; break;
}
if (valid) {
e.is_op = true;
e.op = op;
expression.push_back(e);
tokenizer->advance();
} else {
break;
}
}
/* Reduce the set set of expressions and place them in an operator tree, respecting precedence */
while (expression.size() > 1) {
int next_op = -1;
int min_priority = 0xFFFFF;
bool is_unary = false;
bool is_ternary = false;
for (int i = 0; i < expression.size(); i++) {
if (!expression[i].is_op) {
continue;
}
int priority;
bool unary = false;
bool ternary = false;
bool error = false;
bool right_to_left = false;
switch (expression[i].op) {
case OperatorNode::OP_IS:
case OperatorNode::OP_IS_BUILTIN:
priority = -1;
break; //before anything
case OperatorNode::OP_BIT_INVERT:
priority = 0;
unary = true;
break;
case OperatorNode::OP_NEG:
priority = 1;
unary = true;
break;
case OperatorNode::OP_POS:
priority = 1;
unary = true;
break;
case OperatorNode::OP_MUL: priority = 2; break;
case OperatorNode::OP_DIV: priority = 2; break;
case OperatorNode::OP_MOD: priority = 2; break;
case OperatorNode::OP_ADD: priority = 3; break;
case OperatorNode::OP_SUB: priority = 3; break;
case OperatorNode::OP_SHIFT_LEFT: priority = 4; break;
case OperatorNode::OP_SHIFT_RIGHT: priority = 4; break;
case OperatorNode::OP_BIT_AND: priority = 5; break;
case OperatorNode::OP_BIT_XOR: priority = 6; break;
case OperatorNode::OP_BIT_OR: priority = 7; break;
case OperatorNode::OP_LESS: priority = 8; break;
case OperatorNode::OP_LESS_EQUAL: priority = 8; break;
case OperatorNode::OP_GREATER: priority = 8; break;
case OperatorNode::OP_GREATER_EQUAL: priority = 8; break;
case OperatorNode::OP_EQUAL: priority = 8; break;
case OperatorNode::OP_NOT_EQUAL: priority = 8; break;
case OperatorNode::OP_IN: priority = 10; break;
case OperatorNode::OP_NOT:
priority = 11;
unary = true;
break;
case OperatorNode::OP_AND: priority = 12; break;
case OperatorNode::OP_OR: priority = 13; break;
case OperatorNode::OP_TERNARY_IF:
priority = 14;
ternary = true;
right_to_left = true;
break;
case OperatorNode::OP_TERNARY_ELSE:
priority = 14;
error = true;
// Rigth-to-left should be false in this case, otherwise it would always error.
break;
case OperatorNode::OP_ASSIGN: priority = 15; break;
case OperatorNode::OP_ASSIGN_ADD: priority = 15; break;
case OperatorNode::OP_ASSIGN_SUB: priority = 15; break;
case OperatorNode::OP_ASSIGN_MUL: priority = 15; break;
case OperatorNode::OP_ASSIGN_DIV: priority = 15; break;
case OperatorNode::OP_ASSIGN_MOD: priority = 15; break;
case OperatorNode::OP_ASSIGN_SHIFT_LEFT: priority = 15; break;
case OperatorNode::OP_ASSIGN_SHIFT_RIGHT: priority = 15; break;
case OperatorNode::OP_ASSIGN_BIT_AND: priority = 15; break;
case OperatorNode::OP_ASSIGN_BIT_OR: priority = 15; break;
case OperatorNode::OP_ASSIGN_BIT_XOR: priority = 15; break;
default: {
_set_error("GDScriptParser bug, invalid operator in expression: " + itos(expression[i].op));
return NULL;
}
}
if (priority < min_priority || (right_to_left && priority == min_priority)) {
// < is used for left to right (default)
// <= is used for right to left
if (error) {
_set_error("Unexpected operator");
return NULL;
}
next_op = i;
min_priority = priority;
is_unary = unary;
is_ternary = ternary;
}
}
if (next_op == -1) {
_set_error("Yet another parser bug....");
ERR_FAIL_COND_V(next_op == -1, NULL);
}
// OK! create operator..
if (is_unary) {
int expr_pos = next_op;
while (expression[expr_pos].is_op) {
expr_pos++;
if (expr_pos == expression.size()) {
//can happen..
_set_error("Unexpected end of expression...");
return NULL;
}
}
//consecutively do unary opeators
for (int i = expr_pos - 1; i >= next_op; i--) {
OperatorNode *op = alloc_node<OperatorNode>();
op->op = expression[i].op;
op->arguments.push_back(expression[i + 1].node);
op->line = op_line; //line might have been changed from a \n
expression.write[i].is_op = false;
expression.write[i].node = op;
expression.remove(i + 1);
}
} else if (is_ternary) {
if (next_op < 1 || next_op >= (expression.size() - 1)) {
_set_error("Parser bug...");
ERR_FAIL_V(NULL);
}
if (next_op >= (expression.size() - 2) || expression[next_op + 2].op != OperatorNode::OP_TERNARY_ELSE) {
_set_error("Expected else after ternary if.");
return NULL;
}
if (next_op >= (expression.size() - 3)) {
_set_error("Expected value after ternary else.");
return NULL;
}
OperatorNode *op = alloc_node<OperatorNode>();
op->op = expression[next_op].op;
op->line = op_line; //line might have been changed from a \n
if (expression[next_op - 1].is_op) {
_set_error("Parser bug...");
ERR_FAIL_V(NULL);
}
if (expression[next_op + 1].is_op) {
// this is not invalid and can really appear
// but it becomes invalid anyway because no binary op
// can be followed by a unary op in a valid combination,
// due to how precedence works, unaries will always disappear first
_set_error("Unexpected two consecutive operators after ternary if.");
return NULL;
}
if (expression[next_op + 3].is_op) {
// this is not invalid and can really appear
// but it becomes invalid anyway because no binary op
// can be followed by a unary op in a valid combination,
// due to how precedence works, unaries will always disappear first
_set_error("Unexpected two consecutive operators after ternary else.");
return NULL;
}
op->arguments.push_back(expression[next_op + 1].node); //next expression goes as first
op->arguments.push_back(expression[next_op - 1].node); //left expression goes as when-true
op->arguments.push_back(expression[next_op + 3].node); //expression after next goes as when-false
//replace all 3 nodes by this operator and make it an expression
expression.write[next_op - 1].node = op;
expression.remove(next_op);
expression.remove(next_op);
expression.remove(next_op);
expression.remove(next_op);
} else {
if (next_op < 1 || next_op >= (expression.size() - 1)) {
_set_error("Parser bug...");
ERR_FAIL_V(NULL);
}
OperatorNode *op = alloc_node<OperatorNode>();
op->op = expression[next_op].op;
op->line = op_line; //line might have been changed from a \n
if (expression[next_op - 1].is_op) {
_set_error("Parser bug...");
ERR_FAIL_V(NULL);
}
if (expression[next_op + 1].is_op) {
// this is not invalid and can really appear
// but it becomes invalid anyway because no binary op
// can be followed by a unary op in a valid combination,
// due to how precedence works, unaries will always disappear first
_set_error("Unexpected two consecutive operators.");
return NULL;
}
op->arguments.push_back(expression[next_op - 1].node); //expression goes as left
op->arguments.push_back(expression[next_op + 1].node); //next expression goes as right
//replace all 3 nodes by this operator and make it an expression
expression.write[next_op - 1].node = op;
expression.remove(next_op);
expression.remove(next_op);
}
}
return expression[0].node;
}
GDScriptParser::Node *GDScriptParser::_reduce_expression(Node *p_node, bool p_to_const) {
switch (p_node->type) {
case Node::TYPE_BUILT_IN_FUNCTION: {
//many may probably be optimizable
return p_node;
} break;
case Node::TYPE_ARRAY: {
ArrayNode *an = static_cast<ArrayNode *>(p_node);
bool all_constants = true;
for (int i = 0; i < an->elements.size(); i++) {
an->elements.write[i] = _reduce_expression(an->elements[i], p_to_const);
if (an->elements[i]->type != Node::TYPE_CONSTANT)
all_constants = false;
}
if (all_constants && p_to_const) {
//reduce constant array expression
ConstantNode *cn = alloc_node<ConstantNode>();
Array arr;
arr.resize(an->elements.size());
for (int i = 0; i < an->elements.size(); i++) {
ConstantNode *acn = static_cast<ConstantNode *>(an->elements[i]);
arr[i] = acn->value;
}
cn->value = arr;
cn->datatype = _type_from_variant(cn->value);
return cn;
}
return an;
} break;
case Node::TYPE_DICTIONARY: {
DictionaryNode *dn = static_cast<DictionaryNode *>(p_node);
bool all_constants = true;
for (int i = 0; i < dn->elements.size(); i++) {
dn->elements.write[i].key = _reduce_expression(dn->elements[i].key, p_to_const);
if (dn->elements[i].key->type != Node::TYPE_CONSTANT)
all_constants = false;
dn->elements.write[i].value = _reduce_expression(dn->elements[i].value, p_to_const);
if (dn->elements[i].value->type != Node::TYPE_CONSTANT)
all_constants = false;
}
if (all_constants && p_to_const) {
//reduce constant array expression
ConstantNode *cn = alloc_node<ConstantNode>();
Dictionary dict;
for (int i = 0; i < dn->elements.size(); i++) {
ConstantNode *key_c = static_cast<ConstantNode *>(dn->elements[i].key);
ConstantNode *value_c = static_cast<ConstantNode *>(dn->elements[i].value);
dict[key_c->value] = value_c->value;
}
cn->value = dict;
cn->datatype = _type_from_variant(cn->value);
return cn;
}
return dn;
} break;
case Node::TYPE_OPERATOR: {
OperatorNode *op = static_cast<OperatorNode *>(p_node);
bool all_constants = true;
int last_not_constant = -1;
for (int i = 0; i < op->arguments.size(); i++) {
op->arguments.write[i] = _reduce_expression(op->arguments[i], p_to_const);
if (op->arguments[i]->type != Node::TYPE_CONSTANT) {
all_constants = false;
last_not_constant = i;
}
}
if (op->op == OperatorNode::OP_IS) {
//nothing much
return op;
}
if (op->op == OperatorNode::OP_PARENT_CALL) {
//nothing much
return op;
} else if (op->op == OperatorNode::OP_CALL) {
//can reduce base type constructors
if ((op->arguments[0]->type == Node::TYPE_TYPE || (op->arguments[0]->type == Node::TYPE_BUILT_IN_FUNCTION && GDScriptFunctions::is_deterministic(static_cast<BuiltInFunctionNode *>(op->arguments[0])->function))) && last_not_constant == 0) {
//native type constructor or intrinsic function
const Variant **vptr = NULL;
Vector<Variant *> ptrs;
if (op->arguments.size() > 1) {
ptrs.resize(op->arguments.size() - 1);
for (int i = 0; i < ptrs.size(); i++) {
ConstantNode *cn = static_cast<ConstantNode *>(op->arguments[i + 1]);
ptrs.write[i] = &cn->value;
}
vptr = (const Variant **)&ptrs[0];
}
Variant::CallError ce;
Variant v;
if (op->arguments[0]->type == Node::TYPE_TYPE) {
TypeNode *tn = static_cast<TypeNode *>(op->arguments[0]);
v = Variant::construct(tn->vtype, vptr, ptrs.size(), ce);
} else {
GDScriptFunctions::Function func = static_cast<BuiltInFunctionNode *>(op->arguments[0])->function;
GDScriptFunctions::call(func, vptr, ptrs.size(), v, ce);
}
if (ce.error != Variant::CallError::CALL_OK) {
String errwhere;
if (op->arguments[0]->type == Node::TYPE_TYPE) {
TypeNode *tn = static_cast<TypeNode *>(op->arguments[0]);
errwhere = "'" + Variant::get_type_name(tn->vtype) + "' constructor";
} else {
GDScriptFunctions::Function func = static_cast<BuiltInFunctionNode *>(op->arguments[0])->function;
errwhere = String("'") + GDScriptFunctions::get_func_name(func) + "' intrinsic function";
}
switch (ce.error) {
case Variant::CallError::CALL_ERROR_INVALID_ARGUMENT: {
_set_error("Invalid argument (#" + itos(ce.argument + 1) + ") for " + errwhere + ".");
} break;
case Variant::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS: {
_set_error("Too many arguments for " + errwhere + ".");
} break;
case Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS: {
_set_error("Too few arguments for " + errwhere + ".");
} break;
default: {
_set_error("Invalid arguments for " + errwhere + ".");
} break;
}
error_line = op->line;
return p_node;
}
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = v;
cn->datatype = _type_from_variant(v);
return cn;
} else if (op->arguments[0]->type == Node::TYPE_BUILT_IN_FUNCTION && last_not_constant == 0) {
}
return op; //don't reduce yet
} else if (op->op == OperatorNode::OP_YIELD) {
return op;
} else if (op->op == OperatorNode::OP_INDEX) {
//can reduce indices into constant arrays or dictionaries
if (all_constants) {
ConstantNode *ca = static_cast<ConstantNode *>(op->arguments[0]);
ConstantNode *cb = static_cast<ConstantNode *>(op->arguments[1]);
bool valid;
Variant v = ca->value.get(cb->value, &valid);
if (!valid) {
_set_error("invalid index in constant expression");
error_line = op->line;
return op;
}
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = v;
cn->datatype = _type_from_variant(v);
return cn;
}
return op;
} else if (op->op == OperatorNode::OP_INDEX_NAMED) {
if (op->arguments[0]->type == Node::TYPE_CONSTANT && op->arguments[1]->type == Node::TYPE_IDENTIFIER) {
ConstantNode *ca = static_cast<ConstantNode *>(op->arguments[0]);
IdentifierNode *ib = static_cast<IdentifierNode *>(op->arguments[1]);
bool valid;
Variant v = ca->value.get_named(ib->name, &valid);
if (!valid) {
_set_error("invalid index '" + String(ib->name) + "' in constant expression");
error_line = op->line;
return op;
}
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = v;
cn->datatype = _type_from_variant(v);
return cn;
}
return op;
}
//validate assignment (don't assign to constant expression
switch (op->op) {
case OperatorNode::OP_ASSIGN:
case OperatorNode::OP_ASSIGN_ADD:
case OperatorNode::OP_ASSIGN_SUB:
case OperatorNode::OP_ASSIGN_MUL:
case OperatorNode::OP_ASSIGN_DIV:
case OperatorNode::OP_ASSIGN_MOD:
case OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case OperatorNode::OP_ASSIGN_BIT_AND:
case OperatorNode::OP_ASSIGN_BIT_OR:
case OperatorNode::OP_ASSIGN_BIT_XOR: {
if (op->arguments[0]->type == Node::TYPE_CONSTANT) {
_set_error("Can't assign to constant", tokenizer->get_token_line() - 1);
error_line = op->line;
return op;
}
if (op->arguments[0]->type == Node::TYPE_OPERATOR) {
OperatorNode *on = static_cast<OperatorNode *>(op->arguments[0]);
if (on->op != OperatorNode::OP_INDEX && on->op != OperatorNode::OP_INDEX_NAMED) {
_set_error("Can't assign to an expression", tokenizer->get_token_line() - 1);
error_line = op->line;
return op;
}
}
} break;
default: { break; }
}
//now se if all are constants
if (!all_constants)
return op; //nothing to reduce from here on
#define _REDUCE_UNARY(m_vop) \
bool valid = false; \
Variant res; \
Variant::evaluate(m_vop, static_cast<ConstantNode *>(op->arguments[0])->value, Variant(), res, valid); \
if (!valid) { \
_set_error("Invalid operand for unary operator"); \
error_line = op->line; \
return p_node; \
} \
ConstantNode *cn = alloc_node<ConstantNode>(); \
cn->value = res; \
cn->datatype = _type_from_variant(res); \
return cn;
#define _REDUCE_BINARY(m_vop) \
bool valid = false; \
Variant res; \
Variant::evaluate(m_vop, static_cast<ConstantNode *>(op->arguments[0])->value, static_cast<ConstantNode *>(op->arguments[1])->value, res, valid); \
if (!valid) { \
_set_error("Invalid operands for operator"); \
error_line = op->line; \
return p_node; \
} \
ConstantNode *cn = alloc_node<ConstantNode>(); \
cn->value = res; \
cn->datatype = _type_from_variant(res); \
return cn;
switch (op->op) {
//unary operators
case OperatorNode::OP_NEG: {
_REDUCE_UNARY(Variant::OP_NEGATE);
} break;
case OperatorNode::OP_POS: {
_REDUCE_UNARY(Variant::OP_POSITIVE);
} break;
case OperatorNode::OP_NOT: {
_REDUCE_UNARY(Variant::OP_NOT);
} break;
case OperatorNode::OP_BIT_INVERT: {
_REDUCE_UNARY(Variant::OP_BIT_NEGATE);
} break;
//binary operators (in precedence order)
case OperatorNode::OP_IN: {
_REDUCE_BINARY(Variant::OP_IN);
} break;
case OperatorNode::OP_EQUAL: {
_REDUCE_BINARY(Variant::OP_EQUAL);
} break;
case OperatorNode::OP_NOT_EQUAL: {
_REDUCE_BINARY(Variant::OP_NOT_EQUAL);
} break;
case OperatorNode::OP_LESS: {
_REDUCE_BINARY(Variant::OP_LESS);
} break;
case OperatorNode::OP_LESS_EQUAL: {
_REDUCE_BINARY(Variant::OP_LESS_EQUAL);
} break;
case OperatorNode::OP_GREATER: {
_REDUCE_BINARY(Variant::OP_GREATER);
} break;
case OperatorNode::OP_GREATER_EQUAL: {
_REDUCE_BINARY(Variant::OP_GREATER_EQUAL);
} break;
case OperatorNode::OP_AND: {
_REDUCE_BINARY(Variant::OP_AND);
} break;
case OperatorNode::OP_OR: {
_REDUCE_BINARY(Variant::OP_OR);
} break;
case OperatorNode::OP_ADD: {
_REDUCE_BINARY(Variant::OP_ADD);
} break;
case OperatorNode::OP_SUB: {
_REDUCE_BINARY(Variant::OP_SUBTRACT);
} break;
case OperatorNode::OP_MUL: {
_REDUCE_BINARY(Variant::OP_MULTIPLY);
} break;
case OperatorNode::OP_DIV: {
_REDUCE_BINARY(Variant::OP_DIVIDE);
} break;
case OperatorNode::OP_MOD: {
_REDUCE_BINARY(Variant::OP_MODULE);
} break;
case OperatorNode::OP_SHIFT_LEFT: {
_REDUCE_BINARY(Variant::OP_SHIFT_LEFT);
} break;
case OperatorNode::OP_SHIFT_RIGHT: {
_REDUCE_BINARY(Variant::OP_SHIFT_RIGHT);
} break;
case OperatorNode::OP_BIT_AND: {
_REDUCE_BINARY(Variant::OP_BIT_AND);
} break;
case OperatorNode::OP_BIT_OR: {
_REDUCE_BINARY(Variant::OP_BIT_OR);
} break;
case OperatorNode::OP_BIT_XOR: {
_REDUCE_BINARY(Variant::OP_BIT_XOR);
} break;
case OperatorNode::OP_TERNARY_IF: {
if (static_cast<ConstantNode *>(op->arguments[0])->value.booleanize()) {
return op->arguments[1];
} else {
return op->arguments[2];
}
} break;
default: { ERR_FAIL_V(op); }
}
ERR_FAIL_V(op);
} break;
default: {
return p_node;
} break;
}
}
GDScriptParser::Node *GDScriptParser::_parse_and_reduce_expression(Node *p_parent, bool p_static, bool p_reduce_const, bool p_allow_assign) {
Node *expr = _parse_expression(p_parent, p_static, p_allow_assign, p_reduce_const);
if (!expr || error_set)
return NULL;
expr = _reduce_expression(expr, p_reduce_const);
if (!expr || error_set)
return NULL;
return expr;
}
bool GDScriptParser::_recover_from_completion() {
if (!completion_found) {
return false; //can't recover if no completion
}
//skip stuff until newline
while (tokenizer->get_token() != GDScriptTokenizer::TK_NEWLINE && tokenizer->get_token() != GDScriptTokenizer::TK_EOF && tokenizer->get_token() != GDScriptTokenizer::TK_ERROR) {
tokenizer->advance();
}
completion_found = false;
error_set = false;
if (tokenizer->get_token() == GDScriptTokenizer::TK_ERROR) {
error_set = true;
}
return true;
}
GDScriptParser::PatternNode *GDScriptParser::_parse_pattern(bool p_static) {
PatternNode *pattern = alloc_node<PatternNode>();
GDScriptTokenizer::Token token = tokenizer->get_token();
if (error_set)
return NULL;
if (token == GDScriptTokenizer::TK_EOF) {
return NULL;
}
switch (token) {
// array
case GDScriptTokenizer::TK_BRACKET_OPEN: {
tokenizer->advance();
pattern->pt_type = GDScriptParser::PatternNode::PT_ARRAY;
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_BRACKET_CLOSE) {
tokenizer->advance();
break;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PERIOD && tokenizer->get_token(1) == GDScriptTokenizer::TK_PERIOD) {
// match everything
tokenizer->advance(2);
PatternNode *sub_pattern = alloc_node<PatternNode>();
sub_pattern->pt_type = GDScriptParser::PatternNode::PT_IGNORE_REST;
pattern->array.push_back(sub_pattern);
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA && tokenizer->get_token(1) == GDScriptTokenizer::TK_BRACKET_CLOSE) {
tokenizer->advance(2);
break;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BRACKET_CLOSE) {
tokenizer->advance(1);
break;
} else {
_set_error("'..' pattern only allowed at the end of an array pattern");
return NULL;
}
}
PatternNode *sub_pattern = _parse_pattern(p_static);
if (!sub_pattern) {
return NULL;
}
pattern->array.push_back(sub_pattern);
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
continue;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_BRACKET_CLOSE) {
tokenizer->advance();
break;
} else {
_set_error("Not a valid pattern");
return NULL;
}
}
} break;
// bind
case GDScriptTokenizer::TK_PR_VAR: {
tokenizer->advance();
if (!tokenizer->is_token_literal()) {
_set_error("Expected identifier for binding variable name.");
return NULL;
}
pattern->pt_type = GDScriptParser::PatternNode::PT_BIND;
pattern->bind = tokenizer->get_token_identifier();
// Check if variable name is already used
BlockNode *bl = current_block;
while (bl) {
if (bl->variables.has(pattern->bind)) {
_set_error("Binding name of '" + pattern->bind.operator String() + "' is already declared in this scope.");
return NULL;
}
bl = bl->parent_block;
}
// Create local variable for proper identifier detection later
LocalVarNode *lv = alloc_node<LocalVarNode>();
lv->name = pattern->bind;
current_block->variables.insert(lv->name, lv);
tokenizer->advance();
} break;
// dictionary
case GDScriptTokenizer::TK_CURLY_BRACKET_OPEN: {
tokenizer->advance();
pattern->pt_type = GDScriptParser::PatternNode::PT_DICTIONARY;
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURLY_BRACKET_CLOSE) {
tokenizer->advance();
break;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PERIOD && tokenizer->get_token(1) == GDScriptTokenizer::TK_PERIOD) {
// match everything
tokenizer->advance(2);
PatternNode *sub_pattern = alloc_node<PatternNode>();
sub_pattern->pt_type = PatternNode::PT_IGNORE_REST;
pattern->array.push_back(sub_pattern);
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA && tokenizer->get_token(1) == GDScriptTokenizer::TK_CURLY_BRACKET_CLOSE) {
tokenizer->advance(2);
break;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CURLY_BRACKET_CLOSE) {
tokenizer->advance(1);
break;
} else {
_set_error("'..' pattern only allowed at the end of a dictionary pattern");
return NULL;
}
}
Node *key = _parse_and_reduce_expression(pattern, p_static);
if (!key) {
_set_error("Not a valid key in pattern");
return NULL;
}
if (key->type != GDScriptParser::Node::TYPE_CONSTANT) {
_set_error("Not a constant expression as key");
return NULL;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_COLON) {
tokenizer->advance();
PatternNode *value = _parse_pattern(p_static);
if (!value) {
_set_error("Expected pattern in dictionary value");
return NULL;
}
pattern->dictionary.insert(static_cast<ConstantNode *>(key), value);
} else {
pattern->dictionary.insert(static_cast<ConstantNode *>(key), NULL);
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
continue;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CURLY_BRACKET_CLOSE) {
tokenizer->advance();
break;
} else {
_set_error("Not a valid pattern");
return NULL;
}
}
} break;
case GDScriptTokenizer::TK_WILDCARD: {
tokenizer->advance();
pattern->pt_type = PatternNode::PT_WILDCARD;
} break;
// all the constants like strings and numbers
default: {
Node *value = _parse_and_reduce_expression(pattern, p_static);
if (!value) {
_set_error("Expect constant expression or variables in a pattern");
return NULL;
}
if (value->type == Node::TYPE_OPERATOR) {
// Maybe it's SomeEnum.VALUE
Node *current_value = value;
while (current_value->type == Node::TYPE_OPERATOR) {
OperatorNode *op_node = static_cast<OperatorNode *>(current_value);
if (op_node->op != OperatorNode::OP_INDEX_NAMED) {
_set_error("Invalid operator in pattern. Only index (`A.B`) is allowed");
return NULL;
}
current_value = op_node->arguments[0];
}
if (current_value->type != Node::TYPE_IDENTIFIER) {
_set_error("Only constant expression or variables allowed in a pattern");
return NULL;
}
} else if (value->type != Node::TYPE_IDENTIFIER && value->type != Node::TYPE_CONSTANT) {
_set_error("Only constant expressions or variables allowed in a pattern");
return NULL;
}
pattern->pt_type = PatternNode::PT_CONSTANT;
pattern->constant = value;
} break;
}
return pattern;
}
void GDScriptParser::_parse_pattern_block(BlockNode *p_block, Vector<PatternBranchNode *> &p_branches, bool p_static) {
int indent_level = tab_level.back()->get();
while (true) {
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE && _parse_newline())
;
// GDScriptTokenizer::Token token = tokenizer->get_token();
if (error_set)
return;
if (indent_level > tab_level.back()->get()) {
return; // go back a level
}
if (pending_newline != -1) {
pending_newline = -1;
}
PatternBranchNode *branch = alloc_node<PatternBranchNode>();
branch->body = alloc_node<BlockNode>();
branch->body->parent_block = p_block;
p_block->sub_blocks.push_back(branch->body);
current_block = branch->body;
branch->patterns.push_back(_parse_pattern(p_static));
if (!branch->patterns[0]) {
return;
}
bool has_binding = branch->patterns[0]->pt_type == PatternNode::PT_BIND;
bool catch_all = has_binding || branch->patterns[0]->pt_type == PatternNode::PT_WILDCARD;
while (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
branch->patterns.push_back(_parse_pattern(p_static));
if (!branch->patterns[branch->patterns.size() - 1]) {
return;
}
PatternNode::PatternType pt = branch->patterns[branch->patterns.size() - 1]->pt_type;
if (pt == PatternNode::PT_BIND) {
_set_error("Cannot use bindings with multipattern.");
return;
}
catch_all = catch_all || pt == PatternNode::PT_WILDCARD;
}
if (!_enter_indent_block()) {
_set_error("Expected block in pattern branch");
return;
}
_parse_block(branch->body, p_static);
current_block = p_block;
if (catch_all && branch->body->has_return) {
p_block->has_return = true;
}
p_branches.push_back(branch);
}
}
void GDScriptParser::_generate_pattern(PatternNode *p_pattern, Node *p_node_to_match, Node *&p_resulting_node, Map<StringName, Node *> &p_bindings) {
const DataType &to_match_type = p_node_to_match->get_datatype();
switch (p_pattern->pt_type) {
case PatternNode::PT_CONSTANT: {
DataType pattern_type = _reduce_node_type(p_pattern->constant);
if (error_set) {
return;
}
OperatorNode *type_comp = NULL;
// static type check if possible
if (pattern_type.has_type && to_match_type.has_type) {
if (!_is_type_compatible(to_match_type, pattern_type) && !_is_type_compatible(pattern_type, to_match_type)) {
_set_error("Pattern type (" + pattern_type.to_string() + ") is not compatible with the type of the value to match (" + to_match_type.to_string() + ").",
p_pattern->line);
return;
}
} else {
// runtime typecheck
BuiltInFunctionNode *typeof_node = alloc_node<BuiltInFunctionNode>();
typeof_node->function = GDScriptFunctions::TYPE_OF;
OperatorNode *typeof_match_value = alloc_node<OperatorNode>();
typeof_match_value->op = OperatorNode::OP_CALL;
typeof_match_value->arguments.push_back(typeof_node);
typeof_match_value->arguments.push_back(p_node_to_match);
OperatorNode *typeof_pattern_value = alloc_node<OperatorNode>();
typeof_pattern_value->op = OperatorNode::OP_CALL;
typeof_pattern_value->arguments.push_back(typeof_node);
typeof_pattern_value->arguments.push_back(p_pattern->constant);
type_comp = alloc_node<OperatorNode>();
type_comp->op = OperatorNode::OP_EQUAL;
type_comp->arguments.push_back(typeof_match_value);
type_comp->arguments.push_back(typeof_pattern_value);
}
// compare the actual values
OperatorNode *value_comp = alloc_node<OperatorNode>();
value_comp->op = OperatorNode::OP_EQUAL;
value_comp->arguments.push_back(p_pattern->constant);
value_comp->arguments.push_back(p_node_to_match);
if (type_comp) {
OperatorNode *full_comparison = alloc_node<OperatorNode>();
full_comparison->op = OperatorNode::OP_AND;
full_comparison->arguments.push_back(type_comp);
full_comparison->arguments.push_back(value_comp);
p_resulting_node = full_comparison;
} else {
p_resulting_node = value_comp;
}
} break;
case PatternNode::PT_BIND: {
p_bindings[p_pattern->bind] = p_node_to_match;
// a bind always matches
ConstantNode *true_value = alloc_node<ConstantNode>();
true_value->value = Variant(true);
p_resulting_node = true_value;
} break;
case PatternNode::PT_ARRAY: {
bool open_ended = false;
if (p_pattern->array.size() > 0) {
if (p_pattern->array[p_pattern->array.size() - 1]->pt_type == PatternNode::PT_IGNORE_REST) {
open_ended = true;
}
}
// typeof(value_to_match) == TYPE_ARRAY && value_to_match.size() >= length
// typeof(value_to_match) == TYPE_ARRAY && value_to_match.size() == length
{
OperatorNode *type_comp = NULL;
// static type check if possible
if (to_match_type.has_type) {
// must be an array
if (to_match_type.kind != DataType::BUILTIN || to_match_type.builtin_type != Variant::ARRAY) {
_set_error("Cannot match an array pattern with a non-array expression.", p_pattern->line);
return;
}
} else {
// runtime typecheck
BuiltInFunctionNode *typeof_node = alloc_node<BuiltInFunctionNode>();
typeof_node->function = GDScriptFunctions::TYPE_OF;
OperatorNode *typeof_match_value = alloc_node<OperatorNode>();
typeof_match_value->op = OperatorNode::OP_CALL;
typeof_match_value->arguments.push_back(typeof_node);
typeof_match_value->arguments.push_back(p_node_to_match);
IdentifierNode *typeof_array = alloc_node<IdentifierNode>();
typeof_array->name = "TYPE_ARRAY";
type_comp = alloc_node<OperatorNode>();
type_comp->op = OperatorNode::OP_EQUAL;
type_comp->arguments.push_back(typeof_match_value);
type_comp->arguments.push_back(typeof_array);
}
// size
ConstantNode *length = alloc_node<ConstantNode>();
length->value = Variant(open_ended ? p_pattern->array.size() - 1 : p_pattern->array.size());
OperatorNode *call = alloc_node<OperatorNode>();
call->op = OperatorNode::OP_CALL;
call->arguments.push_back(p_node_to_match);
IdentifierNode *size = alloc_node<IdentifierNode>();
size->name = "size";
call->arguments.push_back(size);
OperatorNode *length_comparison = alloc_node<OperatorNode>();
length_comparison->op = open_ended ? OperatorNode::OP_GREATER_EQUAL : OperatorNode::OP_EQUAL;
length_comparison->arguments.push_back(call);
length_comparison->arguments.push_back(length);
if (type_comp) {
OperatorNode *type_and_length_comparison = alloc_node<OperatorNode>();
type_and_length_comparison->op = OperatorNode::OP_AND;
type_and_length_comparison->arguments.push_back(type_comp);
type_and_length_comparison->arguments.push_back(length_comparison);
p_resulting_node = type_and_length_comparison;
} else {
p_resulting_node = length_comparison;
}
}
for (int i = 0; i < p_pattern->array.size(); i++) {
PatternNode *pattern = p_pattern->array[i];
Node *condition = NULL;
ConstantNode *index = alloc_node<ConstantNode>();
index->value = Variant(i);
OperatorNode *indexed_value = alloc_node<OperatorNode>();
indexed_value->op = OperatorNode::OP_INDEX;
indexed_value->arguments.push_back(p_node_to_match);
indexed_value->arguments.push_back(index);
_generate_pattern(pattern, indexed_value, condition, p_bindings);
// concatenate all the patterns with &&
OperatorNode *and_node = alloc_node<OperatorNode>();
and_node->op = OperatorNode::OP_AND;
and_node->arguments.push_back(p_resulting_node);
and_node->arguments.push_back(condition);
p_resulting_node = and_node;
}
} break;
case PatternNode::PT_DICTIONARY: {
bool open_ended = false;
if (p_pattern->array.size() > 0) {
open_ended = true;
}
// typeof(value_to_match) == TYPE_DICTIONARY && value_to_match.size() >= length
// typeof(value_to_match) == TYPE_DICTIONARY && value_to_match.size() == length
{
OperatorNode *type_comp = NULL;
// static type check if possible
if (to_match_type.has_type) {
// must be an dictionary
if (to_match_type.kind != DataType::BUILTIN || to_match_type.builtin_type != Variant::DICTIONARY) {
_set_error("Cannot match an dictionary pattern with a non-dictionary expression.", p_pattern->line);
return;
}
} else {
// runtime typecheck
BuiltInFunctionNode *typeof_node = alloc_node<BuiltInFunctionNode>();
typeof_node->function = GDScriptFunctions::TYPE_OF;
OperatorNode *typeof_match_value = alloc_node<OperatorNode>();
typeof_match_value->op = OperatorNode::OP_CALL;
typeof_match_value->arguments.push_back(typeof_node);
typeof_match_value->arguments.push_back(p_node_to_match);
IdentifierNode *typeof_dictionary = alloc_node<IdentifierNode>();
typeof_dictionary->name = "TYPE_DICTIONARY";
type_comp = alloc_node<OperatorNode>();
type_comp->op = OperatorNode::OP_EQUAL;
type_comp->arguments.push_back(typeof_match_value);
type_comp->arguments.push_back(typeof_dictionary);
}
// size
ConstantNode *length = alloc_node<ConstantNode>();
length->value = Variant(open_ended ? p_pattern->dictionary.size() - 1 : p_pattern->dictionary.size());
OperatorNode *call = alloc_node<OperatorNode>();
call->op = OperatorNode::OP_CALL;
call->arguments.push_back(p_node_to_match);
IdentifierNode *size = alloc_node<IdentifierNode>();
size->name = "size";
call->arguments.push_back(size);
OperatorNode *length_comparison = alloc_node<OperatorNode>();
length_comparison->op = open_ended ? OperatorNode::OP_GREATER_EQUAL : OperatorNode::OP_EQUAL;
length_comparison->arguments.push_back(call);
length_comparison->arguments.push_back(length);
if (type_comp) {
OperatorNode *type_and_length_comparison = alloc_node<OperatorNode>();
type_and_length_comparison->op = OperatorNode::OP_AND;
type_and_length_comparison->arguments.push_back(type_comp);
type_and_length_comparison->arguments.push_back(length_comparison);
p_resulting_node = type_and_length_comparison;
} else {
p_resulting_node = length_comparison;
}
}
for (Map<ConstantNode *, PatternNode *>::Element *e = p_pattern->dictionary.front(); e; e = e->next()) {
Node *condition = NULL;
// check for has, then for pattern
IdentifierNode *has = alloc_node<IdentifierNode>();
has->name = "has";
OperatorNode *has_call = alloc_node<OperatorNode>();
has_call->op = OperatorNode::OP_CALL;
has_call->arguments.push_back(p_node_to_match);
has_call->arguments.push_back(has);
has_call->arguments.push_back(e->key());
if (e->value()) {
OperatorNode *indexed_value = alloc_node<OperatorNode>();
indexed_value->op = OperatorNode::OP_INDEX;
indexed_value->arguments.push_back(p_node_to_match);
indexed_value->arguments.push_back(e->key());
_generate_pattern(e->value(), indexed_value, condition, p_bindings);
OperatorNode *has_and_pattern = alloc_node<OperatorNode>();
has_and_pattern->op = OperatorNode::OP_AND;
has_and_pattern->arguments.push_back(has_call);
has_and_pattern->arguments.push_back(condition);
condition = has_and_pattern;
} else {
condition = has_call;
}
// concatenate all the patterns with &&
OperatorNode *and_node = alloc_node<OperatorNode>();
and_node->op = OperatorNode::OP_AND;
and_node->arguments.push_back(p_resulting_node);
and_node->arguments.push_back(condition);
p_resulting_node = and_node;
}
} break;
case PatternNode::PT_IGNORE_REST:
case PatternNode::PT_WILDCARD: {
// simply generate a `true`
ConstantNode *true_value = alloc_node<ConstantNode>();
true_value->value = Variant(true);
p_resulting_node = true_value;
} break;
default: {
} break;
}
}
void GDScriptParser::_transform_match_statment(MatchNode *p_match_statement) {
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = "#match_value";
id->line = p_match_statement->line;
id->datatype = _reduce_node_type(p_match_statement->val_to_match);
if (id->datatype.has_type) {
_mark_line_as_safe(id->line);
} else {
_mark_line_as_unsafe(id->line);
}
if (error_set) {
return;
}
for (int i = 0; i < p_match_statement->branches.size(); i++) {
PatternBranchNode *branch = p_match_statement->branches[i];
MatchNode::CompiledPatternBranch compiled_branch;
compiled_branch.compiled_pattern = NULL;
Map<StringName, Node *> binding;
for (int j = 0; j < branch->patterns.size(); j++) {
PatternNode *pattern = branch->patterns[j];
_mark_line_as_safe(pattern->line);
Map<StringName, Node *> bindings;
Node *resulting_node = NULL;
_generate_pattern(pattern, id, resulting_node, bindings);
if (!resulting_node) {
return;
}
if (!binding.empty() && !bindings.empty()) {
_set_error("Multipatterns can't contain bindings");
return;
} else {
binding = bindings;
}
// Result is always a boolean
DataType resulting_node_type;
resulting_node_type.has_type = true;
resulting_node_type.is_constant = true;
resulting_node_type.kind = DataType::BUILTIN;
resulting_node_type.builtin_type = Variant::BOOL;
resulting_node->set_datatype(resulting_node_type);
if (compiled_branch.compiled_pattern) {
OperatorNode *or_node = alloc_node<OperatorNode>();
or_node->op = OperatorNode::OP_OR;
or_node->arguments.push_back(compiled_branch.compiled_pattern);
or_node->arguments.push_back(resulting_node);
compiled_branch.compiled_pattern = or_node;
} else {
// single pattern | first one
compiled_branch.compiled_pattern = resulting_node;
}
}
// prepare the body ...hehe
for (Map<StringName, Node *>::Element *e = binding.front(); e; e = e->next()) {
if (!branch->body->variables.has(e->key())) {
_set_error("Parser bug: missing pattern bind variable.", branch->line);
ERR_FAIL();
}
LocalVarNode *local_var = branch->body->variables[e->key()];
local_var->assign = e->value();
local_var->set_datatype(local_var->assign->get_datatype());
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = local_var->name;
id->declared_block = branch->body;
id->set_datatype(local_var->assign->get_datatype());
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_ASSIGN;
op->arguments.push_back(id);
op->arguments.push_back(local_var->assign);
branch->body->statements.push_front(op);
branch->body->statements.push_front(local_var);
}
compiled_branch.body = branch->body;
p_match_statement->compiled_pattern_branches.push_back(compiled_branch);
}
}
void GDScriptParser::_parse_block(BlockNode *p_block, bool p_static) {
int indent_level = tab_level.back()->get();
#ifdef DEBUG_ENABLED
NewLineNode *nl = alloc_node<NewLineNode>();
nl->line = tokenizer->get_token_line();
p_block->statements.push_back(nl);
#endif
bool is_first_line = true;
while (true) {
if (!is_first_line && tab_level.back()->prev() && tab_level.back()->prev()->get() == indent_level) {
// pythonic single-line expression, don't parse future lines
tab_level.pop_back();
p_block->end_line = tokenizer->get_token_line();
return;
}
is_first_line = false;
GDScriptTokenizer::Token token = tokenizer->get_token();
if (error_set)
return;
if (indent_level > tab_level.back()->get()) {
p_block->end_line = tokenizer->get_token_line();
return; //go back a level
}
if (pending_newline != -1) {
NewLineNode *nl = alloc_node<NewLineNode>();
nl->line = pending_newline;
p_block->statements.push_back(nl);
pending_newline = -1;
}
#ifdef DEBUG_ENABLED
switch (token) {
case GDScriptTokenizer::TK_EOF:
case GDScriptTokenizer::TK_ERROR:
case GDScriptTokenizer::TK_NEWLINE:
case GDScriptTokenizer::TK_CF_PASS: {
// will check later
} break;
default: {
if (p_block->has_return && !current_function->has_unreachable_code) {
_add_warning(GDScriptWarning::UNREACHABLE_CODE, -1, current_function->name.operator String());
current_function->has_unreachable_code = true;
}
} break;
}
#endif // DEBUG_ENABLED
switch (token) {
case GDScriptTokenizer::TK_EOF:
p_block->end_line = tokenizer->get_token_line();
case GDScriptTokenizer::TK_ERROR: {
return; //go back
//end of file!
} break;
case GDScriptTokenizer::TK_NEWLINE: {
if (!_parse_newline()) {
if (!error_set) {
p_block->end_line = tokenizer->get_token_line();
pending_newline = p_block->end_line;
}
return;
}
NewLineNode *nl = alloc_node<NewLineNode>();
nl->line = tokenizer->get_token_line();
p_block->statements.push_back(nl);
} break;
case GDScriptTokenizer::TK_CF_PASS: {
if (tokenizer->get_token(1) != GDScriptTokenizer::TK_SEMICOLON && tokenizer->get_token(1) != GDScriptTokenizer::TK_NEWLINE && tokenizer->get_token(1) != GDScriptTokenizer::TK_EOF) {
_set_error("Expected ';' or <NewLine>.");
return;
}
_mark_line_as_safe(tokenizer->get_token_line());
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_SEMICOLON) {
// Ignore semicolon after 'pass'
tokenizer->advance();
}
} break;
case GDScriptTokenizer::TK_PR_VAR: {
//variale declaration and (eventual) initialization
tokenizer->advance();
int var_line = tokenizer->get_token_line();
if (!tokenizer->is_token_literal(0, true)) {
_set_error("Expected identifier for local variable name.");
return;
}
StringName n = tokenizer->get_token_literal();
tokenizer->advance();
if (current_function) {
for (int i = 0; i < current_function->arguments.size(); i++) {
if (n == current_function->arguments[i]) {
_set_error("Variable '" + String(n) + "' already defined in the scope (at line: " + itos(current_function->line) + ").");
return;
}
}
}
BlockNode *check_block = p_block;
while (check_block) {
if (check_block->variables.has(n)) {
_set_error("Variable '" + String(n) + "' already defined in the scope (at line: " + itos(check_block->variables[n]->line) + ").");
return;
}
check_block = check_block->parent_block;
}
//must know when the local variable is declared
LocalVarNode *lv = alloc_node<LocalVarNode>();
lv->name = n;
lv->line = var_line;
p_block->statements.push_back(lv);
Node *assigned = NULL;
if (tokenizer->get_token() == GDScriptTokenizer::TK_COLON) {
if (tokenizer->get_token(1) == GDScriptTokenizer::TK_OP_ASSIGN) {
lv->datatype = DataType();
#ifdef DEBUG_ENABLED
lv->datatype.infer_type = true;
#endif
tokenizer->advance();
} else if (!_parse_type(lv->datatype)) {
_set_error("Expected type for variable.");
return;
}
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_ASSIGN) {
tokenizer->advance();
Node *subexpr = _parse_and_reduce_expression(p_block, p_static);
if (!subexpr) {
if (_recover_from_completion()) {
break;
}
return;
}
lv->assignments++;
assigned = subexpr;
} else {
ConstantNode *c = alloc_node<ConstantNode>();
if (lv->datatype.has_type && lv->datatype.kind == DataType::BUILTIN) {
Variant::CallError err;
c->value = Variant::construct(lv->datatype.builtin_type, NULL, 0, err);
} else {
c->value = Variant();
}
c->line = var_line;
assigned = c;
}
lv->assign = assigned;
//must be added later, to avoid self-referencing.
p_block->variables.insert(n, lv);
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = n;
id->declared_block = p_block;
id->line = var_line;
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_ASSIGN;
op->arguments.push_back(id);
op->arguments.push_back(assigned);
op->line = var_line;
p_block->statements.push_back(op);
lv->assign_op = op;
lv->assign = assigned;
lv->assign_op = op;
if (!_end_statement()) {
_set_error("Expected end of statement (var)");
return;
}
} break;
case GDScriptTokenizer::TK_CF_IF: {
tokenizer->advance();
Node *condition = _parse_and_reduce_expression(p_block, p_static);
if (!condition) {
if (_recover_from_completion()) {
break;
}
return;
}
ControlFlowNode *cf_if = alloc_node<ControlFlowNode>();
cf_if->cf_type = ControlFlowNode::CF_IF;
cf_if->arguments.push_back(condition);
cf_if->body = alloc_node<BlockNode>();
cf_if->body->parent_block = p_block;
cf_if->body->if_condition = condition; //helps code completion
p_block->sub_blocks.push_back(cf_if->body);
if (!_enter_indent_block(cf_if->body)) {
_set_error("Expected indented block after 'if'");
p_block->end_line = tokenizer->get_token_line();
return;
}
current_block = cf_if->body;
_parse_block(cf_if->body, p_static);
current_block = p_block;
if (error_set)
return;
p_block->statements.push_back(cf_if);
bool all_have_return = cf_if->body->has_return;
bool have_else = false;
while (true) {
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE && _parse_newline())
;
if (tab_level.back()->get() < indent_level) { //not at current indent level
p_block->end_line = tokenizer->get_token_line();
return;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_CF_ELIF) {
if (tab_level.back()->get() > indent_level) {
_set_error("Invalid indent");
return;
}
tokenizer->advance();
cf_if->body_else = alloc_node<BlockNode>();
cf_if->body_else->parent_block = p_block;
p_block->sub_blocks.push_back(cf_if->body_else);
ControlFlowNode *cf_else = alloc_node<ControlFlowNode>();
cf_else->cf_type = ControlFlowNode::CF_IF;
//condition
Node *condition = _parse_and_reduce_expression(p_block, p_static);
if (!condition) {
if (_recover_from_completion()) {
break;
}
return;
}
cf_else->arguments.push_back(condition);
cf_else->cf_type = ControlFlowNode::CF_IF;
cf_if->body_else->statements.push_back(cf_else);
cf_if = cf_else;
cf_if->body = alloc_node<BlockNode>();
cf_if->body->parent_block = p_block;
p_block->sub_blocks.push_back(cf_if->body);
if (!_enter_indent_block(cf_if->body)) {
_set_error("Expected indented block after 'elif'");
p_block->end_line = tokenizer->get_token_line();
return;
}
current_block = cf_else->body;
_parse_block(cf_else->body, p_static);
current_block = p_block;
if (error_set)
return;
all_have_return = all_have_return && cf_else->body->has_return;
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CF_ELSE) {
if (tab_level.back()->get() > indent_level) {
_set_error("Invalid indent");
return;
}
tokenizer->advance();
cf_if->body_else = alloc_node<BlockNode>();
cf_if->body_else->parent_block = p_block;
p_block->sub_blocks.push_back(cf_if->body_else);
if (!_enter_indent_block(cf_if->body_else)) {
_set_error("Expected indented block after 'else'");
p_block->end_line = tokenizer->get_token_line();
return;
}
current_block = cf_if->body_else;
_parse_block(cf_if->body_else, p_static);
current_block = p_block;
if (error_set)
return;
all_have_return = all_have_return && cf_if->body_else->has_return;
have_else = true;
break; //after else, exit
} else
break;
}
cf_if->body->has_return = all_have_return;
// If there's no else block, path out of the if might not have a return
p_block->has_return = all_have_return && have_else;
} break;
case GDScriptTokenizer::TK_CF_WHILE: {
tokenizer->advance();
Node *condition = _parse_and_reduce_expression(p_block, p_static);
if (!condition) {
if (_recover_from_completion()) {
break;
}
return;
}
ControlFlowNode *cf_while = alloc_node<ControlFlowNode>();
cf_while->cf_type = ControlFlowNode::CF_WHILE;
cf_while->arguments.push_back(condition);
cf_while->body = alloc_node<BlockNode>();
cf_while->body->parent_block = p_block;
p_block->sub_blocks.push_back(cf_while->body);
if (!_enter_indent_block(cf_while->body)) {
_set_error("Expected indented block after 'while'");
p_block->end_line = tokenizer->get_token_line();
return;
}
current_block = cf_while->body;
_parse_block(cf_while->body, p_static);
current_block = p_block;
if (error_set)
return;
p_block->has_return = cf_while->body->has_return;
p_block->statements.push_back(cf_while);
} break;
case GDScriptTokenizer::TK_CF_FOR: {
tokenizer->advance();
if (!tokenizer->is_token_literal(0, true)) {
_set_error("identifier expected after 'for'");
}
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = tokenizer->get_token_identifier();
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_OP_IN) {
_set_error("'in' expected after identifier");
return;
}
tokenizer->advance();
Node *container = _parse_and_reduce_expression(p_block, p_static);
if (!container) {
if (_recover_from_completion()) {
break;
}
return;
}
DataType iter_type;
iter_type.is_constant = true;
if (container->type == Node::TYPE_OPERATOR) {
OperatorNode *op = static_cast<OperatorNode *>(container);
if (op->op == OperatorNode::OP_CALL && op->arguments[0]->type == Node::TYPE_BUILT_IN_FUNCTION && static_cast<BuiltInFunctionNode *>(op->arguments[0])->function == GDScriptFunctions::GEN_RANGE) {
//iterating a range, so see if range() can be optimized without allocating memory, by replacing it by vectors (which can work as iterable too!)
Vector<Node *> args;
Vector<double> constants;
bool constant = false;
for (int i = 1; i < op->arguments.size(); i++) {
args.push_back(op->arguments[i]);
if (constant && op->arguments[i]->type == Node::TYPE_CONSTANT) {
ConstantNode *c = static_cast<ConstantNode *>(op->arguments[i]);
if (c->value.get_type() == Variant::REAL || c->value.get_type() == Variant::INT) {
constants.push_back(c->value);
constant = true;
}
} else {
constant = false;
}
}
if (args.size() > 0 && args.size() < 4) {
if (constant) {
ConstantNode *cn = alloc_node<ConstantNode>();
switch (args.size()) {
case 1: cn->value = (int)constants[0]; break;
case 2: cn->value = Vector2(constants[0], constants[1]); break;
case 3: cn->value = Vector3(constants[0], constants[1], constants[2]); break;
}
cn->datatype = _type_from_variant(cn->value);
container = cn;
} else {
OperatorNode *on = alloc_node<OperatorNode>();
on->op = OperatorNode::OP_CALL;
TypeNode *tn = alloc_node<TypeNode>();
on->arguments.push_back(tn);
switch (args.size()) {
case 1: tn->vtype = Variant::INT; break;
case 2: tn->vtype = Variant::VECTOR2; break;
case 3: tn->vtype = Variant::VECTOR3; break;
}
for (int i = 0; i < args.size(); i++) {
on->arguments.push_back(args[i]);
}
container = on;
}
}
iter_type.has_type = true;
iter_type.kind = DataType::BUILTIN;
iter_type.builtin_type = Variant::INT;
}
}
ControlFlowNode *cf_for = alloc_node<ControlFlowNode>();
cf_for->cf_type = ControlFlowNode::CF_FOR;
cf_for->arguments.push_back(id);
cf_for->arguments.push_back(container);
cf_for->body = alloc_node<BlockNode>();
cf_for->body->parent_block = p_block;
p_block->sub_blocks.push_back(cf_for->body);
if (!_enter_indent_block(cf_for->body)) {
_set_error("Expected indented block after 'for'");
p_block->end_line = tokenizer->get_token_line();
return;
}
current_block = cf_for->body;
// this is for checking variable for redefining
// inside this _parse_block
LocalVarNode *lv = alloc_node<LocalVarNode>();
lv->name = id->name;
lv->line = id->line;
lv->assignments++;
id->declared_block = cf_for->body;
lv->set_datatype(iter_type);
id->set_datatype(iter_type);
cf_for->body->variables.insert(id->name, lv);
_parse_block(cf_for->body, p_static);
current_block = p_block;
if (error_set)
return;
p_block->has_return = cf_for->body->has_return;
p_block->statements.push_back(cf_for);
} break;
case GDScriptTokenizer::TK_CF_CONTINUE: {
tokenizer->advance();
ControlFlowNode *cf_continue = alloc_node<ControlFlowNode>();
cf_continue->cf_type = ControlFlowNode::CF_CONTINUE;
p_block->statements.push_back(cf_continue);
if (!_end_statement()) {
_set_error("Expected end of statement (continue)");
return;
}
} break;
case GDScriptTokenizer::TK_CF_BREAK: {
tokenizer->advance();
ControlFlowNode *cf_break = alloc_node<ControlFlowNode>();
cf_break->cf_type = ControlFlowNode::CF_BREAK;
p_block->statements.push_back(cf_break);
if (!_end_statement()) {
_set_error("Expected end of statement (break)");
return;
}
} break;
case GDScriptTokenizer::TK_CF_RETURN: {
tokenizer->advance();
ControlFlowNode *cf_return = alloc_node<ControlFlowNode>();
cf_return->cf_type = ControlFlowNode::CF_RETURN;
cf_return->line = tokenizer->get_token_line(-1);
if (tokenizer->get_token() == GDScriptTokenizer::TK_SEMICOLON || tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE || tokenizer->get_token() == GDScriptTokenizer::TK_EOF) {
//expect end of statement
p_block->statements.push_back(cf_return);
if (!_end_statement()) {
return;
}
} else {
//expect expression
Node *retexpr = _parse_and_reduce_expression(p_block, p_static);
if (!retexpr) {
if (_recover_from_completion()) {
break;
}
return;
}
cf_return->arguments.push_back(retexpr);
p_block->statements.push_back(cf_return);
if (!_end_statement()) {
_set_error("Expected end of statement after return expression.");
return;
}
}
p_block->has_return = true;
} break;
case GDScriptTokenizer::TK_CF_MATCH: {
tokenizer->advance();
MatchNode *match_node = alloc_node<MatchNode>();
Node *val_to_match = _parse_and_reduce_expression(p_block, p_static);
if (!val_to_match) {
if (_recover_from_completion()) {
break;
}
return;
}
match_node->val_to_match = val_to_match;
if (!_enter_indent_block()) {
_set_error("Expected indented pattern matching block after 'match'");
return;
}
BlockNode *compiled_branches = alloc_node<BlockNode>();
compiled_branches->parent_block = p_block;
compiled_branches->parent_class = p_block->parent_class;
p_block->sub_blocks.push_back(compiled_branches);
_parse_pattern_block(compiled_branches, match_node->branches, p_static);
if (error_set) return;
ControlFlowNode *match_cf_node = alloc_node<ControlFlowNode>();
match_cf_node->cf_type = ControlFlowNode::CF_MATCH;
match_cf_node->match = match_node;
match_cf_node->body = compiled_branches;
p_block->has_return = p_block->has_return || compiled_branches->has_return;
p_block->statements.push_back(match_cf_node);
_end_statement();
} break;
case GDScriptTokenizer::TK_PR_ASSERT: {
tokenizer->advance();
Node *condition = _parse_and_reduce_expression(p_block, p_static);
if (!condition) {
if (_recover_from_completion()) {
break;
}
return;
}
AssertNode *an = alloc_node<AssertNode>();
an->condition = condition;
p_block->statements.push_back(an);
if (!_end_statement()) {
_set_error("Expected end of statement after assert.");
return;
}
} break;
case GDScriptTokenizer::TK_PR_BREAKPOINT: {
tokenizer->advance();
BreakpointNode *bn = alloc_node<BreakpointNode>();
p_block->statements.push_back(bn);
if (!_end_statement()) {
_set_error("Expected end of statement after breakpoint.");
return;
}
} break;
default: {
Node *expression = _parse_and_reduce_expression(p_block, p_static, false, true);
if (!expression) {
if (_recover_from_completion()) {
break;
}
return;
}
p_block->statements.push_back(expression);
if (!_end_statement()) {
_set_error("Expected end of statement after expression.");
return;
}
} break;
}
}
}
bool GDScriptParser::_parse_newline() {
if (tokenizer->get_token(1) != GDScriptTokenizer::TK_EOF && tokenizer->get_token(1) != GDScriptTokenizer::TK_NEWLINE) {
int indent = tokenizer->get_token_line_indent();
int current_indent = tab_level.back()->get();
if (indent > current_indent) {
_set_error("Unexpected indent.");
return false;
}
if (indent < current_indent) {
while (indent < current_indent) {
//exit block
if (tab_level.size() == 1) {
_set_error("Invalid indent. BUG?");
return false;
}
tab_level.pop_back();
if (tab_level.back()->get() < indent) {
_set_error("Unindent does not match any outer indentation level.");
return false;
}
current_indent = tab_level.back()->get();
}
tokenizer->advance();
return false;
}
}
tokenizer->advance();
return true;
}
void GDScriptParser::_parse_extends(ClassNode *p_class) {
if (p_class->extends_used) {
_set_error("'extends' already used for this class.");
return;
}
if (!p_class->constant_expressions.empty() || !p_class->subclasses.empty() || !p_class->functions.empty() || !p_class->variables.empty()) {
_set_error("'extends' must be used before anything else.");
return;
}
p_class->extends_used = true;
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_TYPE && tokenizer->get_token_type() == Variant::OBJECT) {
p_class->extends_class.push_back(Variant::get_type_name(Variant::OBJECT));
tokenizer->advance();
return;
}
// see if inheritance happens from a file
if (tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT) {
Variant constant = tokenizer->get_token_constant();
if (constant.get_type() != Variant::STRING) {
_set_error("'extends' constant must be a string.");
return;
}
p_class->extends_file = constant;
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PERIOD) {
return;
} else
tokenizer->advance();
}
while (true) {
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_IDENTIFIER: {
StringName identifier = tokenizer->get_token_identifier();
p_class->extends_class.push_back(identifier);
} break;
case GDScriptTokenizer::TK_PERIOD:
break;
default: {
_set_error("Invalid 'extends' syntax, expected string constant (path) and/or identifier (parent class).");
return;
}
}
tokenizer->advance(1);
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_IDENTIFIER:
case GDScriptTokenizer::TK_PERIOD:
continue;
default:
return;
}
}
}
void GDScriptParser::_parse_class(ClassNode *p_class) {
int indent_level = tab_level.back()->get();
while (true) {
GDScriptTokenizer::Token token = tokenizer->get_token();
if (error_set)
return;
if (indent_level > tab_level.back()->get()) {
p_class->end_line = tokenizer->get_token_line();
return; //go back a level
}
switch (token) {
case GDScriptTokenizer::TK_CURSOR: {
tokenizer->advance();
} break;
case GDScriptTokenizer::TK_EOF:
p_class->end_line = tokenizer->get_token_line();
case GDScriptTokenizer::TK_ERROR: {
return; //go back
//end of file!
} break;
case GDScriptTokenizer::TK_NEWLINE: {
if (!_parse_newline()) {
if (!error_set) {
p_class->end_line = tokenizer->get_token_line();
}
return;
}
} break;
case GDScriptTokenizer::TK_PR_EXTENDS: {
_mark_line_as_safe(tokenizer->get_token_line());
_parse_extends(p_class);
if (error_set)
return;
if (!_end_statement()) {
_set_error("Expected end of statement after extends");
return;
}
} break;
case GDScriptTokenizer::TK_PR_CLASS_NAME: {
if (p_class->owner) {
_set_error("'class_name' is only valid for the main class namespace.");
return;
}
if (tokenizer->get_token(1) != GDScriptTokenizer::TK_IDENTIFIER) {
_set_error("'class_name' syntax: 'class_name <UniqueName>'");
return;
}
p_class->name = tokenizer->get_token_identifier(1);
if (self_path != String() && ScriptServer::is_global_class(p_class->name) && ScriptServer::get_global_class_path(p_class->name) != self_path) {
_set_error("Unique global class '" + p_class->name + "' already exists at path: " + ScriptServer::get_global_class_path(p_class->name));
return;
}
if (ClassDB::class_exists(p_class->name)) {
_set_error("Class '" + p_class->name + "' shadows a native class.");
return;
}
tokenizer->advance(2);
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
if ((tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT && tokenizer->get_token_constant().get_type() == Variant::STRING)) {
Variant constant = tokenizer->get_token_constant();
String icon_path = constant.operator String();
String abs_icon_path = icon_path.is_rel_path() ? self_path.get_base_dir().plus_file(icon_path).simplify_path() : icon_path;
if (!FileAccess::exists(abs_icon_path)) {
_set_error("No class icon found at: " + abs_icon_path);
return;
}
p_class->icon_path = icon_path;
tokenizer->advance();
} else {
_set_error("Optional parameter after 'class_name' must be a string constant file path to an icon.");
return;
}
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT) {
_set_error("Class icon must be separated by a comma.");
return;
}
} break;
case GDScriptTokenizer::TK_PR_TOOL: {
if (p_class->tool) {
_set_error("tool used more than once");
return;
}
p_class->tool = true;
tokenizer->advance();
} break;
case GDScriptTokenizer::TK_PR_CLASS: {
//class inside class :D
StringName name;
if (tokenizer->get_token(1) != GDScriptTokenizer::TK_IDENTIFIER) {
_set_error("'class' syntax: 'class <Name>:' or 'class <Name> extends <BaseClass>:'");
return;
}
name = tokenizer->get_token_identifier(1);
tokenizer->advance(2);
// Check if name is shadowing something else
if (ClassDB::class_exists(name) || ClassDB::class_exists("_" + name.operator String())) {
_set_error("Class '" + String(name) + "' shadows a native class.");
return;
}
if (ScriptServer::is_global_class(name)) {
_set_error("Can't override name of unique global class '" + name + "' already exists at path: " + ScriptServer::get_global_class_path(p_class->name));
return;
}
ClassNode *outer_class = p_class;
while (outer_class) {
for (int i = 0; i < outer_class->subclasses.size(); i++) {
if (outer_class->subclasses[i]->name == name) {
_set_error("Another class named '" + String(name) + "' already exists in this scope (at line " + itos(outer_class->subclasses[i]->line) + ").");
return;
}
}
if (outer_class->constant_expressions.has(name)) {
_set_error("A constant named '" + String(name) + "' already exists in the outer class scope (at line" + itos(outer_class->constant_expressions[name].expression->line) + ").");
return;
}
outer_class = outer_class->owner;
}
ClassNode *newclass = alloc_node<ClassNode>();
newclass->initializer = alloc_node<BlockNode>();
newclass->initializer->parent_class = newclass;
newclass->ready = alloc_node<BlockNode>();
newclass->ready->parent_class = newclass;
newclass->name = name;
newclass->owner = p_class;
p_class->subclasses.push_back(newclass);
if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_EXTENDS) {
_parse_extends(newclass);
if (error_set)
return;
}
if (!_enter_indent_block()) {
_set_error("Indented block expected.");
return;
}
current_class = newclass;
_parse_class(newclass);
current_class = p_class;
} break;
/* this is for functions....
case GDScriptTokenizer::TK_CF_PASS: {
tokenizer->advance(1);
} break;
*/
case GDScriptTokenizer::TK_PR_STATIC: {
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
_set_error("Expected 'func'.");
return;
}
}; //fallthrough to function
case GDScriptTokenizer::TK_PR_FUNCTION: {
bool _static = false;
pending_newline = -1;
if (tokenizer->get_token(-1) == GDScriptTokenizer::TK_PR_STATIC) {
_static = true;
}
tokenizer->advance();
StringName name;
if (_get_completable_identifier(COMPLETION_VIRTUAL_FUNC, name)) {
}
if (name == StringName()) {
_set_error("Expected identifier after 'func' (syntax: 'func <identifier>([arguments]):' ).");
return;
}
for (int i = 0; i < p_class->functions.size(); i++) {
if (p_class->functions[i]->name == name) {
_set_error("Function '" + String(name) + "' already exists in this class (at line: " + itos(p_class->functions[i]->line) + ").");
}
}
for (int i = 0; i < p_class->static_functions.size(); i++) {
if (p_class->static_functions[i]->name == name) {
_set_error("Function '" + String(name) + "' already exists in this class (at line: " + itos(p_class->static_functions[i]->line) + ").");
}
}
#ifdef DEBUG_ENABLED
if (p_class->constant_expressions.has(name)) {
_add_warning(GDScriptWarning::FUNCTION_CONFLICTS_CONSTANT, -1, name);
}
for (int i = 0; i < p_class->variables.size(); i++) {
if (p_class->variables[i].identifier == name) {
_add_warning(GDScriptWarning::FUNCTION_CONFLICTS_VARIABLE, -1, name);
}
}
#endif // DEBUG_ENABLED
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
_set_error("Expected '(' after identifier (syntax: 'func <identifier>([arguments]):' ).");
return;
}
tokenizer->advance();
Vector<StringName> arguments;
Vector<DataType> argument_types;
Vector<Node *> default_values;
#ifdef DEBUG_ENABLED
Vector<int> arguments_usage;
#endif // DEBUG_ENABLED
int fnline = tokenizer->get_token_line();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
//has arguments
bool defaulting = false;
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
continue;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_VAR) {
tokenizer->advance(); //var before the identifier is allowed
}
if (!tokenizer->is_token_literal(0, true)) {
_set_error("Expected identifier for argument.");
return;
}
StringName argname = tokenizer->get_token_identifier();
arguments.push_back(argname);
#ifdef DEBUG_ENABLED
arguments_usage.push_back(0);
#endif // DEBUG_ENABLED
tokenizer->advance();
DataType argtype;
if (tokenizer->get_token() == GDScriptTokenizer::TK_COLON) {
if (tokenizer->get_token(1) == GDScriptTokenizer::TK_OP_ASSIGN) {
argtype.infer_type = true;
tokenizer->advance();
} else if (!_parse_type(argtype)) {
_set_error("Expected type for argument.");
return;
}
}
argument_types.push_back(argtype);
if (defaulting && tokenizer->get_token() != GDScriptTokenizer::TK_OP_ASSIGN) {
_set_error("Default parameter expected.");
return;
}
//tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_ASSIGN) {
defaulting = true;
tokenizer->advance(1);
Node *defval = _parse_and_reduce_expression(p_class, _static);
if (!defval || error_set)
return;
OperatorNode *on = alloc_node<OperatorNode>();
on->op = OperatorNode::OP_ASSIGN;
on->line = fnline;
IdentifierNode *in = alloc_node<IdentifierNode>();
in->name = argname;
in->line = fnline;
on->arguments.push_back(in);
on->arguments.push_back(defval);
/* no ..
if (defval->type!=Node::TYPE_CONSTANT) {
_set_error("default argument must be constant");
}
*/
default_values.push_back(on);
}
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
continue;
} else if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ',' or ')'.");
return;
}
break;
}
}
tokenizer->advance();
BlockNode *block = alloc_node<BlockNode>();
block->parent_class = p_class;
FunctionNode *function = alloc_node<FunctionNode>();
function->name = name;
function->arguments = arguments;
function->argument_types = argument_types;
function->default_values = default_values;
function->_static = _static;
function->line = fnline;
#ifdef DEBUG_ENABLED
function->arguments_usage = arguments_usage;
#endif // DEBUG_ENABLED
function->rpc_mode = rpc_mode;
rpc_mode = MultiplayerAPI::RPC_MODE_DISABLED;
if (name == "_init") {
if (_static) {
_set_error("Constructor cannot be static.");
return;
}
if (p_class->extends_used) {
OperatorNode *cparent = alloc_node<OperatorNode>();
cparent->op = OperatorNode::OP_PARENT_CALL;
block->statements.push_back(cparent);
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = "_init";
cparent->arguments.push_back(id);
if (tokenizer->get_token() == GDScriptTokenizer::TK_PERIOD) {
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
_set_error("expected '(' for parent constructor arguments.");
return;
}
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
//has arguments
parenthesis++;
while (true) {
current_function = function;
Node *arg = _parse_and_reduce_expression(p_class, _static);
current_function = NULL;
cparent->arguments.push_back(arg);
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
continue;
} else if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ',' or ')'.");
return;
}
break;
}
parenthesis--;
}
tokenizer->advance();
}
} else {
if (tokenizer->get_token() == GDScriptTokenizer::TK_PERIOD) {
_set_error("Parent constructor call found for a class without inheritance.");
return;
}
}
}
DataType return_type;
if (tokenizer->get_token() == GDScriptTokenizer::TK_FORWARD_ARROW) {
if (!_parse_type(return_type, true)) {
_set_error("Expected return type for function.");
return;
}
}
if (!_enter_indent_block(block)) {
_set_error("Indented block expected.");
return;
}
function->return_type = return_type;
if (_static)
p_class->static_functions.push_back(function);
else
p_class->functions.push_back(function);
current_function = function;
function->body = block;
current_block = block;
_parse_block(block, _static);
current_block = NULL;
//arguments
} break;
case GDScriptTokenizer::TK_PR_SIGNAL: {
tokenizer->advance();
if (!tokenizer->is_token_literal()) {
_set_error("Expected identifier after 'signal'.");
return;
}
ClassNode::Signal sig;
sig.name = tokenizer->get_token_identifier();
sig.emissions = 0;
sig.line = tokenizer->get_token_line();
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
tokenizer->advance();
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
continue;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
tokenizer->advance();
break;
}
if (!tokenizer->is_token_literal(0, true)) {
_set_error("Expected identifier in signal argument.");
return;
}
sig.arguments.push_back(tokenizer->get_token_identifier());
tokenizer->advance();
while (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance();
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
} else if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ',' or ')' after signal parameter identifier.");
return;
}
}
}
p_class->_signals.push_back(sig);
if (!_end_statement()) {
_set_error("Expected end of statement (signal)");
return;
}
} break;
case GDScriptTokenizer::TK_PR_EXPORT: {
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_OPEN) {
tokenizer->advance();
String hint_prefix = "";
bool is_arrayed = false;
while (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_TYPE &&
tokenizer->get_token_type() == Variant::ARRAY &&
tokenizer->get_token(1) == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance(); // Array
tokenizer->advance(); // Comma
if (is_arrayed) {
hint_prefix += itos(Variant::ARRAY) + ":";
} else {
is_arrayed = true;
}
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_BUILT_IN_TYPE) {
Variant::Type type = tokenizer->get_token_type();
if (type == Variant::NIL) {
_set_error("Can't export null type.");
return;
}
if (type == Variant::OBJECT) {
_set_error("Can't export raw object type.");
return;
}
current_export.type = type;
current_export.usage |= PROPERTY_USAGE_SCRIPT_VARIABLE;
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
// hint expected next!
tokenizer->advance();
switch (type) {
case Variant::INT: {
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "FLAGS") {
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
ERR_EXPLAIN("Exporting bit flags hint requires string constants.");
WARN_DEPRECATED
break;
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
_set_error("Expected ',' in bit flags hint.");
return;
}
current_export.hint = PROPERTY_HINT_FLAGS;
tokenizer->advance();
bool first = true;
while (true) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || tokenizer->get_token_constant().get_type() != Variant::STRING) {
current_export = PropertyInfo();
_set_error("Expected a string constant in named bit flags hint.");
return;
}
String c = tokenizer->get_token_constant();
if (!first)
current_export.hint_string += ",";
else
first = false;
current_export.hint_string += c.xml_escape();
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
break;
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
current_export = PropertyInfo();
_set_error("Expected ')' or ',' in named bit flags hint.");
return;
}
tokenizer->advance();
}
break;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT && tokenizer->get_token_constant().get_type() == Variant::STRING) {
//enumeration
current_export.hint = PROPERTY_HINT_ENUM;
bool first = true;
while (true) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || tokenizer->get_token_constant().get_type() != Variant::STRING) {
current_export = PropertyInfo();
_set_error("Expected a string constant in enumeration hint.");
return;
}
String c = tokenizer->get_token_constant();
if (!first)
current_export.hint_string += ",";
else
first = false;
current_export.hint_string += c.xml_escape();
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
break;
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
current_export = PropertyInfo();
_set_error("Expected ')' or ',' in enumeration hint.");
return;
}
tokenizer->advance();
}
break;
}
}; //fallthrough to use the same
case Variant::REAL: {
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "EASE") {
current_export.hint = PROPERTY_HINT_EXP_EASING;
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' in hint.");
return;
}
break;
}
// range
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "EXP") {
current_export.hint = PROPERTY_HINT_EXP_RANGE;
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
break;
else if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
_set_error("Expected ')' or ',' in exponential range hint.");
return;
}
tokenizer->advance();
} else
current_export.hint = PROPERTY_HINT_RANGE;
float sign = 1.0;
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_SUB) {
sign = -1;
tokenizer->advance();
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || !tokenizer->get_token_constant().is_num()) {
current_export = PropertyInfo();
_set_error("Expected a range in numeric hint.");
return;
}
current_export.hint_string = rtos(sign * double(tokenizer->get_token_constant()));
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
current_export.hint_string = "0," + current_export.hint_string;
break;
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
current_export = PropertyInfo();
_set_error("Expected ',' or ')' in numeric range hint.");
return;
}
tokenizer->advance();
sign = 1.0;
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_SUB) {
sign = -1;
tokenizer->advance();
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || !tokenizer->get_token_constant().is_num()) {
current_export = PropertyInfo();
_set_error("Expected a number as upper bound in numeric range hint.");
return;
}
current_export.hint_string += "," + rtos(sign * double(tokenizer->get_token_constant()));
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
break;
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
current_export = PropertyInfo();
_set_error("Expected ',' or ')' in numeric range hint.");
return;
}
tokenizer->advance();
sign = 1.0;
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_SUB) {
sign = -1;
tokenizer->advance();
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || !tokenizer->get_token_constant().is_num()) {
current_export = PropertyInfo();
_set_error("Expected a number as step in numeric range hint.");
return;
}
current_export.hint_string += "," + rtos(sign * double(tokenizer->get_token_constant()));
tokenizer->advance();
} break;
case Variant::STRING: {
if (tokenizer->get_token() == GDScriptTokenizer::TK_CONSTANT && tokenizer->get_token_constant().get_type() == Variant::STRING) {
//enumeration
current_export.hint = PROPERTY_HINT_ENUM;
bool first = true;
while (true) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || tokenizer->get_token_constant().get_type() != Variant::STRING) {
current_export = PropertyInfo();
_set_error("Expected a string constant in enumeration hint.");
return;
}
String c = tokenizer->get_token_constant();
if (!first)
current_export.hint_string += ",";
else
first = false;
current_export.hint_string += c.xml_escape();
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
break;
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
current_export = PropertyInfo();
_set_error("Expected ')' or ',' in enumeration hint.");
return;
}
tokenizer->advance();
}
break;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "DIR") {
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
current_export.hint = PROPERTY_HINT_DIR;
else if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_IDENTIFIER || !(tokenizer->get_token_identifier() == "GLOBAL")) {
_set_error("Expected 'GLOBAL' after comma in directory hint.");
return;
}
if (!p_class->tool) {
_set_error("Global filesystem hints may only be used in tool scripts.");
return;
}
current_export.hint = PROPERTY_HINT_GLOBAL_DIR;
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' in hint.");
return;
}
} else {
_set_error("Expected ')' or ',' in hint.");
return;
}
break;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "FILE") {
current_export.hint = PROPERTY_HINT_FILE;
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "GLOBAL") {
if (!p_class->tool) {
_set_error("Global filesystem hints may only be used in tool scripts.");
return;
}
current_export.hint = PROPERTY_HINT_GLOBAL_FILE;
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_CLOSE)
break;
else if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA)
tokenizer->advance();
else {
_set_error("Expected ')' or ',' in hint.");
return;
}
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_CONSTANT || tokenizer->get_token_constant().get_type() != Variant::STRING) {
if (current_export.hint == PROPERTY_HINT_GLOBAL_FILE)
_set_error("Expected string constant with filter");
else
_set_error("Expected 'GLOBAL' or string constant with filter");
return;
}
current_export.hint_string = tokenizer->get_token_constant();
tokenizer->advance();
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' in hint.");
return;
}
break;
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "MULTILINE") {
current_export.hint = PROPERTY_HINT_MULTILINE_TEXT;
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
_set_error("Expected ')' in hint.");
return;
}
break;
}
} break;
case Variant::COLOR: {
if (tokenizer->get_token() != GDScriptTokenizer::TK_IDENTIFIER) {
current_export = PropertyInfo();
_set_error("Color type hint expects RGB or RGBA as hints");
return;
}
String identifier = tokenizer->get_token_identifier();
if (identifier == "RGB") {
current_export.hint = PROPERTY_HINT_COLOR_NO_ALPHA;
} else if (identifier == "RGBA") {
//none
} else {
current_export = PropertyInfo();
_set_error("Color type hint expects RGB or RGBA as hints");
return;
}
tokenizer->advance();
} break;
default: {
current_export = PropertyInfo();
_set_error("Type '" + Variant::get_type_name(type) + "' can't take hints.");
return;
} break;
}
}
} else {
parenthesis++;
Node *subexpr = _parse_and_reduce_expression(p_class, true, true);
if (!subexpr) {
if (_recover_from_completion()) {
break;
}
return;
}
parenthesis--;
if (subexpr->type != Node::TYPE_CONSTANT) {
current_export = PropertyInfo();
_set_error("Expected a constant expression.");
}
Variant constant = static_cast<ConstantNode *>(subexpr)->value;
if (constant.get_type() == Variant::OBJECT) {
GDScriptNativeClass *native_class = Object::cast_to<GDScriptNativeClass>(constant);
if (native_class && ClassDB::is_parent_class(native_class->get_name(), "Resource")) {
current_export.type = Variant::OBJECT;
current_export.hint = PROPERTY_HINT_RESOURCE_TYPE;
current_export.usage |= PROPERTY_USAGE_SCRIPT_VARIABLE;
current_export.hint_string = native_class->get_name();
current_export.class_name = native_class->get_name();
} else {
current_export = PropertyInfo();
_set_error("Export hint not a resource type.");
}
} else if (constant.get_type() == Variant::DICTIONARY) {
// Enumeration
bool is_flags = false;
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "FLAGS") {
is_flags = true;
tokenizer->advance();
} else {
current_export = PropertyInfo();
_set_error("Expected 'FLAGS' after comma.");
}
}
current_export.type = Variant::INT;
current_export.hint = is_flags ? PROPERTY_HINT_FLAGS : PROPERTY_HINT_ENUM;
current_export.usage |= PROPERTY_USAGE_SCRIPT_VARIABLE;
Dictionary enum_values = constant;
List<Variant> keys;
enum_values.get_key_list(&keys);
bool first = true;
for (List<Variant>::Element *E = keys.front(); E; E = E->next()) {
if (enum_values[E->get()].get_type() == Variant::INT) {
if (!first)
current_export.hint_string += ",";
else
first = false;
current_export.hint_string += E->get().operator String().camelcase_to_underscore(true).capitalize().xml_escape();
if (!is_flags) {
current_export.hint_string += ":";
current_export.hint_string += enum_values[E->get()].operator String().xml_escape();
}
}
}
} else {
current_export = PropertyInfo();
_set_error("Expected type for export.");
return;
}
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_PARENTHESIS_CLOSE) {
current_export = PropertyInfo();
_set_error("Expected ')' or ',' after export hint.");
return;
}
if (is_arrayed) {
hint_prefix += itos(current_export.type);
if (current_export.hint) {
hint_prefix += "/" + itos(current_export.hint);
}
current_export.hint_string = hint_prefix + ":" + current_export.hint_string;
current_export.hint = PROPERTY_HINT_TYPE_STRING;
current_export.type = Variant::ARRAY;
}
tokenizer->advance();
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_ONREADY && tokenizer->get_token() != GDScriptTokenizer::TK_PR_REMOTE && tokenizer->get_token() != GDScriptTokenizer::TK_PR_MASTER && tokenizer->get_token() != GDScriptTokenizer::TK_PR_PUPPET && tokenizer->get_token() != GDScriptTokenizer::TK_PR_SYNC && tokenizer->get_token() != GDScriptTokenizer::TK_PR_REMOTESYNC && tokenizer->get_token() != GDScriptTokenizer::TK_PR_MASTERSYNC && tokenizer->get_token() != GDScriptTokenizer::TK_PR_PUPPETSYNC && tokenizer->get_token() != GDScriptTokenizer::TK_PR_SLAVE) {
current_export = PropertyInfo();
_set_error("Expected 'var', 'onready', 'remote', 'master', 'puppet', 'sync', 'remotesync', 'mastersync', 'puppetsync'.");
return;
}
continue;
} break;
case GDScriptTokenizer::TK_PR_ONREADY: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR) {
_set_error("Expected 'var'.");
return;
}
continue;
} break;
case GDScriptTokenizer::TK_PR_REMOTE: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (current_export.type) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR) {
_set_error("Expected 'var'.");
return;
}
} else {
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
_set_error("Expected 'var' or 'func'.");
return;
}
}
rpc_mode = MultiplayerAPI::RPC_MODE_REMOTE;
continue;
} break;
case GDScriptTokenizer::TK_PR_MASTER: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (current_export.type) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR) {
_set_error("Expected 'var'.");
return;
}
} else {
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
_set_error("Expected 'var' or 'func'.");
return;
}
}
rpc_mode = MultiplayerAPI::RPC_MODE_MASTER;
continue;
} break;
case GDScriptTokenizer::TK_PR_SLAVE:
#ifdef DEBUG_ENABLED
_add_warning(GDScriptWarning::DEPRECATED_KEYWORD, tokenizer->get_token_line(), "slave", "puppet");
#endif
case GDScriptTokenizer::TK_PR_PUPPET: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (current_export.type) {
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR) {
_set_error("Expected 'var'.");
return;
}
} else {
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
_set_error("Expected 'var' or 'func'.");
return;
}
}
rpc_mode = MultiplayerAPI::RPC_MODE_PUPPET;
continue;
} break;
case GDScriptTokenizer::TK_PR_REMOTESYNC:
case GDScriptTokenizer::TK_PR_SYNC: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
if (current_export.type)
_set_error("Expected 'var'.");
else
_set_error("Expected 'var' or 'func'.");
return;
}
rpc_mode = MultiplayerAPI::RPC_MODE_REMOTESYNC;
continue;
} break;
case GDScriptTokenizer::TK_PR_MASTERSYNC: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
if (current_export.type)
_set_error("Expected 'var'.");
else
_set_error("Expected 'var' or 'func'.");
return;
}
rpc_mode = MultiplayerAPI::RPC_MODE_MASTERSYNC;
continue;
} break;
case GDScriptTokenizer::TK_PR_PUPPETSYNC: {
//may be fallthrough from export, ignore if so
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_PR_VAR && tokenizer->get_token() != GDScriptTokenizer::TK_PR_FUNCTION) {
if (current_export.type)
_set_error("Expected 'var'.");
else
_set_error("Expected 'var' or 'func'.");
return;
}
rpc_mode = MultiplayerAPI::RPC_MODE_PUPPETSYNC;
continue;
} break;
case GDScriptTokenizer::TK_PR_VAR: {
//variale declaration and (eventual) initialization
ClassNode::Member member;
bool autoexport = tokenizer->get_token(-1) == GDScriptTokenizer::TK_PR_EXPORT;
if (current_export.type != Variant::NIL) {
member._export = current_export;
current_export = PropertyInfo();
}
bool onready = tokenizer->get_token(-1) == GDScriptTokenizer::TK_PR_ONREADY;
tokenizer->advance();
if (!tokenizer->is_token_literal(0, true)) {
_set_error("Expected identifier for member variable name.");
return;
}
member.identifier = tokenizer->get_token_literal();
member.expression = NULL;
member._export.name = member.identifier;
member.line = tokenizer->get_token_line();
member.usages = 0;
member.rpc_mode = rpc_mode;
#ifdef TOOLS_ENABLED
Variant::CallError ce;
member.default_value = Variant::construct(member._export.type, NULL, 0, ce);
#endif
if (current_class->constant_expressions.has(member.identifier)) {
_set_error("A constant named '" + String(member.identifier) + "' already exists in this class (at line: " +
itos(current_class->constant_expressions[member.identifier].expression->line) + ").");
return;
}
for (int i = 0; i < current_class->variables.size(); i++) {
if (current_class->variables[i].identifier == member.identifier) {
_set_error("Variable '" + String(member.identifier) + "' already exists in this class (at line: " +
itos(current_class->variables[i].line) + ").");
return;
}
}
#ifdef DEBUG_ENABLED
for (int i = 0; i < current_class->functions.size(); i++) {
if (current_class->functions[i]->name == member.identifier) {
_add_warning(GDScriptWarning::VARIABLE_CONFLICTS_FUNCTION, member.line, member.identifier);
break;
}
}
for (int i = 0; i < current_class->static_functions.size(); i++) {
if (current_class->static_functions[i]->name == member.identifier) {
_add_warning(GDScriptWarning::VARIABLE_CONFLICTS_FUNCTION, member.line, member.identifier);
break;
}
}
#endif // DEBUG_ENABLED
tokenizer->advance();
rpc_mode = MultiplayerAPI::RPC_MODE_DISABLED;
if (tokenizer->get_token() == GDScriptTokenizer::TK_COLON) {
if (tokenizer->get_token(1) == GDScriptTokenizer::TK_OP_ASSIGN) {
member.data_type = DataType();
#ifdef DEBUG_ENABLED
member.data_type.infer_type = true;
#endif
tokenizer->advance();
} else if (!_parse_type(member.data_type)) {
_set_error("Expected type for class variable.");
return;
}
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_ASSIGN) {
#ifdef DEBUG_ENABLED
int line = tokenizer->get_token_line();
#endif
tokenizer->advance();
Node *subexpr = _parse_and_reduce_expression(p_class, false, autoexport || member._export.type != Variant::NIL);
if (!subexpr) {
if (_recover_from_completion()) {
break;
}
return;
}
//discourage common error
if (!onready && subexpr->type == Node::TYPE_OPERATOR) {
OperatorNode *op = static_cast<OperatorNode *>(subexpr);
if (op->op == OperatorNode::OP_CALL && op->arguments[0]->type == Node::TYPE_SELF && op->arguments[1]->type == Node::TYPE_IDENTIFIER) {
IdentifierNode *id = static_cast<IdentifierNode *>(op->arguments[1]);
if (id->name == "get_node") {
_set_error("Use 'onready var " + String(member.identifier) + " = get_node(..)' instead");
return;
}
}
}
member.expression = subexpr;
if (autoexport && !member.data_type.has_type) {
if (subexpr->type != Node::TYPE_CONSTANT) {
_set_error("Type-less export needs a constant expression assigned to infer type.");
return;
}
ConstantNode *cn = static_cast<ConstantNode *>(subexpr);
if (cn->value.get_type() == Variant::NIL) {
_set_error("Can't accept a null constant expression for inferring export type.");
return;
}
member._export.type = cn->value.get_type();
member._export.usage |= PROPERTY_USAGE_SCRIPT_VARIABLE;
if (cn->value.get_type() == Variant::OBJECT) {
Object *obj = cn->value;
Resource *res = Object::cast_to<Resource>(obj);
if (res == NULL) {
_set_error("Exported constant not a type or resource.");
return;
}
member._export.hint = PROPERTY_HINT_RESOURCE_TYPE;
member._export.hint_string = res->get_class();
}
}
#ifdef TOOLS_ENABLED
if (subexpr->type == Node::TYPE_CONSTANT && (member._export.type != Variant::NIL || member.data_type.has_type)) {
ConstantNode *cn = static_cast<ConstantNode *>(subexpr);
if (cn->value.get_type() != Variant::NIL) {
member.default_value = cn->value;
}
}
#endif
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = member.identifier;
OperatorNode *op = alloc_node<OperatorNode>();
op->op = OperatorNode::OP_INIT_ASSIGN;
op->arguments.push_back(id);
op->arguments.push_back(subexpr);
#ifdef DEBUG_ENABLED
NewLineNode *nl = alloc_node<NewLineNode>();
nl->line = line;
if (onready)
p_class->ready->statements.push_back(nl);
else
p_class->initializer->statements.push_back(nl);
#endif
if (onready)
p_class->ready->statements.push_back(op);
else
p_class->initializer->statements.push_back(op);
member.initial_assignment = op;
} else {
if (autoexport && !member.data_type.has_type) {
_set_error("Type-less export needs a constant expression assigned to infer type.");
return;
}
}
if (autoexport && member.data_type.has_type) {
if (member.data_type.kind == DataType::BUILTIN) {
member._export.type = member.data_type.builtin_type;
} else if (member.data_type.kind == DataType::NATIVE) {
if (ClassDB::is_parent_class(member.data_type.native_type, "Resource")) {
member._export.type = Variant::OBJECT;
member._export.hint = PROPERTY_HINT_RESOURCE_TYPE;
member._export.usage |= PROPERTY_USAGE_SCRIPT_VARIABLE;
member._export.hint_string = member.data_type.native_type;
member._export.class_name = member.data_type.native_type;
} else {
_set_error("Invalid export type. Only built-in and native resource types can be exported.", member.line);
return;
}
} else {
_set_error("Invalid export type. Only built-in and native resource types can be exported.", member.line);
return;
}
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_PR_SETGET) {
tokenizer->advance();
if (tokenizer->get_token() != GDScriptTokenizer::TK_COMMA) {
//just comma means using only getter
if (!tokenizer->is_token_literal()) {
_set_error("Expected identifier for setter function after 'setget'.");
}
member.setter = tokenizer->get_token_literal();
tokenizer->advance();
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
//there is a getter
tokenizer->advance();
if (!tokenizer->is_token_literal()) {
_set_error("Expected identifier for getter function after ','.");
}
member.getter = tokenizer->get_token_literal();
tokenizer->advance();
}
}
p_class->variables.push_back(member);
if (!_end_statement()) {
_set_error("Expected end of statement (continue)");
return;
}
} break;
case GDScriptTokenizer::TK_PR_CONST: {
// constant declaration and initialization
ClassNode::Constant constant;
tokenizer->advance();
if (!tokenizer->is_token_literal(0, true)) {
_set_error("Expected name (identifier) for constant.");
return;
}
StringName const_id = tokenizer->get_token_literal();
int line = tokenizer->get_token_line();
if (current_class->constant_expressions.has(const_id)) {
_set_error("Constant '" + String(const_id) + "' already exists in this class (at line: " +
itos(current_class->constant_expressions[const_id].expression->line) + ").");
return;
}
for (int i = 0; i < current_class->variables.size(); i++) {
if (current_class->variables[i].identifier == const_id) {
_set_error("A variable named '" + String(const_id) + "' already exists in this class (at line: " +
itos(current_class->variables[i].line) + ").");
return;
}
}
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_COLON) {
if (tokenizer->get_token(1) == GDScriptTokenizer::TK_OP_ASSIGN) {
constant.type = DataType();
#ifdef DEBUG_ENABLED
constant.type.infer_type = true;
#endif
tokenizer->advance();
} else if (!_parse_type(constant.type)) {
_set_error("Expected type for class constant.");
return;
}
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_OP_ASSIGN) {
_set_error("Constant expects assignment.");
return;
}
tokenizer->advance();
Node *subexpr = _parse_and_reduce_expression(p_class, true, true);
if (!subexpr) {
if (_recover_from_completion()) {
break;
}
return;
}
if (subexpr->type != Node::TYPE_CONSTANT) {
_set_error("Expected constant expression", line);
return;
}
subexpr->line = line;
constant.expression = subexpr;
p_class->constant_expressions.insert(const_id, constant);
if (!_end_statement()) {
_set_error("Expected end of statement (constant)", line);
return;
}
} break;
case GDScriptTokenizer::TK_PR_ENUM: {
//multiple constant declarations..
int last_assign = -1; // Incremented by 1 right before the assignment.
String enum_name;
Dictionary enum_dict;
tokenizer->advance();
if (tokenizer->is_token_literal(0, true)) {
enum_name = tokenizer->get_token_literal();
if (current_class->constant_expressions.has(enum_name)) {
_set_error("A constant named '" + String(enum_name) + "' already exists in this class (at line: " +
itos(current_class->constant_expressions[enum_name].expression->line) + ").");
return;
}
for (int i = 0; i < current_class->variables.size(); i++) {
if (current_class->variables[i].identifier == enum_name) {
_set_error("A variable named '" + String(enum_name) + "' already exists in this class (at line: " +
itos(current_class->variables[i].line) + ").");
return;
}
}
tokenizer->advance();
}
if (tokenizer->get_token() != GDScriptTokenizer::TK_CURLY_BRACKET_OPEN) {
_set_error("Expected '{' in enum declaration");
return;
}
tokenizer->advance();
while (true) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_NEWLINE) {
tokenizer->advance(); // Ignore newlines
} else if (tokenizer->get_token() == GDScriptTokenizer::TK_CURLY_BRACKET_CLOSE) {
tokenizer->advance();
break; // End of enum
} else if (!tokenizer->is_token_literal(0, true)) {
if (tokenizer->get_token() == GDScriptTokenizer::TK_EOF) {
_set_error("Unexpected end of file.");
} else {
_set_error(String("Unexpected ") + GDScriptTokenizer::get_token_name(tokenizer->get_token()) + ", expected identifier");
}
return;
} else { // tokenizer->is_token_literal(0, true)
StringName const_id = tokenizer->get_token_literal();
tokenizer->advance();
ConstantNode *enum_value_expr;
if (tokenizer->get_token() == GDScriptTokenizer::TK_OP_ASSIGN) {
tokenizer->advance();
Node *subexpr = _parse_and_reduce_expression(p_class, true, true);
if (!subexpr) {
if (_recover_from_completion()) {
break;
}
return;
}
if (subexpr->type != Node::TYPE_CONSTANT) {
_set_error("Expected constant expression");
return;
}
enum_value_expr = static_cast<ConstantNode *>(subexpr);
if (enum_value_expr->value.get_type() != Variant::INT) {
_set_error("Expected an int value for enum");
return;
}
last_assign = enum_value_expr->value;
} else {
last_assign = last_assign + 1;
enum_value_expr = alloc_node<ConstantNode>();
enum_value_expr->value = last_assign;
enum_value_expr->datatype = _type_from_variant(enum_value_expr->value);
}
if (tokenizer->get_token() == GDScriptTokenizer::TK_COMMA) {
tokenizer->advance();
}
if (enum_name != "") {
enum_dict[const_id] = enum_value_expr->value;
} else {
if (current_class->constant_expressions.has(const_id)) {
_set_error("A constant named '" + String(const_id) + "' already exists in this class (at line: " +
itos(current_class->constant_expressions[const_id].expression->line) + ").");
return;
}
for (int i = 0; i < current_class->variables.size(); i++) {
if (current_class->variables[i].identifier == const_id) {
_set_error("A variable named '" + String(const_id) + "' already exists in this class (at line: " +
itos(current_class->variables[i].line) + ").");
return;
}
}
ClassNode::Constant constant;
constant.type.has_type = true;
constant.type.kind = DataType::BUILTIN;
constant.type.builtin_type = Variant::INT;
constant.expression = enum_value_expr;
p_class->constant_expressions.insert(const_id, constant);
}
}
}
if (enum_name != "") {
ClassNode::Constant enum_constant;
ConstantNode *cn = alloc_node<ConstantNode>();
cn->value = enum_dict;
cn->datatype = _type_from_variant(cn->value);
enum_constant.expression = cn;
enum_constant.type = cn->datatype;
p_class->constant_expressions.insert(enum_name, enum_constant);
}
if (!_end_statement()) {
_set_error("Expected end of statement (enum)");
return;
}
} break;
case GDScriptTokenizer::TK_CONSTANT: {
if (tokenizer->get_token_constant().get_type() == Variant::STRING) {
tokenizer->advance();
// Ignore
} else {
_set_error(String() + "Unexpected constant of type: " + Variant::get_type_name(tokenizer->get_token_constant().get_type()));
return;
}
} break;
default: {
_set_error(String() + "Unexpected token: " + tokenizer->get_token_name(tokenizer->get_token()) + ":" + tokenizer->get_token_identifier());
return;
} break;
}
}
}
void GDScriptParser::_determine_inheritance(ClassNode *p_class) {
if (p_class->extends_used) {
//do inheritance
String path = p_class->extends_file;
Ref<GDScript> script;
StringName native;
ClassNode *base_class = NULL;
if (path != "") {
//path (and optionally subclasses)
if (path.is_rel_path()) {
String base = base_path;
if (base == "" || base.is_rel_path()) {
_set_error("Could not resolve relative path for parent class: " + path, p_class->line);
return;
}
path = base.plus_file(path).simplify_path();
}
script = ResourceLoader::load(path);
if (script.is_null()) {
_set_error("Could not load base class: " + path, p_class->line);
return;
}
if (!script->is_valid()) {
_set_error("Script not fully loaded (cyclic preload?): " + path, p_class->line);
return;
}
if (p_class->extends_class.size()) {
for (int i = 0; i < p_class->extends_class.size(); i++) {
String sub = p_class->extends_class[i];
if (script->get_subclasses().has(sub)) {
Ref<Script> subclass = script->get_subclasses()[sub]; //avoid reference from disappearing
script = subclass;
} else {
_set_error("Could not find subclass: " + sub, p_class->line);
return;
}
}
}
} else {
if (p_class->extends_class.size() == 0) {
_set_error("Parser bug: undecidable inheritance.", p_class->line);
ERR_FAIL();
}
//look around for the subclasses
int extend_iter = 1;
String base = p_class->extends_class[0];
ClassNode *p = p_class->owner;
Ref<GDScript> base_script;
if (ScriptServer::is_global_class(base)) {
base_script = ResourceLoader::load(ScriptServer::get_global_class_path(base));
if (!base_script.is_valid()) {
_set_error("Class '" + base + "' could not be fully loaded (script error or cyclic dependency).", p_class->line);
return;
}
p = NULL;
}
while (p) {
bool found = false;
for (int i = 0; i < p->subclasses.size(); i++) {
if (p->subclasses[i]->name == base) {
ClassNode *test = p->subclasses[i];
while (test) {
if (test == p_class) {
_set_error("Cyclic inheritance.", test->line);
return;
}
if (test->base_type.kind == DataType::CLASS) {
test = test->base_type.class_type;
} else {
break;
}
}
found = true;
if (extend_iter < p_class->extends_class.size()) {
// Keep looking at current classes if possible
base = p_class->extends_class[extend_iter++];
p = p->subclasses[i];
} else {
base_class = p->subclasses[i];
}
break;
}
}
if (base_class) break;
if (found) continue;
if (p->constant_expressions.has(base)) {
if (p->constant_expressions[base].expression->type != Node::TYPE_CONSTANT) {
_set_error("Could not resolve constant '" + base + "'.", p_class->line);
return;
}
const ConstantNode *cn = static_cast<const ConstantNode *>(p->constant_expressions[base].expression);
base_script = cn->value;
if (base_script.is_null()) {
_set_error("Constant is not a class: " + base, p_class->line);
return;
}
break;
}
p = p->owner;
}
if (base_script.is_valid()) {
String ident = base;
for (int i = extend_iter; i < p_class->extends_class.size(); i++) {
String subclass = p_class->extends_class[i];
ident += ("." + subclass);
if (base_script->get_subclasses().has(subclass)) {
base_script = base_script->get_subclasses()[subclass];
} else if (base_script->get_constants().has(subclass)) {
Ref<GDScript> new_base_class = base_script->get_constants()[subclass];
if (new_base_class.is_null()) {
_set_error("Constant is not a class: " + ident, p_class->line);
return;
}
base_script = new_base_class;
} else {
_set_error("Could not find subclass: " + ident, p_class->line);
return;
}
}
script = base_script;
} else if (!base_class) {
if (p_class->extends_class.size() > 1) {
_set_error("Invalid inheritance (unknown class + subclasses)", p_class->line);
return;
}
//if not found, try engine classes
if (!GDScriptLanguage::get_singleton()->get_global_map().has(base)) {
_set_error("Unknown class: '" + base + "'", p_class->line);
return;
}
native = base;
}
}
if (base_class) {
p_class->base_type.has_type = true;
p_class->base_type.kind = DataType::CLASS;
p_class->base_type.class_type = base_class;
} else if (script.is_valid()) {
p_class->base_type.has_type = true;
p_class->base_type.kind = DataType::GDSCRIPT;
p_class->base_type.script_type = script;
p_class->base_type.native_type = script->get_instance_base_type();
} else if (native != StringName()) {
p_class->base_type.has_type = true;
p_class->base_type.kind = DataType::NATIVE;
p_class->base_type.native_type = native;
} else {
_set_error("Could not determine inheritance", p_class->line);
return;
}
} else {
// without extends, implicitly extend Reference
p_class->base_type.has_type = true;
p_class->base_type.kind = DataType::NATIVE;
p_class->base_type.native_type = "Reference";
}
// Recursively determine subclasses
for (int i = 0; i < p_class->subclasses.size(); i++) {
_determine_inheritance(p_class->subclasses[i]);
}
}
String GDScriptParser::DataType::to_string() const {
if (!has_type) return "var";
switch (kind) {
case BUILTIN: {
if (builtin_type == Variant::NIL) return "null";
return Variant::get_type_name(builtin_type);
} break;
case NATIVE: {
if (is_meta_type) {
return "GDScriptNativeClass";
}
return native_type.operator String();
} break;
case GDSCRIPT: {
Ref<GDScript> gds = script_type;
const String &gds_class = gds->get_script_class_name();
if (!gds_class.empty()) {
return gds_class;
}
} // fallthrough
case SCRIPT: {
if (is_meta_type) {
return script_type->get_class_name().operator String();
}
String name = script_type->get_name();
if (name != String()) {
return name;
}
name = script_type->get_path().get_file();
if (name != String()) {
return name;
}
return native_type.operator String();
} break;
case CLASS: {
ERR_FAIL_COND_V(!class_type, String());
if (is_meta_type) {
return "GDScript";
}
if (class_type->name == StringName()) {
return "self";
}
return class_type->name.operator String();
} break;
case UNRESOLVED: {
} break;
}
return "Unresolved";
}
bool GDScriptParser::_parse_type(DataType &r_type, bool p_can_be_void) {
tokenizer->advance();
r_type.has_type = true;
bool finished = false;
bool can_index = false;
String full_name;
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
completion_cursor = StringName();
completion_type = COMPLETION_TYPE_HINT;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_argument = 0;
completion_block = current_block;
completion_found = true;
completion_ident_is_call = p_can_be_void;
tokenizer->advance();
}
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_PR_VOID: {
if (!p_can_be_void) {
return false;
}
r_type.kind = DataType::BUILTIN;
r_type.builtin_type = Variant::NIL;
} break;
case GDScriptTokenizer::TK_BUILT_IN_TYPE: {
r_type.builtin_type = tokenizer->get_token_type();
if (tokenizer->get_token_type() == Variant::OBJECT) {
r_type.kind = DataType::NATIVE;
r_type.native_type = "Object";
} else {
r_type.kind = DataType::BUILTIN;
}
} break;
case GDScriptTokenizer::TK_IDENTIFIER: {
r_type.native_type = tokenizer->get_token_identifier();
if (ClassDB::class_exists(r_type.native_type) || ClassDB::class_exists("_" + r_type.native_type.operator String())) {
r_type.kind = DataType::NATIVE;
} else {
r_type.kind = DataType::UNRESOLVED;
can_index = true;
full_name = r_type.native_type;
}
} break;
default: {
return false;
}
}
tokenizer->advance();
if (tokenizer->get_token() == GDScriptTokenizer::TK_CURSOR) {
completion_cursor = r_type.native_type;
completion_type = COMPLETION_TYPE_HINT;
completion_class = current_class;
completion_function = current_function;
completion_line = tokenizer->get_token_line();
completion_argument = 0;
completion_block = current_block;
completion_found = true;
completion_ident_is_call = p_can_be_void;
tokenizer->advance();
}
if (can_index) {
while (!finished) {
switch (tokenizer->get_token()) {
case GDScriptTokenizer::TK_PERIOD: {
if (!can_index) {
_set_error("Unexpected '.'.");
return false;
}
can_index = false;
tokenizer->advance();
} break;
case GDScriptTokenizer::TK_IDENTIFIER: {
if (can_index) {
_set_error("Unexpected identifier.");
return false;
}
StringName id;
bool has_completion = _get_completable_identifier(COMPLETION_TYPE_HINT_INDEX, id);
if (id == StringName()) {
id = "@temp";
}
full_name += "." + id.operator String();
can_index = true;
if (has_completion) {
completion_cursor = full_name;
}
} break;
default: {
finished = true;
} break;
}
}
if (tokenizer->get_token(-1) == GDScriptTokenizer::TK_PERIOD) {
_set_error("Expected subclass identifier.");
return false;
}
r_type.native_type = full_name;
}
return true;
}
GDScriptParser::DataType GDScriptParser::_resolve_type(const DataType &p_source, int p_line) {
if (!p_source.has_type) return p_source;
if (p_source.kind != DataType::UNRESOLVED) return p_source;
Vector<String> full_name = p_source.native_type.operator String().split(".", false);
int name_part = 0;
DataType result;
result.has_type = true;
while (name_part < full_name.size()) {
bool found = false;
StringName id = full_name[name_part];
DataType base_type = result;
ClassNode *p = NULL;
if (name_part == 0) {
if (ScriptServer::is_global_class(id)) {
String script_path = ScriptServer::get_global_class_path(id);
if (script_path == self_path) {
result.kind = DataType::CLASS;
result.class_type = current_class;
} else {
Ref<Script> script = ResourceLoader::load(script_path);
Ref<GDScript> gds = script;
if (gds.is_valid()) {
if (!gds->is_valid()) {
_set_error("Class '" + id + "' could not be fully loaded (script error or cyclic dependency).", p_line);
return DataType();
}
result.kind = DataType::GDSCRIPT;
result.script_type = gds;
} else if (script.is_valid()) {
result.kind = DataType::SCRIPT;
result.script_type = script;
} else {
_set_error("Class '" + id + "' was found in global scope but its script could not be loaded.", p_line);
return DataType();
}
}
name_part++;
continue;
} else {
p = current_class;
}
} else if (base_type.kind == DataType::CLASS) {
p = base_type.class_type;
}
while (p) {
if (p->constant_expressions.has(id)) {
if (p->constant_expressions[id].expression->type != Node::TYPE_CONSTANT) {
_set_error("Parser bug: unresolved constant.", p_line);
ERR_FAIL_V(result);
}
const ConstantNode *cn = static_cast<const ConstantNode *>(p->constant_expressions[id].expression);
Ref<GDScript> gds = cn->value;
if (gds.is_valid()) {
result.kind = DataType::GDSCRIPT;
result.script_type = gds;
found = true;
} else {
Ref<Script> scr = cn->value;
if (scr.is_valid()) {
result.kind = DataType::SCRIPT;
result.script_type = scr;
found = true;
}
}
break;
}
// Inner classes
ClassNode *outer_class = p;
while (outer_class) {
if (outer_class->name == id) {
found = true;
result.kind = DataType::CLASS;
result.class_type = outer_class;
break;
}
for (int i = 0; i < outer_class->subclasses.size(); i++) {
if (outer_class->subclasses[i] == p) {
continue;
}
if (outer_class->subclasses[i]->name == id) {
found = true;
result.kind = DataType::CLASS;
result.class_type = outer_class->subclasses[i];
break;
}
}
if (found) {
break;
}
outer_class = outer_class->owner;
}
if (!found && p->base_type.kind == DataType::CLASS) {
p = p->base_type.class_type;
} else {
base_type = p->base_type;
break;
}
}
// Still look for class constants in parent script
if (!found && (base_type.kind == DataType::GDSCRIPT || base_type.kind == DataType::SCRIPT)) {
Ref<Script> scr = base_type.script_type;
ERR_FAIL_COND_V(scr.is_null(), result);
Map<StringName, Variant> constants;
scr->get_constants(&constants);
if (constants.has(id)) {
Ref<GDScript> gds = constants[id];
if (gds.is_valid()) {
result.kind = DataType::GDSCRIPT;
result.script_type = gds;
found = true;
} else {
Ref<Script> scr = constants[id];
if (scr.is_valid()) {
result.kind = DataType::SCRIPT;
result.script_type = scr;
found = true;
}
}
}
}
if (!found && !for_completion) {
String base;
if (name_part == 0) {
base = "self";
} else {
base = result.to_string();
}
_set_error("Identifier '" + String(id) + "' is not a valid type (not a script or class), or could not be found on base '" +
base + "'.",
p_line);
return DataType();
}
name_part++;
}
return result;
}
GDScriptParser::DataType GDScriptParser::_type_from_variant(const Variant &p_value) const {
DataType result;
result.has_type = true;
result.is_constant = true;
result.kind = DataType::BUILTIN;
result.builtin_type = p_value.get_type();
if (result.builtin_type == Variant::OBJECT) {
Object *obj = p_value.operator Object *();
if (!obj) {
return DataType();
}
result.native_type = obj->get_class_name();
Ref<Script> scr = p_value;
if (scr.is_valid()) {
result.is_meta_type = true;
} else {
result.is_meta_type = false;
scr = obj->get_script();
}
if (scr.is_valid()) {
result.script_type = scr;
Ref<GDScript> gds = scr;
if (gds.is_valid()) {
result.kind = DataType::GDSCRIPT;
} else {
result.kind = DataType::SCRIPT;
}
result.native_type = scr->get_instance_base_type();
} else {
result.kind = DataType::NATIVE;
}
}
return result;
}
GDScriptParser::DataType GDScriptParser::_type_from_property(const PropertyInfo &p_property, bool p_nil_is_variant) const {
DataType ret;
if (p_property.type == Variant::NIL && (p_nil_is_variant || (p_property.usage & PROPERTY_USAGE_NIL_IS_VARIANT))) {
// Variant
return ret;
}
ret.has_type = true;
ret.builtin_type = p_property.type;
if (p_property.type == Variant::OBJECT) {
ret.kind = DataType::NATIVE;
ret.native_type = p_property.class_name == StringName() ? "Object" : p_property.class_name;
} else {
ret.kind = DataType::BUILTIN;
}
return ret;
}
GDScriptParser::DataType GDScriptParser::_type_from_gdtype(const GDScriptDataType &p_gdtype) const {
DataType result;
if (!p_gdtype.has_type) {
return result;
}
result.has_type = true;
result.builtin_type = p_gdtype.builtin_type;
result.native_type = p_gdtype.native_type;
result.script_type = p_gdtype.script_type;
switch (p_gdtype.kind) {
case GDScriptDataType::BUILTIN: {
result.kind = DataType::BUILTIN;
} break;
case GDScriptDataType::NATIVE: {
result.kind = DataType::NATIVE;
} break;
case GDScriptDataType::GDSCRIPT: {
result.kind = DataType::GDSCRIPT;
} break;
case GDScriptDataType::SCRIPT: {
result.kind = DataType::SCRIPT;
} break;
}
return result;
}
GDScriptParser::DataType GDScriptParser::_get_operation_type(const Variant::Operator p_op, const DataType &p_a, const DataType &p_b, bool &r_valid) const {
if (!p_a.has_type || !p_b.has_type) {
r_valid = true;
return DataType();
}
Variant::Type a_type = p_a.kind == DataType::BUILTIN ? p_a.builtin_type : Variant::OBJECT;
Variant::Type b_type = p_b.kind == DataType::BUILTIN ? p_b.builtin_type : Variant::OBJECT;
Variant a;
REF a_ref;
if (a_type == Variant::OBJECT) {
a_ref.instance();
a = a_ref;
} else {
Variant::CallError err;
a = Variant::construct(a_type, NULL, 0, err);
if (err.error != Variant::CallError::CALL_OK) {
r_valid = false;
return DataType();
}
}
Variant b;
REF b_ref;
if (b_type == Variant::OBJECT) {
b_ref.instance();
b = b_ref;
} else {
Variant::CallError err;
b = Variant::construct(b_type, NULL, 0, err);
if (err.error != Variant::CallError::CALL_OK) {
r_valid = false;
return DataType();
}
}
// Avoid division by zero
if (a_type == Variant::INT || a_type == Variant::REAL) {
Variant::evaluate(Variant::OP_ADD, a, 1, a, r_valid);
}
if (b_type == Variant::INT || b_type == Variant::REAL) {
Variant::evaluate(Variant::OP_ADD, b, 1, b, r_valid);
}
if (a_type == Variant::STRING && b_type != Variant::ARRAY) {
a = "%s"; // Work around for formatting operator (%)
}
Variant ret;
Variant::evaluate(p_op, a, b, ret, r_valid);
if (r_valid) {
return _type_from_variant(ret);
}
return DataType();
}
Variant::Operator GDScriptParser::_get_variant_operation(const OperatorNode::Operator &p_op) const {
switch (p_op) {
case OperatorNode::OP_NEG: {
return Variant::OP_NEGATE;
} break;
case OperatorNode::OP_POS: {
return Variant::OP_POSITIVE;
} break;
case OperatorNode::OP_NOT: {
return Variant::OP_NOT;
} break;
case OperatorNode::OP_BIT_INVERT: {
return Variant::OP_BIT_NEGATE;
} break;
case OperatorNode::OP_IN: {
return Variant::OP_IN;
} break;
case OperatorNode::OP_EQUAL: {
return Variant::OP_EQUAL;
} break;
case OperatorNode::OP_NOT_EQUAL: {
return Variant::OP_NOT_EQUAL;
} break;
case OperatorNode::OP_LESS: {
return Variant::OP_LESS;
} break;
case OperatorNode::OP_LESS_EQUAL: {
return Variant::OP_LESS_EQUAL;
} break;
case OperatorNode::OP_GREATER: {
return Variant::OP_GREATER;
} break;
case OperatorNode::OP_GREATER_EQUAL: {
return Variant::OP_GREATER_EQUAL;
} break;
case OperatorNode::OP_AND: {
return Variant::OP_AND;
} break;
case OperatorNode::OP_OR: {
return Variant::OP_OR;
} break;
case OperatorNode::OP_ASSIGN_ADD:
case OperatorNode::OP_ADD: {
return Variant::OP_ADD;
} break;
case OperatorNode::OP_ASSIGN_SUB:
case OperatorNode::OP_SUB: {
return Variant::OP_SUBTRACT;
} break;
case OperatorNode::OP_ASSIGN_MUL:
case OperatorNode::OP_MUL: {
return Variant::OP_MULTIPLY;
} break;
case OperatorNode::OP_ASSIGN_DIV:
case OperatorNode::OP_DIV: {
return Variant::OP_DIVIDE;
} break;
case OperatorNode::OP_ASSIGN_MOD:
case OperatorNode::OP_MOD: {
return Variant::OP_MODULE;
} break;
case OperatorNode::OP_ASSIGN_BIT_AND:
case OperatorNode::OP_BIT_AND: {
return Variant::OP_BIT_AND;
} break;
case OperatorNode::OP_ASSIGN_BIT_OR:
case OperatorNode::OP_BIT_OR: {
return Variant::OP_BIT_OR;
} break;
case OperatorNode::OP_ASSIGN_BIT_XOR:
case OperatorNode::OP_BIT_XOR: {
return Variant::OP_BIT_XOR;
} break;
case OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case OperatorNode::OP_SHIFT_LEFT: {
return Variant::OP_SHIFT_LEFT;
}
case OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case OperatorNode::OP_SHIFT_RIGHT: {
return Variant::OP_SHIFT_RIGHT;
}
default: {
return Variant::OP_MAX;
} break;
}
}
bool GDScriptParser::_is_type_compatible(const DataType &p_container, const DataType &p_expression, bool p_allow_implicit_conversion) const {
// Ignore for completion
if (!check_types || for_completion) {
return true;
}
// Can't test if not all have type
if (!p_container.has_type || !p_expression.has_type) {
return true;
}
// Should never get here unresolved
ERR_FAIL_COND_V(p_container.kind == DataType::UNRESOLVED, false);
ERR_FAIL_COND_V(p_expression.kind == DataType::UNRESOLVED, false);
if (p_container.kind == DataType::BUILTIN && p_expression.kind == DataType::BUILTIN) {
bool valid = p_container.builtin_type == p_expression.builtin_type;
if (p_allow_implicit_conversion) {
valid = valid || Variant::can_convert_strict(p_expression.builtin_type, p_container.builtin_type);
}
return valid;
}
if (p_container.kind == DataType::BUILTIN && p_container.builtin_type == Variant::OBJECT) {
// Object built-in is a special case, it's compatible with any object and with null
if (p_expression.kind == DataType::BUILTIN && p_expression.builtin_type == Variant::NIL) {
return true;
}
if (p_expression.kind == DataType::BUILTIN) {
return false;
}
// If it's not a built-in, must be an object
return true;
}
if (p_container.kind == DataType::BUILTIN || (p_expression.kind == DataType::BUILTIN && p_expression.builtin_type != Variant::NIL)) {
// Can't mix built-ins with objects
return false;
}
// From now on everything is objects, check polymorphism
// The container must be the same class or a superclass of the expression
if (p_expression.kind == DataType::BUILTIN && p_expression.builtin_type == Variant::NIL) {
// Null can be assigned to object types
return true;
}
StringName expr_native;
Ref<Script> expr_script;
ClassNode *expr_class = NULL;
switch (p_expression.kind) {
case DataType::NATIVE: {
if (p_container.kind != DataType::NATIVE) {
// Non-native type can't be a superclass of a native type
return false;
}
if (p_expression.is_meta_type) {
expr_native = GDScriptNativeClass::get_class_static();
} else {
expr_native = p_expression.native_type;
}
} break;
case DataType::SCRIPT:
case DataType::GDSCRIPT: {
if (p_container.kind == DataType::CLASS) {
// This cannot be resolved without cyclic dependencies, so just bail out
return false;
}
if (p_expression.is_meta_type) {
expr_native = p_expression.script_type->get_class_name();
} else {
expr_script = p_expression.script_type;
expr_native = expr_script->get_instance_base_type();
}
} break;
case DataType::CLASS: {
if (p_expression.is_meta_type) {
expr_native = GDScript::get_class_static();
} else {
expr_class = p_expression.class_type;
ClassNode *base = expr_class;
while (base->base_type.kind == DataType::CLASS) {
base = base->base_type.class_type;
}
expr_native = base->base_type.native_type;
expr_script = base->base_type.script_type;
}
} break;
case DataType::BUILTIN: // Already handled above
case DataType::UNRESOLVED: // Not allowed, see above
break;
}
switch (p_container.kind) {
case DataType::NATIVE: {
if (p_container.is_meta_type) {
return ClassDB::is_parent_class(expr_native, GDScriptNativeClass::get_class_static());
} else {
return ClassDB::is_parent_class(expr_native, p_container.native_type);
}
} break;
case DataType::SCRIPT:
case DataType::GDSCRIPT: {
if (p_container.is_meta_type) {
return ClassDB::is_parent_class(expr_native, GDScript::get_class_static());
}
if (expr_class == head && p_container.script_type->get_path() == self_path) {
// Special case: container is self script and expression is self
return true;
}
while (expr_script.is_valid()) {
if (expr_script == p_container.script_type) {
return true;
}
expr_script = expr_script->get_base_script();
}
return false;
} break;
case DataType::CLASS: {
if (p_container.is_meta_type) {
return ClassDB::is_parent_class(expr_native, GDScript::get_class_static());
}
if (p_container.class_type == head && expr_script.is_valid() && expr_script->get_path() == self_path) {
// Special case: container is self and expression is self script
return true;
}
while (expr_class) {
if (expr_class == p_container.class_type) {
return true;
}
expr_class = expr_class->base_type.class_type;
}
return false;
} break;
case DataType::BUILTIN: // Already handled above
case DataType::UNRESOLVED: // Not allowed, see above
break;
}
return false;
}
GDScriptParser::DataType GDScriptParser::_reduce_node_type(Node *p_node) {
if (p_node->get_datatype().has_type) {
return p_node->get_datatype();
}
DataType node_type;
switch (p_node->type) {
case Node::TYPE_CONSTANT: {
node_type = _type_from_variant(static_cast<ConstantNode *>(p_node)->value);
} break;
case Node::TYPE_TYPE: {
TypeNode *tn = static_cast<TypeNode *>(p_node);
node_type.has_type = true;
node_type.is_meta_type = true;
node_type.kind = DataType::BUILTIN;
node_type.builtin_type = tn->vtype;
} break;
case Node::TYPE_ARRAY: {
node_type.has_type = true;
node_type.kind = DataType::BUILTIN;
node_type.builtin_type = Variant::ARRAY;
#ifdef DEBUG_ENABLED
// Check stuff inside the array
ArrayNode *an = static_cast<ArrayNode *>(p_node);
for (int i = 0; i < an->elements.size(); i++) {
_reduce_node_type(an->elements[i]);
}
#endif // DEBUG_ENABLED
} break;
case Node::TYPE_DICTIONARY: {
node_type.has_type = true;
node_type.kind = DataType::BUILTIN;
node_type.builtin_type = Variant::DICTIONARY;
#ifdef DEBUG_ENABLED
// Check stuff inside the dictionarty
DictionaryNode *dn = static_cast<DictionaryNode *>(p_node);
for (int i = 0; i < dn->elements.size(); i++) {
_reduce_node_type(dn->elements[i].key);
_reduce_node_type(dn->elements[i].value);
}
#endif // DEBUG_ENABLED
} break;
case Node::TYPE_SELF: {
node_type.has_type = true;
node_type.kind = DataType::CLASS;
node_type.class_type = current_class;
} break;
case Node::TYPE_IDENTIFIER: {
IdentifierNode *id = static_cast<IdentifierNode *>(p_node);
if (id->declared_block) {
node_type = id->declared_block->variables[id->name]->get_datatype();
id->declared_block->variables[id->name]->usages += 1;
} else if (id->name == "#match_value") {
// It's a special id just for the match statetement, ignore
break;
} else if (current_function && current_function->arguments.find(id->name) >= 0) {
int idx = current_function->arguments.find(id->name);
node_type = current_function->argument_types[idx];
} else {
node_type = _reduce_identifier_type(NULL, id->name, id->line, false);
}
} break;
case Node::TYPE_CAST: {
CastNode *cn = static_cast<CastNode *>(p_node);
DataType source_type = _reduce_node_type(cn->source_node);
cn->cast_type = _resolve_type(cn->cast_type, cn->line);
if (source_type.has_type) {
bool valid = false;
if (check_types) {
if (cn->cast_type.kind == DataType::BUILTIN && source_type.kind == DataType::BUILTIN) {
valid = Variant::can_convert(source_type.builtin_type, cn->cast_type.builtin_type);
}
if (cn->cast_type.kind != DataType::BUILTIN && source_type.kind != DataType::BUILTIN) {
valid = _is_type_compatible(cn->cast_type, source_type) || _is_type_compatible(source_type, cn->cast_type);
}
if (!valid) {
_set_error("Invalid cast. Cannot convert from '" + source_type.to_string() +
"' to '" + cn->cast_type.to_string() + "'.",
cn->line);
return DataType();
}
}
} else {
#ifdef DEBUG_ENABLED
_add_warning(GDScriptWarning::UNSAFE_CAST, cn->line, cn->cast_type.to_string());
#endif // DEBUG_ENABLED
_mark_line_as_unsafe(cn->line);
}
node_type = cn->cast_type;
} break;
case Node::TYPE_OPERATOR: {
OperatorNode *op = static_cast<OperatorNode *>(p_node);
switch (op->op) {
case OperatorNode::OP_CALL:
case OperatorNode::OP_PARENT_CALL: {
node_type = _reduce_function_call_type(op);
} break;
case OperatorNode::OP_YIELD: {
if (op->arguments.size() == 2) {
DataType base_type = _reduce_node_type(op->arguments[0]);
DataType signal_type = _reduce_node_type(op->arguments[1]);
// TODO: Check if signal exists when it's a constant
if (base_type.has_type && base_type.kind == DataType::BUILTIN && base_type.builtin_type != Variant::NIL && base_type.builtin_type != Variant::OBJECT) {
_set_error("First argument of 'yield()' must be an object.", op->line);
return DataType();
}
if (signal_type.has_type && (signal_type.kind != DataType::BUILTIN || signal_type.builtin_type != Variant::STRING)) {
_set_error("Second argument of 'yield()' must be a string.", op->line);
return DataType();
}
}
// yield can return anything
node_type.has_type = false;
} break;
case OperatorNode::OP_IS:
case OperatorNode::OP_IS_BUILTIN: {
if (op->arguments.size() != 2) {
_set_error("Parser bug: binary operation without 2 arguments.", op->line);
ERR_FAIL_V(DataType());
}
DataType value_type = _reduce_node_type(op->arguments[0]);
DataType type_type = _reduce_node_type(op->arguments[1]);
if (check_types && type_type.has_type) {
if (!type_type.is_meta_type && (type_type.kind != DataType::NATIVE || !ClassDB::is_parent_class(type_type.native_type, "Script"))) {
_set_error("Invalid 'is' test: right operand is not a type (not a native type nor a script).", op->line);
return DataType();
}
type_type.is_meta_type = false; // Test the actual type
if (!_is_type_compatible(type_type, value_type) && !_is_type_compatible(value_type, type_type)) {
if (op->op == OperatorNode::OP_IS) {
_set_error("A value of type '" + value_type.to_string() + "' will never be an instance of '" + type_type.to_string() + "'.", op->line);
} else {
_set_error("A value of type '" + value_type.to_string() + "' will never be of type '" + type_type.to_string() + "'.", op->line);
}
return DataType();
}
}
node_type.has_type = true;
node_type.is_constant = true;
node_type.is_meta_type = false;
node_type.kind = DataType::BUILTIN;
node_type.builtin_type = Variant::BOOL;
} break;
// Unary operators
case OperatorNode::OP_NEG:
case OperatorNode::OP_POS:
case OperatorNode::OP_NOT:
case OperatorNode::OP_BIT_INVERT: {
DataType argument_type = _reduce_node_type(op->arguments[0]);
if (!argument_type.has_type) {
break;
}
Variant::Operator var_op = _get_variant_operation(op->op);
bool valid = false;
node_type = _get_operation_type(var_op, argument_type, argument_type, valid);
if (check_types && !valid) {
_set_error("Invalid operand type ('" + argument_type.to_string() +
"') to unary operator '" + Variant::get_operator_name(var_op) + "'.",
op->line, op->column);
return DataType();
}
} break;
// Binary operators
case OperatorNode::OP_IN:
case OperatorNode::OP_EQUAL:
case OperatorNode::OP_NOT_EQUAL:
case OperatorNode::OP_LESS:
case OperatorNode::OP_LESS_EQUAL:
case OperatorNode::OP_GREATER:
case OperatorNode::OP_GREATER_EQUAL:
case OperatorNode::OP_AND:
case OperatorNode::OP_OR:
case OperatorNode::OP_ADD:
case OperatorNode::OP_SUB:
case OperatorNode::OP_MUL:
case OperatorNode::OP_DIV:
case OperatorNode::OP_MOD:
case OperatorNode::OP_SHIFT_LEFT:
case OperatorNode::OP_SHIFT_RIGHT:
case OperatorNode::OP_BIT_AND:
case OperatorNode::OP_BIT_OR:
case OperatorNode::OP_BIT_XOR: {
if (op->arguments.size() != 2) {
_set_error("Parser bug: binary operation without 2 arguments.", op->line);
ERR_FAIL_V(DataType());
}
DataType argument_a_type = _reduce_node_type(op->arguments[0]);
DataType argument_b_type = _reduce_node_type(op->arguments[1]);
if (!argument_a_type.has_type || !argument_b_type.has_type) {
_mark_line_as_unsafe(op->line);
break;
}
Variant::Operator var_op = _get_variant_operation(op->op);
bool valid = false;
node_type = _get_operation_type(var_op, argument_a_type, argument_b_type, valid);
if (check_types && !valid) {
_set_error("Invalid operand types ('" + argument_a_type.to_string() + "' and '" +
argument_b_type.to_string() + "') to operator '" + Variant::get_operator_name(var_op) + "'.",
op->line, op->column);
return DataType();
}
#ifdef DEBUG_ENABLED
if (var_op == Variant::OP_DIVIDE && argument_a_type.has_type && argument_a_type.kind == DataType::BUILTIN && argument_a_type.builtin_type == Variant::INT &&
argument_b_type.has_type && argument_b_type.kind == DataType::BUILTIN && argument_b_type.builtin_type == Variant::INT) {
_add_warning(GDScriptWarning::INTEGER_DIVISION, op->line);
}
#endif // DEBUG_ENABLED
} break;
// Ternary operators
case OperatorNode::OP_TERNARY_IF: {
if (op->arguments.size() != 3) {
_set_error("Parser bug: ternary operation without 3 arguments");
ERR_FAIL_V(DataType());
}
DataType true_type = _reduce_node_type(op->arguments[1]);
DataType false_type = _reduce_node_type(op->arguments[2]);
// If types are equal, then the expression is of the same type
// If they are compatible, return the broader type
if (true_type == false_type || _is_type_compatible(true_type, false_type)) {
node_type = true_type;
} else if (_is_type_compatible(false_type, true_type)) {
node_type = false_type;
} else {
#ifdef DEBUG_ENABLED
_add_warning(GDScriptWarning::INCOMPATIBLE_TERNARY, op->line);
#endif // DEBUG_ENABLED
}
} break;
// Assignment should never happen within an expression
case OperatorNode::OP_ASSIGN:
case OperatorNode::OP_ASSIGN_ADD:
case OperatorNode::OP_ASSIGN_SUB:
case OperatorNode::OP_ASSIGN_MUL:
case OperatorNode::OP_ASSIGN_DIV:
case OperatorNode::OP_ASSIGN_MOD:
case OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case OperatorNode::OP_ASSIGN_BIT_AND:
case OperatorNode::OP_ASSIGN_BIT_OR:
case OperatorNode::OP_ASSIGN_BIT_XOR:
case OperatorNode::OP_INIT_ASSIGN: {
_set_error("Assignment inside expression is not allowed (parser bug?).", op->line);
return DataType();
} break;
case OperatorNode::OP_INDEX_NAMED: {
if (op->arguments.size() != 2) {
_set_error("Parser bug: named index with invalid arguments.", op->line);
ERR_FAIL_V(DataType());
}
if (op->arguments[1]->type != Node::TYPE_IDENTIFIER) {
_set_error("Parser bug: named index without identifier argument.", op->line);
ERR_FAIL_V(DataType());
}
DataType base_type = _reduce_node_type(op->arguments[0]);
IdentifierNode *member_id = static_cast<IdentifierNode *>(op->arguments[1]);
if (base_type.has_type) {
if (check_types && base_type.kind == DataType::BUILTIN) {
// Variant type, just test if it's possible
DataType result;
switch (base_type.builtin_type) {
case Variant::NIL:
case Variant::DICTIONARY: {
result.has_type = false;
} break;
default: {
Variant::CallError err;
Variant temp = Variant::construct(base_type.builtin_type, NULL, 0, err);
bool valid = false;
Variant res = temp.get(member_id->name.operator String(), &valid);
if (valid) {
result = _type_from_variant(res);
} else if (check_types) {
_set_error("Can't get index '" + String(member_id->name.operator String()) + "' on base '" +
base_type.to_string() + "'.",
op->line);
return DataType();
}
} break;
}
result.is_constant = false;
node_type = result;
} else {
node_type = _reduce_identifier_type(&base_type, member_id->name, op->line, true);
#ifdef DEBUG_ENABLED
if (!node_type.has_type) {
_add_warning(GDScriptWarning::UNSAFE_PROPERTY_ACCESS, op->line, member_id->name.operator String(), base_type.to_string());
}
#endif // DEBUG_ENABLED
}
} else {
_mark_line_as_unsafe(op->line);
}
if (error_set) {
return DataType();
}
} break;
case OperatorNode::OP_INDEX: {
if (op->arguments[1]->type == Node::TYPE_CONSTANT) {
ConstantNode *cn = static_cast<ConstantNode *>(op->arguments[1]);
if (cn->value.get_type() == Variant::STRING) {
// Treat this as named indexing
IdentifierNode *id = alloc_node<IdentifierNode>();
id->name = cn->value.operator StringName();
op->op = OperatorNode::OP_INDEX_NAMED;
op->arguments.write[1] = id;
return _reduce_node_type(op);
}
}
DataType base_type = _reduce_node_type(op->arguments[0]);
DataType index_type = _reduce_node_type(op->arguments[1]);
if (!base_type.has_type) {
_mark_line_as_unsafe(op->line);
break;
}
if (check_types && index_type.has_type) {
if (base_type.kind == DataType::BUILTIN) {
// Check if indexing is valid
bool error = index_type.kind != DataType::BUILTIN && base_type.builtin_type != Variant::DICTIONARY;
if (!error) {
switch (base_type.builtin_type) {
// Expect int or real as index
case Variant::POOL_BYTE_ARRAY:
case Variant::POOL_COLOR_ARRAY:
case Variant::POOL_INT_ARRAY:
case Variant::POOL_REAL_ARRAY:
case Variant::POOL_STRING_ARRAY:
case Variant::POOL_VECTOR2_ARRAY:
case Variant::POOL_VECTOR3_ARRAY:
case Variant::ARRAY:
case Variant::STRING: {
error = index_type.builtin_type != Variant::INT && index_type.builtin_type != Variant::REAL;
} break;
// Expect String only
case Variant::RECT2:
case Variant::PLANE:
case Variant::QUAT:
case Variant::AABB:
case Variant::OBJECT: {
error = index_type.builtin_type != Variant::STRING;
} break;
// Expect String or number
case Variant::VECTOR2:
case Variant::VECTOR3:
case Variant::TRANSFORM2D:
case Variant::BASIS:
case Variant::TRANSFORM: {
error = index_type.builtin_type != Variant::INT && index_type.builtin_type != Variant::REAL &&
index_type.builtin_type != Variant::STRING;
} break;
// Expect String or int
case Variant::COLOR: {
error = index_type.builtin_type != Variant::INT && index_type.builtin_type != Variant::STRING;
} break;
default: {}
}
}
if (error) {
_set_error("Invalid index type (" + index_type.to_string() + ") for base '" + base_type.to_string() + "'.",
op->line);
return DataType();
}
if (op->arguments[1]->type == GDScriptParser::Node::TYPE_CONSTANT) {
ConstantNode *cn = static_cast<ConstantNode *>(op->arguments[1]);
// Index is a constant, just try it if possible
switch (base_type.builtin_type) {
// Arrays/string have variable indexing, can't test directly
case Variant::STRING:
case Variant::ARRAY:
case Variant::DICTIONARY:
case Variant::POOL_BYTE_ARRAY:
case Variant::POOL_COLOR_ARRAY:
case Variant::POOL_INT_ARRAY:
case Variant::POOL_REAL_ARRAY:
case Variant::POOL_STRING_ARRAY:
case Variant::POOL_VECTOR2_ARRAY:
case Variant::POOL_VECTOR3_ARRAY: {
break;
}
default: {
Variant::CallError err;
Variant temp = Variant::construct(base_type.builtin_type, NULL, 0, err);
bool valid = false;
Variant res = temp.get(cn->value, &valid);
if (valid) {
node_type = _type_from_variant(res);
node_type.is_constant = false;
} else if (check_types) {
_set_error("Can't get index '" + String(cn->value) + "' on base '" +
base_type.to_string() + "'.",
op->line);
return DataType();
}
} break;
}
} else {
_mark_line_as_unsafe(op->line);
}
} else if (!for_completion && (index_type.kind != DataType::BUILTIN || index_type.builtin_type != Variant::STRING)) {
_set_error("Only strings can be used as index in the base type '" + base_type.to_string() + "'.", op->line);
return DataType();
}
}
if (check_types && !node_type.has_type) {
// Can infer indexing type for some variant types
DataType result;
result.has_type = true;
result.kind = DataType::BUILTIN;
switch (base_type.builtin_type) {
// Can't index at all
case Variant::NIL:
case Variant::BOOL:
case Variant::INT:
case Variant::REAL:
case Variant::NODE_PATH:
case Variant::_RID: {
_set_error("Can't index on a value of type '" + base_type.to_string() + "'.", op->line);
return DataType();
} break;
// Return int
case Variant::POOL_BYTE_ARRAY:
case Variant::POOL_INT_ARRAY: {
result.builtin_type = Variant::INT;
} break;
// Return real
case Variant::POOL_REAL_ARRAY:
case Variant::VECTOR2:
case Variant::VECTOR3:
case Variant::QUAT: {
result.builtin_type = Variant::REAL;
} break;
// Return color
case Variant::POOL_COLOR_ARRAY: {
result.builtin_type = Variant::COLOR;
} break;
// Return string
case Variant::POOL_STRING_ARRAY:
case Variant::STRING: {
result.builtin_type = Variant::STRING;
} break;
// Return Vector2
case Variant::POOL_VECTOR2_ARRAY:
case Variant::TRANSFORM2D:
case Variant::RECT2: {
result.builtin_type = Variant::VECTOR2;
} break;
// Return Vector3
case Variant::POOL_VECTOR3_ARRAY:
case Variant::AABB:
case Variant::BASIS: {
result.builtin_type = Variant::VECTOR3;
} break;
// Depends on the index
case Variant::TRANSFORM:
case Variant::PLANE:
case Variant::COLOR:
default: {
result.has_type = false;
} break;
}
node_type = result;
}
} break;
default: {
_set_error("Parser bug: unhandled operation.", op->line);
ERR_FAIL_V(DataType());
}
}
} break;
default: {}
}
p_node->set_datatype(_resolve_type(node_type, p_node->line));
return node_type;
}
bool GDScriptParser::_get_function_signature(DataType &p_base_type, const StringName &p_function, DataType &r_return_type, List<DataType> &r_arg_types, int &r_default_arg_count, bool &r_static, bool &r_vararg) const {
r_static = false;
r_default_arg_count = 0;
DataType original_type = p_base_type;
ClassNode *base = NULL;
FunctionNode *callee = NULL;
if (p_base_type.kind == DataType::CLASS) {
base = p_base_type.class_type;
}
// Look up the current file (parse tree)
while (!callee && base) {
for (int i = 0; i < base->static_functions.size(); i++) {
FunctionNode *func = base->static_functions[i];
if (p_function == func->name) {
r_static = true;
callee = func;
break;
}
}
if (!callee && !p_base_type.is_meta_type) {
for (int i = 0; i < base->functions.size(); i++) {
FunctionNode *func = base->functions[i];
if (p_function == func->name) {
callee = func;
break;
}
}
}
p_base_type = base->base_type;
if (p_base_type.kind == DataType::CLASS) {
base = p_base_type.class_type;
} else {
break;
}
}
if (callee) {
r_return_type = callee->get_datatype();
for (int i = 0; i < callee->argument_types.size(); i++) {
r_arg_types.push_back(callee->argument_types[i]);
}
r_default_arg_count = callee->default_values.size();
return true;
}
// Nothing in current file, check parent script
Ref<GDScript> base_gdscript;
Ref<Script> base_script;
StringName native;
if (p_base_type.kind == DataType::GDSCRIPT) {
base_gdscript = p_base_type.script_type;
if (base_gdscript.is_null() || !base_gdscript->is_valid()) {
// GDScript wasn't properly compíled, don't bother trying
return false;
}
} else if (p_base_type.kind == DataType::SCRIPT) {
base_script = p_base_type.script_type;
} else if (p_base_type.kind == DataType::NATIVE) {
native = p_base_type.native_type;
}
while (base_gdscript.is_valid()) {
native = base_gdscript->get_instance_base_type();
Map<StringName, GDScriptFunction *> funcs = base_gdscript->get_member_functions();
if (funcs.has(p_function)) {
GDScriptFunction *f = funcs[p_function];
r_static = f->is_static();
r_default_arg_count = f->get_default_argument_count();
r_return_type = _type_from_gdtype(f->get_return_type());
for (int i = 0; i < f->get_argument_count(); i++) {
r_arg_types.push_back(_type_from_gdtype(f->get_argument_type(i)));
}
return true;
}
base_gdscript = base_gdscript->get_base_script();
}
while (base_script.is_valid()) {
native = base_script->get_instance_base_type();
MethodInfo mi = base_script->get_method_info(p_function);
if (!(mi == MethodInfo())) {
r_return_type = _type_from_property(mi.return_val, false);
r_default_arg_count = mi.default_arguments.size();
for (List<PropertyInfo>::Element *E = mi.arguments.front(); E; E = E->next()) {
r_arg_types.push_back(_type_from_property(E->get()));
}
return true;
}
base_script = base_script->get_base_script();
}
if (native == StringName()) {
// Empty native class, might happen in some Script implementations
// Just ignore it
return false;
}
#ifdef DEBUG_METHODS_ENABLED
// Only native remains
if (!ClassDB::class_exists(native)) {
native = "_" + native.operator String();
}
if (!ClassDB::class_exists(native)) {
if (!check_types) return false;
ERR_EXPLAIN("Parser bug: Class '" + String(native) + "' not found.");
ERR_FAIL_V(false);
}
MethodBind *method = ClassDB::get_method(native, p_function);
if (!method) {
// Try virtual methods
List<MethodInfo> virtuals;
ClassDB::get_virtual_methods(native, &virtuals);
for (const List<MethodInfo>::Element *E = virtuals.front(); E; E = E->next()) {
const MethodInfo &mi = E->get();
if (mi.name == p_function) {
r_default_arg_count = mi.default_arguments.size();
for (const List<PropertyInfo>::Element *pi = mi.arguments.front(); pi; pi = pi->next()) {
r_arg_types.push_back(_type_from_property(pi->get()));
}
r_return_type = _type_from_property(mi.return_val, false);
r_vararg = mi.flags & METHOD_FLAG_VARARG;
return true;
}
}
// If the base is a script, it might be trying to access members of the Script class itself
if (original_type.is_meta_type && !(p_function == "new") && (original_type.kind == DataType::SCRIPT || original_type.kind == DataType::GDSCRIPT)) {
method = ClassDB::get_method(original_type.script_type->get_class_name(), p_function);
if (method) {
r_static = true;
} else {
// Try virtual methods of the script type
virtuals.clear();
ClassDB::get_virtual_methods(original_type.script_type->get_class_name(), &virtuals);
for (const List<MethodInfo>::Element *E = virtuals.front(); E; E = E->next()) {
const MethodInfo &mi = E->get();
if (mi.name == p_function) {
r_default_arg_count = mi.default_arguments.size();
for (const List<PropertyInfo>::Element *pi = mi.arguments.front(); pi; pi = pi->next()) {
r_arg_types.push_back(_type_from_property(pi->get()));
}
r_return_type = _type_from_property(mi.return_val, false);
r_static = true;
r_vararg = mi.flags & METHOD_FLAG_VARARG;
return true;
}
}
return false;
}
} else {
return false;
}
}
r_default_arg_count = method->get_default_argument_count();
r_return_type = _type_from_property(method->get_return_info(), false);
r_vararg = method->is_vararg();
for (int i = 0; i < method->get_argument_count(); i++) {
r_arg_types.push_back(_type_from_property(method->get_argument_info(i)));
}
return true;
#else
return false;
#endif
}
GDScriptParser::DataType GDScriptParser::_reduce_function_call_type(const OperatorNode *p_call) {
if (p_call->arguments.size() < 1) {
_set_error("Parser bug: function call without enough arguments.", p_call->line);
ERR_FAIL_V(DataType());
}
DataType return_type;
List<DataType> arg_types;
int default_args_count = 0;
int arg_count = p_call->arguments.size();
String callee_name;
bool is_vararg = false;
switch (p_call->arguments[0]->type) {
case GDScriptParser::Node::TYPE_TYPE: {
// Built-in constructor, special case
TypeNode *tn = static_cast<TypeNode *>(p_call->arguments[0]);
Vector<DataType> par_types;
par_types.resize(p_call->arguments.size() - 1);
for (int i = 1; i < p_call->arguments.size(); i++) {
par_types.write[i - 1] = _reduce_node_type(p_call->arguments[i]);
}
if (error_set) return DataType();
bool match = false;
List<MethodInfo> constructors;
Variant::get_constructor_list(tn->vtype, &constructors);
PropertyInfo return_type;
for (List<MethodInfo>::Element *E = constructors.front(); E; E = E->next()) {
MethodInfo &mi = E->get();
if (p_call->arguments.size() - 1 < mi.arguments.size() - mi.default_arguments.size()) {
continue;
}
if (p_call->arguments.size() - 1 > mi.arguments.size()) {
continue;
}
bool types_match = true;
for (int i = 0; i < par_types.size(); i++) {
DataType arg_type;
if (mi.arguments[i].type != Variant::NIL) {
arg_type.has_type = true;
arg_type.kind = mi.arguments[i].type == Variant::OBJECT ? DataType::NATIVE : DataType::BUILTIN;
arg_type.builtin_type = mi.arguments[i].type;
arg_type.native_type = mi.arguments[i].class_name;
}
if (!_is_type_compatible(arg_type, par_types[i], true)) {
types_match = false;
break;
} else {
#ifdef DEBUG_ENABLED
if (arg_type.kind == DataType::BUILTIN && arg_type.builtin_type == Variant::INT && par_types[i].kind == DataType::BUILTIN && par_types[i].builtin_type == Variant::REAL) {
_add_warning(GDScriptWarning::NARROWING_CONVERSION, p_call->line, Variant::get_type_name(tn->vtype));
}
if (par_types[i].may_yield && p_call->arguments[i + 1]->type == Node::TYPE_OPERATOR) {
_add_warning(GDScriptWarning::FUNCTION_MAY_YIELD, p_call->line, _find_function_name(static_cast<OperatorNode *>(p_call->arguments[i + 1])));
}
#endif // DEBUG_ENABLED
}
}
if (types_match) {
match = true;
return_type = mi.return_val;
break;
}
}
if (match) {
return _type_from_property(return_type, false);
} else if (check_types) {
String err = "No constructor of '";
err += Variant::get_type_name(tn->vtype);
err += "' matches the signature '";
err += Variant::get_type_name(tn->vtype) + "(";
for (int i = 0; i < par_types.size(); i++) {
if (i > 0) err += ", ";
err += par_types[i].to_string();
}
err += ")'.";
_set_error(err, p_call->line, p_call->column);
return DataType();
}
return DataType();
} break;
case GDScriptParser::Node::TYPE_BUILT_IN_FUNCTION: {
BuiltInFunctionNode *func = static_cast<BuiltInFunctionNode *>(p_call->arguments[0]);
MethodInfo mi = GDScriptFunctions::get_info(func->function);
return_type = _type_from_property(mi.return_val, false);
#ifdef DEBUG_ENABLED
// Check all arguments beforehand to solve warnings
for (int i = 1; i < p_call->arguments.size(); i++) {
_reduce_node_type(p_call->arguments[i]);
}
#endif // DEBUG_ENABLED
// Check arguments
is_vararg = mi.flags & METHOD_FLAG_VARARG;
default_args_count = mi.default_arguments.size();
callee_name = mi.name;
arg_count -= 1;
// Check each argument type
for (List<PropertyInfo>::Element *E = mi.arguments.front(); E; E = E->next()) {
arg_types.push_back(_type_from_property(E->get()));
}
} break;
default: {
if (p_call->op == OperatorNode::OP_CALL && p_call->arguments.size() < 2) {
_set_error("Parser bug: self method call without enough arguments.", p_call->line);
ERR_FAIL_V(DataType());
}
int arg_id = p_call->op == OperatorNode::OP_CALL ? 1 : 0;
if (p_call->arguments[arg_id]->type != Node::TYPE_IDENTIFIER) {
_set_error("Parser bug: invalid function call argument.", p_call->line);
ERR_FAIL_V(DataType());
}
#ifdef DEBUG_ENABLED
// Check all arguments beforehand to solve warnings
for (int i = arg_id + 1; i < p_call->arguments.size(); i++) {
_reduce_node_type(p_call->arguments[i]);
}
#endif // DEBUG_ENABLED
IdentifierNode *func_id = static_cast<IdentifierNode *>(p_call->arguments[arg_id]);
callee_name = func_id->name;
arg_count -= 1 + arg_id;
DataType base_type;
if (p_call->op == OperatorNode::OP_PARENT_CALL) {
base_type = current_class->base_type;
} else {
base_type = _reduce_node_type(p_call->arguments[0]);
}
if (!base_type.has_type || (base_type.kind == DataType::BUILTIN && base_type.builtin_type == Variant::NIL)) {
_mark_line_as_unsafe(p_call->line);
return DataType();
}
if (base_type.kind == DataType::BUILTIN) {
Variant::CallError err;
Variant tmp = Variant::construct(base_type.builtin_type, NULL, 0, err);
if (check_types) {
if (!tmp.has_method(callee_name)) {
_set_error("Method '" + callee_name + "' is not declared on base '" + base_type.to_string() + "'.", p_call->line);
return DataType();
}
default_args_count = Variant::get_method_default_arguments(base_type.builtin_type, callee_name).size();
const Vector<Variant::Type> &var_arg_types = Variant::get_method_argument_types(base_type.builtin_type, callee_name);
for (int i = 0; i < var_arg_types.size(); i++) {
DataType argtype;
if (var_arg_types[i] != Variant::NIL) {
argtype.has_type = true;
argtype.kind = DataType::BUILTIN;
argtype.builtin_type = var_arg_types[i];
}
arg_types.push_back(argtype);
}
}
bool rets = false;
return_type.has_type = true;
return_type.kind = DataType::BUILTIN;
return_type.builtin_type = Variant::get_method_return_type(base_type.builtin_type, callee_name, &rets);
// If the method returns, but it might return any type, (Variant::NIL), pretend we don't know the type.
// At least make sure we know that it returns
if (rets && return_type.builtin_type == Variant::NIL) {
return_type.has_type = false;
}
break;
}
DataType original_type = base_type;
bool is_initializer = callee_name == "new";
bool is_static = false;
bool valid = false;
if (is_initializer && original_type.is_meta_type) {
// Try to check it as initializer
base_type = original_type;
callee_name = "_init";
base_type.is_meta_type = false;
valid = _get_function_signature(base_type, callee_name, return_type, arg_types,
default_args_count, is_static, is_vararg);
return_type = original_type;
return_type.is_meta_type = false;
valid = true; // There's always an initializer, we can asume this is true
}
if (!valid) {
base_type = original_type;
return_type = DataType();
valid = _get_function_signature(base_type, callee_name, return_type, arg_types,
default_args_count, is_static, is_vararg);
}
if (!valid) {
#ifdef DEBUG_ENABLED
if (p_call->arguments[0]->type == Node::TYPE_SELF) {
_set_error("Method '" + callee_name + "' is not declared in the current class.", p_call->line);
return DataType();
}
DataType tmp_type;
valid = _get_member_type(original_type, func_id->name, tmp_type);
if (valid) {
if (tmp_type.is_constant) {
_add_warning(GDScriptWarning::CONSTANT_USED_AS_FUNCTION, p_call->line, callee_name, original_type.to_string());
} else {
_add_warning(GDScriptWarning::PROPERTY_USED_AS_FUNCTION, p_call->line, callee_name, original_type.to_string());
}
}
_add_warning(GDScriptWarning::UNSAFE_METHOD_ACCESS, p_call->line, callee_name, original_type.to_string());
_mark_line_as_unsafe(p_call->line);
#endif // DEBUG_ENABLED
return DataType();
}
#ifdef DEBUG_ENABLED
if (current_function && !for_completion && !is_static && p_call->arguments[0]->type == Node::TYPE_SELF && current_function->_static) {
if (current_function && current_function->_static && p_call->arguments[0]->type == Node::TYPE_SELF) {
_set_error("Can't call non-static function from a static function.", p_call->line);
return DataType();
}
}
if (check_types && !is_static && !is_initializer && base_type.is_meta_type) {
_set_error("Non-static function '" + String(callee_name) + "' can only be called from an instance.", p_call->line);
return DataType();
}
// Check signal emission for warnings
if (callee_name == "emit_signal" && p_call->op == OperatorNode::OP_CALL && p_call->arguments[0]->type == Node::TYPE_SELF && p_call->arguments.size() >= 3 && p_call->arguments[2]->type == Node::TYPE_CONSTANT) {
ConstantNode *sig = static_cast<ConstantNode *>(p_call->arguments[2]);
String emitted = sig->value.get_type() == Variant::STRING ? sig->value.operator String() : "";
for (int i = 0; i < current_class->_signals.size(); i++) {
if (current_class->_signals[i].name == emitted) {
current_class->_signals.write[i].emissions += 1;
break;
}
}
}
#endif // DEBUG_ENABLED
} break;
}
#ifdef DEBUG_ENABLED
if (!check_types) {
return return_type;
}
if (arg_count < arg_types.size() - default_args_count) {
_set_error("Too few arguments for '" + callee_name + "()' call. Expected at least " + itos(arg_types.size() - default_args_count) + ".", p_call->line);
return return_type;
}
if (!is_vararg && arg_count > arg_types.size()) {
_set_error("Too many arguments for '" + callee_name + "()' call. Expected at most " + itos(arg_types.size()) + ".", p_call->line);
return return_type;
}
int arg_diff = p_call->arguments.size() - arg_count;
for (int i = arg_diff; i < p_call->arguments.size(); i++) {
DataType par_type = _reduce_node_type(p_call->arguments[i]);
if ((i - arg_diff) >= arg_types.size()) {
continue;
}
DataType arg_type = arg_types[i - arg_diff];
if (!par_type.has_type) {
_mark_line_as_unsafe(p_call->line);
if (par_type.may_yield && p_call->arguments[i]->type == Node::TYPE_OPERATOR) {
_add_warning(GDScriptWarning::FUNCTION_MAY_YIELD, p_call->line, _find_function_name(static_cast<OperatorNode *>(p_call->arguments[i])));
}
} else if (!_is_type_compatible(arg_types[i - arg_diff], par_type, true)) {
// Supertypes are acceptable for dynamic compliance
if (!_is_type_compatible(par_type, arg_types[i - arg_diff])) {
_set_error("At '" + callee_name + "()' call, argument " + itos(i - arg_diff + 1) + ". Assigned type (" +
par_type.to_string() + ") doesn't match the function argument's type (" +
arg_types[i - arg_diff].to_string() + ").",
p_call->line);
return DataType();
} else {
_mark_line_as_unsafe(p_call->line);
}
} else {
if (arg_type.kind == DataType::BUILTIN && arg_type.builtin_type == Variant::INT && par_type.kind == DataType::BUILTIN && par_type.builtin_type == Variant::REAL) {
_add_warning(GDScriptWarning::NARROWING_CONVERSION, p_call->line, callee_name);
}
}
}
#endif // DEBUG_ENABLED
return return_type;
}
bool GDScriptParser::_get_member_type(const DataType &p_base_type, const StringName &p_member, DataType &r_member_type) const {
DataType base_type = p_base_type;
// Check classes in current file
ClassNode *base = NULL;
if (base_type.kind == DataType::CLASS) {
base = base_type.class_type;
}
while (base) {
if (base->constant_expressions.has(p_member)) {
r_member_type = base->constant_expressions[p_member].expression->get_datatype();
return true;
}
if (!base_type.is_meta_type) {
for (int i = 0; i < base->variables.size(); i++) {
if (base->variables[i].identifier == p_member) {
r_member_type = base->variables[i].data_type;
base->variables.write[i].usages += 1;
return true;
}
}
} else {
for (int i = 0; i < base->subclasses.size(); i++) {
ClassNode *c = base->subclasses[i];
if (c->name == p_member) {
DataType class_type;
class_type.has_type = true;
class_type.is_constant = true;
class_type.is_meta_type = true;
class_type.kind = DataType::CLASS;
class_type.class_type = c;
r_member_type = class_type;
return true;
}
}
}
base_type = base->base_type;
if (base_type.kind == DataType::CLASS) {
base = base_type.class_type;
} else {
break;
}
}
Ref<GDScript> gds;
if (base_type.kind == DataType::GDSCRIPT) {
gds = base_type.script_type;
if (gds.is_null() || !gds->is_valid()) {
// GDScript wasn't properly compíled, don't bother trying
return false;
}
}
Ref<Script> scr;
if (base_type.kind == DataType::SCRIPT) {
scr = base_type.script_type;
}
StringName native;
if (base_type.kind == DataType::NATIVE) {
native = base_type.native_type;
}
// Check GDScripts
while (gds.is_valid()) {
if (gds->get_constants().has(p_member)) {
Variant c = gds->get_constants()[p_member];
r_member_type = _type_from_variant(c);
return true;
}
if (!base_type.is_meta_type) {
if (gds->get_members().has(p_member)) {
r_member_type = _type_from_gdtype(gds->get_member_type(p_member));
return true;
}
}
native = gds->get_instance_base_type();
if (gds->get_base_script().is_valid()) {
gds = gds->get_base_script();
scr = gds->get_base_script();
bool is_meta = base_type.is_meta_type;
base_type = _type_from_variant(scr.operator Variant());
base_type.is_meta_type = is_meta;
} else {
break;
}
}
// Check other script types
while (scr.is_valid()) {
Map<StringName, Variant> constants;
scr->get_constants(&constants);
if (constants.has(p_member)) {
r_member_type = _type_from_variant(constants[p_member]);
return true;
}
List<PropertyInfo> properties;
scr->get_script_property_list(&properties);
for (List<PropertyInfo>::Element *E = properties.front(); E; E = E->next()) {
if (E->get().name == p_member) {
r_member_type = _type_from_property(E->get());
return true;
}
}
base_type = _type_from_variant(scr.operator Variant());
native = scr->get_instance_base_type();
scr = scr->get_base_script();
}
if (native == StringName()) {
// Empty native class, might happen in some Script implementations
// Just ignore it
return false;
}
// Check ClassDB
if (!ClassDB::class_exists(native)) {
native = "_" + native.operator String();
}
if (!ClassDB::class_exists(native)) {
if (!check_types) return false;
ERR_EXPLAIN("Parser bug: Class '" + String(native) + "' not found.");
ERR_FAIL_V(false);
}
bool valid = false;
ClassDB::get_integer_constant(native, p_member, &valid);
if (valid) {
DataType ct;
ct.has_type = true;
ct.is_constant = true;
ct.kind = DataType::BUILTIN;
ct.builtin_type = Variant::INT;
r_member_type = ct;
return true;
}
if (!base_type.is_meta_type) {
List<PropertyInfo> properties;
ClassDB::get_property_list(native, &properties);
for (List<PropertyInfo>::Element *E = properties.front(); E; E = E->next()) {
if (E->get().name == p_member) {
// Check if a getter exists
StringName getter_name = ClassDB::get_property_getter(native, p_member);
if (getter_name != StringName()) {
// Use the getter return type
#ifdef DEBUG_METHODS_ENABLED
MethodBind *getter_method = ClassDB::get_method(native, getter_name);
if (getter_method) {
r_member_type = _type_from_property(getter_method->get_return_info());
} else {
r_member_type = DataType();
}
#else
r_member_type = DataType();
#endif
} else {
r_member_type = _type_from_property(E->get());
}
return true;
}
}
}
// If the base is a script, it might be trying to access members of the Script class itself
if (p_base_type.is_meta_type && (p_base_type.kind == DataType::SCRIPT || p_base_type.kind == DataType::GDSCRIPT)) {
native = p_base_type.script_type->get_class_name();
ClassDB::get_integer_constant(native, p_member, &valid);
if (valid) {
DataType ct;
ct.has_type = true;
ct.is_constant = true;
ct.kind = DataType::BUILTIN;
ct.builtin_type = Variant::INT;
r_member_type = ct;
return true;
}
List<PropertyInfo> properties;
ClassDB::get_property_list(native, &properties);
for (List<PropertyInfo>::Element *E = properties.front(); E; E = E->next()) {
if (E->get().name == p_member) {
// Check if a getter exists
StringName getter_name = ClassDB::get_property_getter(native, p_member);
if (getter_name != StringName()) {
// Use the getter return type
#ifdef DEBUG_METHODS_ENABLED
MethodBind *getter_method = ClassDB::get_method(native, getter_name);
if (getter_method) {
r_member_type = _type_from_property(getter_method->get_return_info());
} else {
r_member_type = DataType();
}
#else
r_member_type = DataType();
#endif
} else {
r_member_type = _type_from_property(E->get());
}
return true;
}
}
}
return false;
}
GDScriptParser::DataType GDScriptParser::_reduce_identifier_type(const DataType *p_base_type, const StringName &p_identifier, int p_line, bool p_is_indexing) {
if (p_base_type && !p_base_type->has_type) {
return DataType();
}
DataType base_type;
DataType member_type;
if (!p_base_type) {
base_type.has_type = true;
base_type.is_constant = true;
base_type.kind = DataType::CLASS;
base_type.class_type = current_class;
} else {
base_type = DataType(*p_base_type);
}
if (_get_member_type(base_type, p_identifier, member_type)) {
return member_type;
}
if (p_is_indexing) {
// Don't look for globals since this is an indexed identifier
return DataType();
}
if (!p_base_type) {
// Possibly this is a global, check before failing
if (ClassDB::class_exists(p_identifier) || ClassDB::class_exists("_" + p_identifier.operator String())) {
DataType result;
result.has_type = true;
result.is_constant = true;
result.is_meta_type = true;
if (Engine::get_singleton()->has_singleton(p_identifier) || Engine::get_singleton()->has_singleton("_" + p_identifier.operator String())) {
result.is_meta_type = false;
}
result.kind = DataType::NATIVE;
result.native_type = p_identifier;
return result;
}
ClassNode *outer_class = current_class;
while (outer_class) {
if (outer_class->name == p_identifier) {
DataType result;
result.has_type = true;
result.is_constant = true;
result.is_meta_type = true;
result.kind = DataType::CLASS;
result.class_type = outer_class;
return result;
}
if (outer_class->constant_expressions.has(p_identifier)) {
return outer_class->constant_expressions[p_identifier].type;
}
for (int i = 0; i < outer_class->subclasses.size(); i++) {
if (outer_class->subclasses[i] == current_class) {
continue;
}
if (outer_class->subclasses[i]->name == p_identifier) {
DataType result;
result.has_type = true;
result.is_constant = true;
result.is_meta_type = true;
result.kind = DataType::CLASS;
result.class_type = outer_class->subclasses[i];
return result;
}
}
outer_class = outer_class->owner;
}
if (ScriptServer::is_global_class(p_identifier)) {
Ref<Script> scr = ResourceLoader::load(ScriptServer::get_global_class_path(p_identifier));
if (scr.is_valid()) {
DataType result;
result.has_type = true;
result.script_type = scr;
result.is_meta_type = true;
Ref<GDScript> gds = scr;
if (gds.is_valid()) {
if (!gds->is_valid()) {
_set_error("Class '" + p_identifier + "' could not be fully loaded (script error or cyclic dependency).");
return DataType();
}
result.kind = DataType::GDSCRIPT;
} else {
result.kind = DataType::SCRIPT;
}
return result;
}
_set_error("Class '" + p_identifier + "' was found in global scope but its script could not be loaded.");
return DataType();
}
if (GDScriptLanguage::get_singleton()->get_global_map().has(p_identifier)) {
int idx = GDScriptLanguage::get_singleton()->get_global_map()[p_identifier];
Variant g = GDScriptLanguage::get_singleton()->get_global_array()[idx];
return _type_from_variant(g);
}
if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(p_identifier)) {
Variant g = GDScriptLanguage::get_singleton()->get_named_globals_map()[p_identifier];
return _type_from_variant(g);
}
// Non-tool singletons aren't loaded, check project settings
List<PropertyInfo> props;
ProjectSettings::get_singleton()->get_property_list(&props);
for (List<PropertyInfo>::Element *E = props.front(); E; E = E->next()) {
String s = E->get().name;
if (!s.begins_with("autoload/")) {
continue;
}
String name = s.get_slice("/", 1);
if (name == p_identifier) {
String script = ProjectSettings::get_singleton()->get(s);
if (script.begins_with("*")) {
script = script.right(1);
}
if (!script.begins_with("res://")) {
script = "res://" + script;
}
Ref<Script> singleton = ResourceLoader::load(script);
if (singleton.is_valid()) {
DataType result;
result.has_type = true;
result.script_type = singleton;
Ref<GDScript> gds = singleton;
if (gds.is_valid()) {
if (!gds->is_valid()) {
_set_error("Couldn't fully load singleton script '" + p_identifier + "' (possible cyclic reference or parse error).", p_line);
return DataType();
}
result.kind = DataType::GDSCRIPT;
} else {
result.kind = DataType::SCRIPT;
}
}
}
}
// This means looking in the current class, which type is always known
_set_error("Identifier '" + p_identifier.operator String() + "' is not declared in the current scope.", p_line);
}
#ifdef DEBUG_ENABLED
{
DataType tmp_type;
List<DataType> arg_types;
int argcount;
bool _static;
bool vararg;
if (_get_function_signature(base_type, p_identifier, tmp_type, arg_types, argcount, _static, vararg)) {
_add_warning(GDScriptWarning::FUNCTION_USED_AS_PROPERTY, p_line, p_identifier.operator String(), base_type.to_string());
}
}
#endif // DEBUG_ENABLED
_mark_line_as_unsafe(p_line);
return DataType();
}
void GDScriptParser::_check_class_level_types(ClassNode *p_class) {
_mark_line_as_safe(p_class->line);
// Constants
for (Map<StringName, ClassNode::Constant>::Element *E = p_class->constant_expressions.front(); E; E = E->next()) {
ClassNode::Constant &c = E->get();
_mark_line_as_safe(c.expression->line);
DataType cont = _resolve_type(c.type, c.expression->line);
DataType expr = _resolve_type(c.expression->get_datatype(), c.expression->line);
if (check_types && !_is_type_compatible(cont, expr)) {
_set_error("Constant value type (" + expr.to_string() + ") is not compatible with declared type (" + cont.to_string() + ").",
c.expression->line);
return;
}
expr.is_constant = true;
c.type = expr;
c.expression->set_datatype(expr);
DataType tmp;
if (_get_member_type(p_class->base_type, E->key(), tmp)) {
_set_error("Member '" + String(E->key()) + "' already exists in parent class.", c.expression->line);
return;
}
}
// Function declarations
for (int i = 0; i < p_class->static_functions.size(); i++) {
_check_function_types(p_class->static_functions[i]);
if (error_set) return;
}
for (int i = 0; i < p_class->functions.size(); i++) {
_check_function_types(p_class->functions[i]);
if (error_set) return;
}
// Class variables
for (int i = 0; i < p_class->variables.size(); i++) {
ClassNode::Member &v = p_class->variables.write[i];
DataType tmp;
if (_get_member_type(p_class->base_type, v.identifier, tmp)) {
_set_error("Member '" + String(v.identifier) + "' already exists in parent class.", v.line);
return;
}
_mark_line_as_safe(v.line);
v.data_type = _resolve_type(v.data_type, v.line);
if (v.expression) {
DataType expr_type = _reduce_node_type(v.expression);
if (check_types && !_is_type_compatible(v.data_type, expr_type)) {
// Try supertype test
if (_is_type_compatible(expr_type, v.data_type)) {
_mark_line_as_unsafe(v.line);
} else {
// Try with implicit conversion
if (v.data_type.kind != DataType::BUILTIN || !_is_type_compatible(v.data_type, expr_type, true)) {
_set_error("Assigned expression type (" + expr_type.to_string() + ") doesn't match the variable's type (" +
v.data_type.to_string() + ").",
v.line);
return;
}
// Replace assignment with implict conversion
BuiltInFunctionNode *convert = alloc_node<BuiltInFunctionNode>();
convert->line = v.line;
convert->function = GDScriptFunctions::TYPE_CONVERT;
ConstantNode *tgt_type = alloc_node<ConstantNode>();
tgt_type->line = v.line;
tgt_type->value = (int)v.data_type.builtin_type;
OperatorNode *convert_call = alloc_node<OperatorNode>();
convert_call->line = v.line;
convert_call->op = OperatorNode::OP_CALL;
convert_call->arguments.push_back(convert);
convert_call->arguments.push_back(v.expression);
convert_call->arguments.push_back(tgt_type);
v.expression = convert_call;
v.initial_assignment->arguments.write[1] = convert_call;
}
}
if (v.data_type.infer_type) {
if (!expr_type.has_type) {
_set_error("Assigned value does not have a set type, variable type cannot be inferred.", v.line);
return;
}
v.data_type = expr_type;
v.data_type.is_constant = false;
}
} else if (v.data_type.has_type && v.data_type.kind == DataType::BUILTIN) {
// Create default value based on the type
IdentifierNode *id = alloc_node<IdentifierNode>();
id->line = v.line;
id->name = v.identifier;
ConstantNode *init = alloc_node<ConstantNode>();
init->line = v.line;
Variant::CallError err;
init->value = Variant::construct(v.data_type.builtin_type, NULL, 0, err);
OperatorNode *op = alloc_node<OperatorNode>();
op->line = v.line;
op->op = OperatorNode::OP_INIT_ASSIGN;
op->arguments.push_back(id);
op->arguments.push_back(init);
p_class->initializer->statements.push_front(op);
v.initial_assignment = op;
#ifdef DEBUG_ENABLED
NewLineNode *nl = alloc_node<NewLineNode>();
nl->line = v.line - 1;
p_class->initializer->statements.push_front(nl);
#endif
}
// Check export hint
if (v.data_type.has_type && v._export.type != Variant::NIL) {
DataType export_type = _type_from_property(v._export);
if (!_is_type_compatible(v.data_type, export_type, true)) {
_set_error("Export hint type (" + export_type.to_string() + ") doesn't match the variable's type (" +
v.data_type.to_string() + ").",
v.line);
return;
}
}
// Setter and getter
if (v.setter == StringName() && v.getter == StringName()) continue;
bool found_getter = false;
bool found_setter = false;
for (int j = 0; j < p_class->functions.size(); j++) {
if (v.setter == p_class->functions[j]->name) {
found_setter = true;
FunctionNode *setter = p_class->functions[j];
if (setter->arguments.size() != 1) {
_set_error("Setter function needs to receive exactly 1 argument. See '" + setter->name +
"()' definition at line " + itos(setter->line) + ".",
v.line);
return;
}
if (!_is_type_compatible(v.data_type, setter->argument_types[0])) {
_set_error("Setter argument type (" + setter->argument_types[0].to_string() +
") doesn't match the variable's type (" + v.data_type.to_string() + "). See '" +
setter->name + "()' definition at line " + itos(setter->line) + ".",
v.line);
return;
}
continue;
}
if (v.getter == p_class->functions[j]->name) {
found_getter = true;
FunctionNode *getter = p_class->functions[j];
if (getter->arguments.size() != 0) {
_set_error("Getter function can't receive arguments. See '" + getter->name +
"()' definition at line " + itos(getter->line) + ".",
v.line);
return;
}
if (!_is_type_compatible(v.data_type, getter->get_datatype())) {
_set_error("Getter return type (" + getter->get_datatype().to_string() +
") doesn't match the variable's type (" + v.data_type.to_string() +
"). See '" + getter->name + "()' definition at line " + itos(getter->line) + ".",
v.line);
return;
}
}
if (found_getter && found_setter) break;
}
if ((found_getter || v.getter == StringName()) && (found_setter || v.setter == StringName())) continue;
// Check for static functions
for (int j = 0; j < p_class->static_functions.size(); j++) {
if (v.setter == p_class->static_functions[j]->name) {
FunctionNode *setter = p_class->static_functions[j];
_set_error("Setter can't be a static function. See '" + setter->name + "()' definition at line " + itos(setter->line) + ".", v.line);
return;
}
if (v.getter == p_class->static_functions[j]->name) {
FunctionNode *getter = p_class->static_functions[j];
_set_error("Getter can't be a static function. See '" + getter->name + "()' definition at line " + itos(getter->line) + ".", v.line);
return;
}
}
if (!found_setter && v.setter != StringName()) {
_set_error("Setter function is not defined.", v.line);
return;
}
if (!found_getter && v.getter != StringName()) {
_set_error("Getter function is not defined.", v.line);
return;
}
}
// Inner classes
for (int i = 0; i < p_class->subclasses.size(); i++) {
current_class = p_class->subclasses[i];
_check_class_level_types(current_class);
if (error_set) return;
current_class = p_class;
}
}
void GDScriptParser::_check_function_types(FunctionNode *p_function) {
p_function->return_type = _resolve_type(p_function->return_type, p_function->line);
// Arguments
int defaults_ofs = p_function->arguments.size() - p_function->default_values.size();
for (int i = 0; i < p_function->arguments.size(); i++) {
if (i < defaults_ofs) {
p_function->argument_types.write[i] = _resolve_type(p_function->argument_types[i], p_function->line);
} else {
if (p_function->default_values[i - defaults_ofs]->type != Node::TYPE_OPERATOR) {
_set_error("Parser bug: invalid argument default value.", p_function->line, p_function->column);
return;
}
OperatorNode *op = static_cast<OperatorNode *>(p_function->default_values[i - defaults_ofs]);
if (op->op != OperatorNode::OP_ASSIGN || op->arguments.size() != 2) {
_set_error("Parser bug: invalid argument default value operation.", p_function->line);
return;
}
DataType def_type = _reduce_node_type(op->arguments[1]);
if (p_function->argument_types[i].infer_type) {
def_type.is_constant = false;
p_function->argument_types.write[i] = def_type;
} else {
p_function->return_type = _resolve_type(p_function->return_type, p_function->line);
if (!_is_type_compatible(p_function->argument_types[i], def_type, true)) {
String arg_name = p_function->arguments[i];
_set_error("Value type (" + def_type.to_string() + ") doesn't match the type of argument '" +
arg_name + "' (" + p_function->arguments[i] + ")",
p_function->line);
}
}
}
#ifdef DEBUG_ENABLED
if (p_function->arguments_usage[i] == 0 && !p_function->arguments[i].operator String().begins_with("_")) {
_add_warning(GDScriptWarning::UNUSED_ARGUMENT, p_function->line, p_function->name, p_function->arguments[i].operator String());
}
#endif // DEBUG_ENABLED
}
if (!(p_function->name == "_init")) {
// Signature for the initializer may vary
#ifdef DEBUG_ENABLED
DataType return_type;
List<DataType> arg_types;
int default_arg_count = 0;
bool _static = false;
bool vararg = false;
DataType base_type = current_class->base_type;
if (_get_function_signature(base_type, p_function->name, return_type, arg_types, default_arg_count, _static, vararg)) {
bool valid = _static == p_function->_static;
valid = valid && return_type == p_function->return_type;
int argsize_diff = p_function->arguments.size() - arg_types.size();
valid = valid && argsize_diff >= 0;
valid = valid && p_function->default_values.size() >= default_arg_count + argsize_diff;
int i = 0;
for (List<DataType>::Element *E = arg_types.front(); valid && E; E = E->next()) {
valid = valid && E->get() == p_function->argument_types[i++];
}
if (!valid) {
String parent_signature = return_type.has_type ? return_type.to_string() : "Variant";
if (parent_signature == "null") {
parent_signature = "void";
}
parent_signature += " " + p_function->name + "(";
if (arg_types.size()) {
int i = 0;
for (List<DataType>::Element *E = arg_types.front(); E; E = E->next()) {
if (E != arg_types.front()) {
parent_signature += ", ";
}
String arg = E->get().to_string();
if (arg == "null" || arg == "var") {
arg = "Variant";
}
parent_signature += arg;
if (i == arg_types.size() - default_arg_count) {
parent_signature += "=default";
}
i++;
}
}
parent_signature += ")";
_set_error("Function signature doesn't match the parent. Parent signature is: '" + parent_signature + "'.", p_function->line);
return;
}
}
#endif // DEBUG_ENABLED
} else {
if (p_function->return_type.has_type && (p_function->return_type.kind != DataType::BUILTIN || p_function->return_type.builtin_type != Variant::NIL)) {
_set_error("Constructor cannot return a value.", p_function->line);
return;
}
}
if (p_function->return_type.has_type && (p_function->return_type.kind != DataType::BUILTIN || p_function->return_type.builtin_type != Variant::NIL)) {
if (!p_function->body->has_return) {
_set_error("Non-void function must return a value in all possible paths.", p_function->line);
return;
}
}
if (p_function->has_yield) {
// yield() will make the function return a GDScriptFunctionState, so the type is ambiguous
p_function->return_type.has_type = false;
p_function->return_type.may_yield = true;
}
}
void GDScriptParser::_check_class_blocks_types(ClassNode *p_class) {
// Function blocks
for (int i = 0; i < p_class->static_functions.size(); i++) {
current_function = p_class->static_functions[i];
current_block = current_function->body;
_mark_line_as_safe(current_function->line);
_check_block_types(current_block);
current_block = NULL;
current_function = NULL;
if (error_set) return;
}
for (int i = 0; i < p_class->functions.size(); i++) {
current_function = p_class->functions[i];
current_block = current_function->body;
_mark_line_as_safe(current_function->line);
_check_block_types(current_block);
current_block = NULL;
current_function = NULL;
if (error_set) return;
}
#ifdef DEBUG_ENABLED
// Warnings
for (int i = 0; i < p_class->variables.size(); i++) {
if (p_class->variables[i].usages == 0) {
_add_warning(GDScriptWarning::UNUSED_CLASS_VARIABLE, p_class->variables[i].line, p_class->variables[i].identifier);
}
}
for (int i = 0; i < p_class->_signals.size(); i++) {
if (p_class->_signals[i].emissions == 0) {
_add_warning(GDScriptWarning::UNUSED_SIGNAL, p_class->_signals[i].line, p_class->_signals[i].name);
}
}
#endif // DEBUG_ENABLED
// Inner classes
for (int i = 0; i < p_class->subclasses.size(); i++) {
current_class = p_class->subclasses[i];
_check_class_blocks_types(current_class);
if (error_set) return;
current_class = p_class;
}
}
#ifdef DEBUG_ENABLED
static String _find_function_name(const GDScriptParser::OperatorNode *p_call) {
switch (p_call->arguments[0]->type) {
case GDScriptParser::Node::TYPE_TYPE: {
return Variant::get_type_name(static_cast<GDScriptParser::TypeNode *>(p_call->arguments[0])->vtype);
} break;
case GDScriptParser::Node::TYPE_BUILT_IN_FUNCTION: {
return GDScriptFunctions::get_func_name(static_cast<GDScriptParser::BuiltInFunctionNode *>(p_call->arguments[0])->function);
} break;
default: {
int id_index = p_call->op == GDScriptParser::OperatorNode::OP_PARENT_CALL ? 0 : 1;
if (p_call->arguments.size() > id_index && p_call->arguments[id_index]->type == GDScriptParser::Node::TYPE_IDENTIFIER) {
return static_cast<GDScriptParser::IdentifierNode *>(p_call->arguments[id_index])->name;
}
} break;
}
return String();
}
#endif // DEBUG_ENABLED
void GDScriptParser::_check_block_types(BlockNode *p_block) {
Node *last_var_assign = NULL;
// Check each statement
for (List<Node *>::Element *E = p_block->statements.front(); E; E = E->next()) {
Node *statement = E->get();
switch (statement->type) {
case Node::TYPE_NEWLINE:
case Node::TYPE_BREAKPOINT:
case Node::TYPE_ASSERT: {
// Nothing to do
} break;
case Node::TYPE_LOCAL_VAR: {
LocalVarNode *lv = static_cast<LocalVarNode *>(statement);
lv->datatype = _resolve_type(lv->datatype, lv->line);
_mark_line_as_safe(lv->line);
last_var_assign = lv->assign;
if (lv->assign) {
DataType assign_type = _reduce_node_type(lv->assign);
#ifdef DEBUG_ENABLED
if (assign_type.has_type && assign_type.kind == DataType::BUILTIN && assign_type.builtin_type == Variant::NIL) {
if (lv->assign->type == Node::TYPE_OPERATOR) {
OperatorNode *call = static_cast<OperatorNode *>(lv->assign);
if (call->op == OperatorNode::OP_CALL || call->op == OperatorNode::OP_PARENT_CALL) {
_add_warning(GDScriptWarning::VOID_ASSIGNMENT, lv->line, _find_function_name(call));
}
}
}
if (lv->datatype.has_type && assign_type.may_yield && lv->assign->type == Node::TYPE_OPERATOR) {
_add_warning(GDScriptWarning::FUNCTION_MAY_YIELD, lv->line, _find_function_name(static_cast<OperatorNode *>(lv->assign)));
}
#endif // DEBUG_ENABLED
if (!_is_type_compatible(lv->datatype, assign_type)) {
// Try supertype test
if (_is_type_compatible(assign_type, lv->datatype)) {
_mark_line_as_unsafe(lv->line);
} else {
// Try implict conversion
if (lv->datatype.kind != DataType::BUILTIN || !_is_type_compatible(lv->datatype, assign_type, true)) {
_set_error("Assigned value type (" + assign_type.to_string() + ") doesn't match the variable's type (" +
lv->datatype.to_string() + ").",
lv->line);
return;
}
// Replace assignment with implict conversion
BuiltInFunctionNode *convert = alloc_node<BuiltInFunctionNode>();
convert->line = lv->line;
convert->function = GDScriptFunctions::TYPE_CONVERT;
ConstantNode *tgt_type = alloc_node<ConstantNode>();
tgt_type->line = lv->line;
tgt_type->value = (int)lv->datatype.builtin_type;
OperatorNode *convert_call = alloc_node<OperatorNode>();
convert_call->line = lv->line;
convert_call->op = OperatorNode::OP_CALL;
convert_call->arguments.push_back(convert);
convert_call->arguments.push_back(lv->assign);
convert_call->arguments.push_back(tgt_type);
lv->assign = convert_call;
lv->assign_op->arguments.write[1] = convert_call;
#ifdef DEBUG_ENABLED
if (lv->datatype.builtin_type == Variant::INT && assign_type.builtin_type == Variant::REAL) {
_add_warning(GDScriptWarning::NARROWING_CONVERSION, lv->line);
}
#endif // DEBUG_ENABLED
}
}
if (lv->datatype.infer_type) {
if (!assign_type.has_type) {
_set_error("Assigned value does not have a set type, variable type cannot be inferred.", lv->line);
return;
}
lv->datatype = assign_type;
lv->datatype.is_constant = false;
}
if (lv->datatype.has_type && !assign_type.has_type) {
_mark_line_as_unsafe(lv->line);
}
}
} break;
case Node::TYPE_OPERATOR: {
OperatorNode *op = static_cast<OperatorNode *>(statement);
switch (op->op) {
case OperatorNode::OP_ASSIGN:
case OperatorNode::OP_ASSIGN_ADD:
case OperatorNode::OP_ASSIGN_SUB:
case OperatorNode::OP_ASSIGN_MUL:
case OperatorNode::OP_ASSIGN_DIV:
case OperatorNode::OP_ASSIGN_MOD:
case OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case OperatorNode::OP_ASSIGN_BIT_AND:
case OperatorNode::OP_ASSIGN_BIT_OR:
case OperatorNode::OP_ASSIGN_BIT_XOR: {
if (op->arguments.size() < 2) {
_set_error("Parser bug: operation without enough arguments.", op->line, op->column);
return;
}
if (op->arguments[1] == last_var_assign) {
// Assignment was already checked
break;
}
_mark_line_as_safe(op->line);
DataType lh_type = _reduce_node_type(op->arguments[0]);
if (error_set) {
return;
}
if (!lh_type.has_type && check_types) {
if (op->arguments[0]->type == Node::TYPE_OPERATOR) {
_mark_line_as_unsafe(op->line);
}
} else if (lh_type.is_constant) {
_set_error("Cannot assign a new value to a constant.", op->line);
return;
}
DataType rh_type;
if (op->op != OperatorNode::OP_ASSIGN) {
// Validate operation
DataType arg_type = _reduce_node_type(op->arguments[1]);
if (!arg_type.has_type) {
_mark_line_as_unsafe(op->line);
break;
}
Variant::Operator oper = _get_variant_operation(op->op);
bool valid = false;
rh_type = _get_operation_type(oper, lh_type, arg_type, valid);
if (check_types && !valid) {
_set_error("Invalid operand types ('" + lh_type.to_string() + "' and '" + arg_type.to_string() +
"') to assignment operator '" + Variant::get_operator_name(oper) + "'.",
op->line);
return;
}
} else {
rh_type = _reduce_node_type(op->arguments[1]);
}
#ifdef DEBUG_ENABLED
if (rh_type.has_type && rh_type.kind == DataType::BUILTIN && rh_type.builtin_type == Variant::NIL) {
if (op->arguments[1]->type == Node::TYPE_OPERATOR) {
OperatorNode *call = static_cast<OperatorNode *>(op->arguments[1]);
if (call->op == OperatorNode::OP_CALL || call->op == OperatorNode::OP_PARENT_CALL) {
_add_warning(GDScriptWarning::VOID_ASSIGNMENT, op->line, _find_function_name(call));
}
}
}
if (lh_type.has_type && rh_type.may_yield && op->arguments[1]->type == Node::TYPE_OPERATOR) {
_add_warning(GDScriptWarning::FUNCTION_MAY_YIELD, op->line, _find_function_name(static_cast<OperatorNode *>(op->arguments[1])));
}
#endif // DEBUG_ENABLED
if (check_types && !_is_type_compatible(lh_type, rh_type)) {
// Try supertype test
if (_is_type_compatible(rh_type, lh_type)) {
_mark_line_as_unsafe(op->line);
} else {
// Try implict conversion
if (lh_type.kind != DataType::BUILTIN || !_is_type_compatible(lh_type, rh_type, true)) {
_set_error("Assigned value type (" + rh_type.to_string() + ") doesn't match the variable's type (" +
lh_type.to_string() + ").",
op->line);
return;
}
// Replace assignment with implict conversion
BuiltInFunctionNode *convert = alloc_node<BuiltInFunctionNode>();
convert->line = op->line;
convert->function = GDScriptFunctions::TYPE_CONVERT;
ConstantNode *tgt_type = alloc_node<ConstantNode>();
tgt_type->line = op->line;
tgt_type->value = (int)lh_type.builtin_type;
OperatorNode *convert_call = alloc_node<OperatorNode>();
convert_call->line = op->line;
convert_call->op = OperatorNode::OP_CALL;
convert_call->arguments.push_back(convert);
convert_call->arguments.push_back(op->arguments[1]);
convert_call->arguments.push_back(tgt_type);
op->arguments.write[1] = convert_call;
#ifdef DEBUG_ENABLED
if (lh_type.builtin_type == Variant::INT && rh_type.builtin_type == Variant::REAL) {
_add_warning(GDScriptWarning::NARROWING_CONVERSION, op->line);
}
#endif // DEBUG_ENABLED
}
}
#ifdef DEBUG_ENABLED
if (!rh_type.has_type && (op->op != OperatorNode::OP_ASSIGN || lh_type.has_type || op->arguments[0]->type == Node::TYPE_OPERATOR)) {
_mark_line_as_unsafe(op->line);
}
#endif // DEBUG_ENABLED
} break;
case OperatorNode::OP_CALL:
case OperatorNode::OP_PARENT_CALL: {
_mark_line_as_safe(op->line);
DataType func_type = _reduce_function_call_type(op);
#ifdef DEBUG_ENABLED
if (func_type.has_type && (func_type.kind != DataType::BUILTIN || func_type.builtin_type != Variant::NIL)) {
// Figure out function name for warning
String func_name = _find_function_name(op);
if (func_name.empty()) {
func_name = "<undetected name>";
}
_add_warning(GDScriptWarning::RETURN_VALUE_DISCARDED, op->line, func_name);
}
#endif // DEBUG_ENABLED
if (error_set) return;
} break;
case OperatorNode::OP_YIELD: {
_mark_line_as_safe(op->line);
_reduce_node_type(op);
} break;
default: {
_mark_line_as_safe(op->line);
_reduce_node_type(op); // Test for safety anyway
#ifdef DEBUG_ENABLED
_add_warning(GDScriptWarning::STANDALONE_EXPRESSION, statement->line);
#endif // DEBUG_ENABLED
}
}
} break;
case Node::TYPE_CONTROL_FLOW: {
ControlFlowNode *cf = static_cast<ControlFlowNode *>(statement);
_mark_line_as_safe(cf->line);
switch (cf->cf_type) {
case ControlFlowNode::CF_RETURN: {
DataType function_type = current_function->get_datatype();
DataType ret_type;
if (cf->arguments.size() > 0) {
ret_type = _reduce_node_type(cf->arguments[0]);
if (error_set) {
return;
}
}
if (!function_type.has_type) break;
if (function_type.kind == DataType::BUILTIN && function_type.builtin_type == Variant::NIL) {
// Return void, should not have arguments
if (cf->arguments.size() > 0) {
_set_error("Void function cannot return a value.", cf->line, cf->column);
return;
}
} else {
// Return something, cannot be empty
if (cf->arguments.size() == 0) {
_set_error("Non-void function must return a value.", cf->line, cf->column);
return;
}
if (!_is_type_compatible(function_type, ret_type)) {
_set_error("Returned value type (" + ret_type.to_string() + ") doesn't match the function return type (" +
function_type.to_string() + ").",
cf->line, cf->column);
return;
}
}
} break;
case ControlFlowNode::CF_MATCH: {
MatchNode *match_node = cf->match;
_transform_match_statment(match_node);
} break;
default: {
if (cf->body_else) {
_mark_line_as_safe(cf->body_else->line);
}
for (int i = 0; i < cf->arguments.size(); i++) {
_reduce_node_type(cf->arguments[i]);
}
} break;
}
} break;
case Node::TYPE_CONSTANT: {
ConstantNode *cn = static_cast<ConstantNode *>(statement);
// Strings are fine since they can be multiline comments
if (cn->value.get_type() == Variant::STRING) {
break;
}
} // falthrough
default: {
_mark_line_as_safe(statement->line);
_reduce_node_type(statement); // Test for safety anyway
#ifdef DEBUG_ENABLED
_add_warning(GDScriptWarning::STANDALONE_EXPRESSION, statement->line);
#endif // DEBUG_ENABLED
}
}
}
// Parse sub blocks
for (int i = 0; i < p_block->sub_blocks.size(); i++) {
current_block = p_block->sub_blocks[i];
_check_block_types(current_block);
current_block = p_block;
if (error_set) return;
}
#ifdef DEBUG_ENABLED
// Warnings check
for (Map<StringName, LocalVarNode *>::Element *E = p_block->variables.front(); E; E = E->next()) {
LocalVarNode *lv = E->get();
if (!lv->name.operator String().begins_with("_")) {
if (lv->usages == 0) {
_add_warning(GDScriptWarning::UNUSED_VARIABLE, lv->line, lv->name);
} else if (lv->assignments == 0) {
_add_warning(GDScriptWarning::UNASSIGNED_VARIABLE, lv->line, lv->name);
}
}
}
#endif // DEBUG_ENABLED
}
void GDScriptParser::_set_error(const String &p_error, int p_line, int p_column) {
if (error_set)
return; //allow no further errors
error = p_error;
error_line = p_line < 0 ? tokenizer->get_token_line() : p_line;
error_column = p_column < 0 ? tokenizer->get_token_column() : p_column;
error_set = true;
}
#ifdef DEBUG_ENABLED
void GDScriptParser::_add_warning(int p_code, int p_line, const String &p_symbol1, const String &p_symbol2, const String &p_symbol3, const String &p_symbol4) {
Vector<String> symbols;
if (!p_symbol1.empty()) {
symbols.push_back(p_symbol1);
}
if (!p_symbol2.empty()) {
symbols.push_back(p_symbol2);
}
if (!p_symbol3.empty()) {
symbols.push_back(p_symbol3);
}
if (!p_symbol4.empty()) {
symbols.push_back(p_symbol4);
}
_add_warning(p_code, p_line, symbols);
}
void GDScriptParser::_add_warning(int p_code, int p_line, const Vector<String> &p_symbols) {
if (tokenizer->is_ignoring_warnings() || !GLOBAL_GET("debug/gdscript/warnings/enable").booleanize()) {
return;
}
String warn_name = GDScriptWarning::get_name_from_code((GDScriptWarning::Code)p_code).to_lower();
if (tokenizer->get_warning_global_skips().has(warn_name)) {
return;
}
if (!GLOBAL_GET("debug/gdscript/warnings/" + warn_name)) {
return;
}
GDScriptWarning warn;
warn.code = (GDScriptWarning::Code)p_code;
warn.symbols = p_symbols;
warn.line = p_line == -1 ? tokenizer->get_token_line() : p_line;
List<GDScriptWarning>::Element *before = NULL;
for (List<GDScriptWarning>::Element *E = warnings.front(); E; E = E->next()) {
if (E->get().line > warn.line) {
break;
}
before = E;
}
if (before) {
warnings.insert_after(before, warn);
} else {
warnings.push_front(warn);
}
}
#endif // DEBUG_ENABLED
String GDScriptParser::get_error() const {
return error;
}
int GDScriptParser::get_error_line() const {
return error_line;
}
int GDScriptParser::get_error_column() const {
return error_column;
}
Error GDScriptParser::_parse(const String &p_base_path) {
base_path = p_base_path;
//assume class
ClassNode *main_class = alloc_node<ClassNode>();
main_class->initializer = alloc_node<BlockNode>();
main_class->initializer->parent_class = main_class;
main_class->ready = alloc_node<BlockNode>();
main_class->ready->parent_class = main_class;
current_class = main_class;
_parse_class(main_class);
if (tokenizer->get_token() == GDScriptTokenizer::TK_ERROR) {
error_set = false;
_set_error("Parse Error: " + tokenizer->get_token_error());
}
if (error_set && !for_completion) {
return ERR_PARSE_ERROR;
}
_determine_inheritance(main_class);
if (error_set) {
return ERR_PARSE_ERROR;
}
current_class = main_class;
current_function = NULL;
current_block = NULL;
#ifdef DEBUG_ENABLED
if (for_completion) check_types = false;
#else
check_types = false;
#endif
// Resolve all class-level stuff before getting into function blocks
_check_class_level_types(main_class);
if (error_set) {
return ERR_PARSE_ERROR;
}
// Resolve the function blocks
_check_class_blocks_types(main_class);
if (error_set) {
return ERR_PARSE_ERROR;
}
#ifdef DEBUG_ENABLED
// Resolve warning ignores
Vector<Pair<int, String> > warning_skips = tokenizer->get_warning_skips();
bool warning_is_error = GLOBAL_GET("debug/gdscript/warnings/treat_warnings_as_errors").booleanize();
for (List<GDScriptWarning>::Element *E = warnings.front(); E;) {
GDScriptWarning &w = E->get();
int skip_index = -1;
for (int i = 0; i < warning_skips.size(); i++) {
if (warning_skips[i].first >= w.line) {
break;
}
skip_index = i;
}
List<GDScriptWarning>::Element *next = E->next();
bool erase = false;
if (skip_index != -1) {
if (warning_skips[skip_index].second == GDScriptWarning::get_name_from_code(w.code).to_lower()) {
erase = true;
}
warning_skips.remove(skip_index);
}
if (erase) {
warnings.erase(E);
} else if (warning_is_error) {
_set_error(w.get_message() + " (warning treated as error)", w.line);
return ERR_PARSE_ERROR;
}
E = next;
}
#endif // DEBUG_ENABLED
return OK;
}
Error GDScriptParser::parse_bytecode(const Vector<uint8_t> &p_bytecode, const String &p_base_path, const String &p_self_path) {
clear();
self_path = p_self_path;
GDScriptTokenizerBuffer *tb = memnew(GDScriptTokenizerBuffer);
tb->set_code_buffer(p_bytecode);
tokenizer = tb;
Error ret = _parse(p_base_path);
memdelete(tb);
tokenizer = NULL;
return ret;
}
Error GDScriptParser::parse(const String &p_code, const String &p_base_path, bool p_just_validate, const String &p_self_path, bool p_for_completion, Set<int> *r_safe_lines) {
clear();
self_path = p_self_path;
GDScriptTokenizerText *tt = memnew(GDScriptTokenizerText);
tt->set_code(p_code);
validating = p_just_validate;
for_completion = p_for_completion;
#ifdef DEBUG_ENABLED
safe_lines = r_safe_lines;
#endif // DEBUG_ENABLED
tokenizer = tt;
Error ret = _parse(p_base_path);
memdelete(tt);
tokenizer = NULL;
return ret;
}
bool GDScriptParser::is_tool_script() const {
return (head && head->type == Node::TYPE_CLASS && static_cast<const ClassNode *>(head)->tool);
}
const GDScriptParser::Node *GDScriptParser::get_parse_tree() const {
return head;
}
void GDScriptParser::clear() {
while (list) {
Node *l = list;
list = list->next;
memdelete(l);
}
head = NULL;
list = NULL;
completion_type = COMPLETION_NONE;
completion_node = NULL;
completion_class = NULL;
completion_function = NULL;
completion_block = NULL;
current_block = NULL;
current_class = NULL;
completion_found = false;
rpc_mode = MultiplayerAPI::RPC_MODE_DISABLED;
current_function = NULL;
validating = false;
for_completion = false;
error_set = false;
tab_level.clear();
tab_level.push_back(0);
error_line = 0;
error_column = 0;
pending_newline = -1;
parenthesis = 0;
current_export.type = Variant::NIL;
check_types = true;
error = "";
#ifdef DEBUG_ENABLED
safe_lines = NULL;
#endif // DEBUG_ENABLED
}
GDScriptParser::CompletionType GDScriptParser::get_completion_type() {
return completion_type;
}
StringName GDScriptParser::get_completion_cursor() {
return completion_cursor;
}
int GDScriptParser::get_completion_line() {
return completion_line;
}
Variant::Type GDScriptParser::get_completion_built_in_constant() {
return completion_built_in_constant;
}
GDScriptParser::Node *GDScriptParser::get_completion_node() {
return completion_node;
}
GDScriptParser::BlockNode *GDScriptParser::get_completion_block() {
return completion_block;
}
GDScriptParser::ClassNode *GDScriptParser::get_completion_class() {
return completion_class;
}
GDScriptParser::FunctionNode *GDScriptParser::get_completion_function() {
return completion_function;
}
int GDScriptParser::get_completion_argument_index() {
return completion_argument;
}
int GDScriptParser::get_completion_identifier_is_function() {
return completion_ident_is_call;
}
GDScriptParser::GDScriptParser() {
head = NULL;
list = NULL;
tokenizer = NULL;
pending_newline = -1;
clear();
}
GDScriptParser::~GDScriptParser() {
clear();
}
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