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godot/modules/gdscript/gdscript_compiler.cpp

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/*************************************************************************/
/* gdscript_compiler.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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_compiler.h"
#include "gdscript.h"
bool GDScriptCompiler::_is_class_member_property(CodeGen &codegen, const StringName &p_name) {
if (codegen.function_node && codegen.function_node->_static)
return false;
if (codegen.stack_identifiers.has(p_name))
return false; //shadowed
return _is_class_member_property(codegen.script, p_name);
}
bool GDScriptCompiler::_is_class_member_property(GDScript *owner, const StringName &p_name) {
GDScript *scr = owner;
GDScriptNativeClass *nc = NULL;
while (scr) {
if (scr->native.is_valid())
nc = scr->native.ptr();
scr = scr->_base;
}
ERR_FAIL_COND_V(!nc, false);
return ClassDB::has_property(nc->get_name(), p_name);
}
void GDScriptCompiler::_set_error(const String &p_error, const GDScriptParser::Node *p_node) {
if (error != "")
return;
error = p_error;
if (p_node) {
err_line = p_node->line;
err_column = p_node->column;
} else {
err_line = 0;
err_column = 0;
}
}
bool GDScriptCompiler::_create_unary_operator(CodeGen &codegen, const GDScriptParser::OperatorNode *on, Variant::Operator op, int p_stack_level) {
ERR_FAIL_COND_V(on->arguments.size() != 1, false);
int src_address_a = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (src_address_a < 0)
return false;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_OPERATOR); // perform operator
codegen.opcodes.push_back(op); //which operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_a); // argument 2 (repeated)
//codegen.opcodes.push_back(GDScriptFunction::ADDR_TYPE_NIL); // argument 2 (unary only takes one parameter)
return true;
}
bool GDScriptCompiler::_create_binary_operator(CodeGen &codegen, const GDScriptParser::OperatorNode *on, Variant::Operator op, int p_stack_level, bool p_initializer, int p_index_addr) {
ERR_FAIL_COND_V(on->arguments.size() != 2, false);
int src_address_a = _parse_expression(codegen, on->arguments[0], p_stack_level, false, p_initializer, p_index_addr);
if (src_address_a < 0)
return false;
if (src_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)
p_stack_level++; //uses stack for return, increase stack
int src_address_b = _parse_expression(codegen, on->arguments[1], p_stack_level, false, p_initializer);
if (src_address_b < 0)
return false;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_OPERATOR); // perform operator
codegen.opcodes.push_back(op); //which operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
return true;
}
GDScriptDataType GDScriptCompiler::_gdtype_from_datatype(const GDScriptParser::DataType &p_datatype, GDScript *p_owner) const {
if (!p_datatype.has_type) {
return GDScriptDataType();
}
GDScriptDataType result;
result.has_type = true;
switch (p_datatype.kind) {
case GDScriptParser::DataType::BUILTIN: {
result.kind = GDScriptDataType::BUILTIN;
result.builtin_type = p_datatype.builtin_type;
} break;
case GDScriptParser::DataType::NATIVE: {
result.kind = GDScriptDataType::NATIVE;
result.native_type = p_datatype.native_type;
} break;
case GDScriptParser::DataType::SCRIPT: {
result.kind = GDScriptDataType::SCRIPT;
result.script_type_ref = Ref<Script>(p_datatype.script_type);
result.script_type = result.script_type_ref.ptr();
result.native_type = result.script_type->get_instance_base_type();
} break;
case GDScriptParser::DataType::GDSCRIPT: {
result.kind = GDScriptDataType::GDSCRIPT;
result.script_type_ref = Ref<Script>(p_datatype.script_type);
result.script_type = result.script_type_ref.ptr();
result.native_type = result.script_type->get_instance_base_type();
} break;
case GDScriptParser::DataType::CLASS: {
// Locate class by constructing the path to it and following that path
GDScriptParser::ClassNode *class_type = p_datatype.class_type;
List<StringName> names;
while (class_type->owner) {
names.push_back(class_type->name);
class_type = class_type->owner;
}
Ref<GDScript> script = Ref<GDScript>(main_script);
while (names.back()) {
if (!script->subclasses.has(names.back()->get())) {
ERR_PRINT("Parser bug: Cannot locate datatype class.");
result.has_type = false;
return GDScriptDataType();
}
script = script->subclasses[names.back()->get()];
names.pop_back();
}
result.kind = GDScriptDataType::GDSCRIPT;
result.script_type_ref = Ref<Script>(script);
result.script_type = result.script_type_ref.ptr();
result.native_type = script->get_instance_base_type();
} break;
default: {
ERR_PRINT("Parser bug: converting unresolved type.");
return GDScriptDataType();
}
}
// Only hold strong reference to the script if it's not the owner of the
// element qualified with this type, to avoid cyclic references (leaks).
if (result.script_type && result.script_type == p_owner) {
result.script_type_ref = Ref<Script>();
}
return result;
}
int GDScriptCompiler::_parse_assign_right_expression(CodeGen &codegen, const GDScriptParser::OperatorNode *p_expression, int p_stack_level, int p_index_addr) {
Variant::Operator var_op = Variant::OP_MAX;
switch (p_expression->op) {
case GDScriptParser::OperatorNode::OP_ASSIGN_ADD:
var_op = Variant::OP_ADD;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_SUB:
var_op = Variant::OP_SUBTRACT;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_MUL:
var_op = Variant::OP_MULTIPLY;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_DIV:
var_op = Variant::OP_DIVIDE;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_MOD:
var_op = Variant::OP_MODULE;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_LEFT:
var_op = Variant::OP_SHIFT_LEFT;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
var_op = Variant::OP_SHIFT_RIGHT;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_AND:
var_op = Variant::OP_BIT_AND;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_OR:
var_op = Variant::OP_BIT_OR;
break;
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_XOR:
var_op = Variant::OP_BIT_XOR;
break;
case GDScriptParser::OperatorNode::OP_INIT_ASSIGN:
case GDScriptParser::OperatorNode::OP_ASSIGN: {
//none
} break;
default: {
ERR_FAIL_V(-1);
}
}
bool initializer = p_expression->op == GDScriptParser::OperatorNode::OP_INIT_ASSIGN;
if (var_op == Variant::OP_MAX) {
return _parse_expression(codegen, p_expression->arguments[1], p_stack_level, false, initializer);
}
if (!_create_binary_operator(codegen, p_expression, var_op, p_stack_level, initializer, p_index_addr))
return -1;
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
}
int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::Node *p_expression, int p_stack_level, bool p_root, bool p_initializer, int p_index_addr) {
switch (p_expression->type) {
//should parse variable declaration and adjust stack accordingly...
case GDScriptParser::Node::TYPE_IDENTIFIER: {
//return identifier
//wait, identifier could be a local variable or something else... careful here, must reference properly
//as stack may be more interesting to work with
//This could be made much simpler by just indexing "self", but done this way (with custom self-addressing modes) increases performance a lot.
const GDScriptParser::IdentifierNode *in = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
StringName identifier = in->name;
// TRY STACK!
if (!p_initializer && codegen.stack_identifiers.has(identifier)) {
int pos = codegen.stack_identifiers[identifier];
return pos | (GDScriptFunction::ADDR_TYPE_STACK_VARIABLE << GDScriptFunction::ADDR_BITS);
}
// TRY CLASS MEMBER
if (_is_class_member_property(codegen, identifier)) {
//get property
codegen.opcodes.push_back(GDScriptFunction::OPCODE_GET_MEMBER); // perform operator
codegen.opcodes.push_back(codegen.get_name_map_pos(identifier)); // argument 2 (unary only takes one parameter)
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
}
//TRY MEMBERS!
if (!codegen.function_node || !codegen.function_node->_static) {
// TRY MEMBER VARIABLES!
//static function
if (codegen.script->member_indices.has(identifier)) {
int idx = codegen.script->member_indices[identifier].index;
return idx | (GDScriptFunction::ADDR_TYPE_MEMBER << GDScriptFunction::ADDR_BITS); //argument (stack root)
}
}
//TRY CLASS CONSTANTS
GDScript *owner = codegen.script;
while (owner) {
GDScript *scr = owner;
GDScriptNativeClass *nc = NULL;
while (scr) {
if (scr->constants.has(identifier)) {
//int idx=scr->constants[identifier];
int idx = codegen.get_name_map_pos(identifier);
return idx | (GDScriptFunction::ADDR_TYPE_CLASS_CONSTANT << GDScriptFunction::ADDR_BITS); //argument (stack root)
}
if (scr->native.is_valid())
nc = scr->native.ptr();
scr = scr->_base;
}
// CLASS C++ Integer Constant
if (nc) {
bool success = false;
int constant = ClassDB::get_integer_constant(nc->get_name(), identifier, &success);
if (success) {
Variant key = constant;
int idx;
if (!codegen.constant_map.has(key)) {
idx = codegen.constant_map.size();
codegen.constant_map[key] = idx;
} else {
idx = codegen.constant_map[key];
}
return idx | (GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS); //make it a local constant (faster access)
}
}
owner = owner->_owner;
}
if (GDScriptLanguage::get_singleton()->get_global_map().has(identifier)) {
int idx = GDScriptLanguage::get_singleton()->get_global_map()[identifier];
return idx | (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
}
/* TRY GLOBAL CLASSES */
if (ScriptServer::is_global_class(identifier)) {
const GDScriptParser::ClassNode *class_node = codegen.class_node;
while (class_node->owner) {
class_node = class_node->owner;
}
if (class_node->name == identifier) {
_set_error("Using own name in class file is not allowed (creates a cyclic reference)", p_expression);
return -1;
}
RES res = ResourceLoader::load(ScriptServer::get_global_class_path(identifier));
if (res.is_null()) {
_set_error("Can't load global class " + String(identifier) + ", cyclic reference?", p_expression);
return -1;
}
Variant key = res;
int idx;
if (!codegen.constant_map.has(key)) {
idx = codegen.constant_map.size();
codegen.constant_map[key] = idx;
} else {
idx = codegen.constant_map[key];
}
return idx | (GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS); //make it a local constant (faster access)
}
#ifdef TOOLS_ENABLED
if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
int idx = codegen.named_globals.find(identifier);
if (idx == -1) {
idx = codegen.named_globals.size();
codegen.named_globals.push_back(identifier);
}
return idx | (GDScriptFunction::ADDR_TYPE_NAMED_GLOBAL << GDScriptFunction::ADDR_BITS);
}
#endif
//not found, error
_set_error("Identifier not found: " + String(identifier), p_expression);
return -1;
} break;
case GDScriptParser::Node::TYPE_CONSTANT: {
//return constant
const GDScriptParser::ConstantNode *cn = static_cast<const GDScriptParser::ConstantNode *>(p_expression);
int idx;
if (!codegen.constant_map.has(cn->value)) {
idx = codegen.constant_map.size();
codegen.constant_map[cn->value] = idx;
} else {
idx = codegen.constant_map[cn->value];
}
return idx | (GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS); //argument (stack root)
} break;
case GDScriptParser::Node::TYPE_SELF: {
//return constant
if (codegen.function_node && codegen.function_node->_static) {
_set_error("'self' not present in static function!", p_expression);
return -1;
}
return (GDScriptFunction::ADDR_TYPE_SELF << GDScriptFunction::ADDR_BITS);
} break;
case GDScriptParser::Node::TYPE_ARRAY: {
const GDScriptParser::ArrayNode *an = static_cast<const GDScriptParser::ArrayNode *>(p_expression);
Vector<int> values;
int slevel = p_stack_level;
for (int i = 0; i < an->elements.size(); i++) {
int ret = _parse_expression(codegen, an->elements[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CONSTRUCT_ARRAY);
codegen.opcodes.push_back(values.size());
for (int i = 0; i < values.size(); i++)
codegen.opcodes.push_back(values[i]);
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDScriptParser::Node::TYPE_DICTIONARY: {
const GDScriptParser::DictionaryNode *dn = static_cast<const GDScriptParser::DictionaryNode *>(p_expression);
Vector<int> values;
int slevel = p_stack_level;
for (int i = 0; i < dn->elements.size(); i++) {
int ret = _parse_expression(codegen, dn->elements[i].key, slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
ret = _parse_expression(codegen, dn->elements[i].value, slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CONSTRUCT_DICTIONARY);
codegen.opcodes.push_back(dn->elements.size());
for (int i = 0; i < values.size(); i++)
codegen.opcodes.push_back(values[i]);
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDScriptParser::Node::TYPE_CAST: {
const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
int slevel = p_stack_level;
int src_addr = _parse_expression(codegen, cn->source_node, slevel);
if (src_addr < 0)
return src_addr;
if (src_addr & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
GDScriptDataType cast_type = _gdtype_from_datatype(cn->cast_type);
switch (cast_type.kind) {
case GDScriptDataType::BUILTIN: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_BUILTIN);
codegen.opcodes.push_back(cast_type.builtin_type);
} break;
case GDScriptDataType::NATIVE: {
int class_idx;
if (GDScriptLanguage::get_singleton()->get_global_map().has(cast_type.native_type)) {
class_idx = GDScriptLanguage::get_singleton()->get_global_map()[cast_type.native_type];
class_idx |= (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
} else {
_set_error("Invalid native class type '" + String(cast_type.native_type) + "'.", cn);
return -1;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_NATIVE); // perform operator
codegen.opcodes.push_back(class_idx); // variable type
} break;
case GDScriptDataType::SCRIPT:
case GDScriptDataType::GDSCRIPT: {
Variant script = cast_type.script_type;
int idx = codegen.get_constant_pos(script);
idx |= GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS; //make it a local constant (faster access)
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_SCRIPT); // perform operator
codegen.opcodes.push_back(idx); // variable type
} break;
default: {
_set_error("Parser bug: unresolved data type.", cn);
return -1;
}
}
codegen.opcodes.push_back(src_addr); // source address
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDScriptParser::Node::TYPE_OPERATOR: {
//hell breaks loose
const GDScriptParser::OperatorNode *on = static_cast<const GDScriptParser::OperatorNode *>(p_expression);
switch (on->op) {
//call/constructor operator
case GDScriptParser::OperatorNode::OP_PARENT_CALL: {
ERR_FAIL_COND_V(on->arguments.size() < 1, -1);
const GDScriptParser::IdentifierNode *in = (const GDScriptParser::IdentifierNode *)on->arguments[0];
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 1; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CALL_SELF_BASE); // basic type constructor
codegen.opcodes.push_back(codegen.get_name_map_pos(in->name)); //instance
codegen.opcodes.push_back(arguments.size()); //argument count
codegen.alloc_call(arguments.size());
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]); //arguments
} break;
case GDScriptParser::OperatorNode::OP_CALL: {
if (on->arguments[0]->type == GDScriptParser::Node::TYPE_TYPE) {
//construct a basic type
ERR_FAIL_COND_V(on->arguments.size() < 1, -1);
const GDScriptParser::TypeNode *tn = (const GDScriptParser::TypeNode *)on->arguments[0];
int vtype = tn->vtype;
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 1; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CONSTRUCT); // basic type constructor
codegen.opcodes.push_back(vtype); //instance
codegen.opcodes.push_back(arguments.size()); //argument count
codegen.alloc_call(arguments.size());
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]); //arguments
} else if (on->arguments[0]->type == GDScriptParser::Node::TYPE_BUILT_IN_FUNCTION) {
//built in function
ERR_FAIL_COND_V(on->arguments.size() < 1, -1);
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 1; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CALL_BUILT_IN);
codegen.opcodes.push_back(static_cast<const GDScriptParser::BuiltInFunctionNode *>(on->arguments[0])->function);
codegen.opcodes.push_back(on->arguments.size() - 1);
codegen.alloc_call(on->arguments.size() - 1);
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]);
} else {
//regular function
ERR_FAIL_COND_V(on->arguments.size() < 2, -1);
const GDScriptParser::Node *instance = on->arguments[0];
if (instance->type == GDScriptParser::Node::TYPE_SELF) {
//room for optimization
}
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 0; i < on->arguments.size(); i++) {
int ret;
if (i == 0 && on->arguments[i]->type == GDScriptParser::Node::TYPE_SELF && codegen.function_node && codegen.function_node->_static) {
//static call to self
ret = (GDScriptFunction::ADDR_TYPE_CLASS << GDScriptFunction::ADDR_BITS);
} else if (i == 1) {
if (on->arguments[i]->type != GDScriptParser::Node::TYPE_IDENTIFIER) {
_set_error("Attempt to call a non-identifier.", on);
return -1;
}
GDScriptParser::IdentifierNode *id = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[i]);
ret = codegen.get_name_map_pos(id->name);
} else {
ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
}
arguments.push_back(ret);
}
codegen.opcodes.push_back(p_root ? GDScriptFunction::OPCODE_CALL : GDScriptFunction::OPCODE_CALL_RETURN); // perform operator
codegen.opcodes.push_back(on->arguments.size() - 2);
codegen.alloc_call(on->arguments.size() - 2);
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]);
}
} break;
case GDScriptParser::OperatorNode::OP_YIELD: {
ERR_FAIL_COND_V(on->arguments.size() && on->arguments.size() != 2, -1);
Vector<int> arguments;
int slevel = p_stack_level;
for (int i = 0; i < on->arguments.size(); i++) {
int ret = _parse_expression(codegen, on->arguments[i], slevel);
if (ret < 0)
return ret;
if ((ret >> GDScriptFunction::ADDR_BITS & GDScriptFunction::ADDR_TYPE_STACK) == GDScriptFunction::ADDR_TYPE_STACK) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(arguments.size() == 0 ? GDScriptFunction::OPCODE_YIELD : GDScriptFunction::OPCODE_YIELD_SIGNAL); // basic type constructor
for (int i = 0; i < arguments.size(); i++)
codegen.opcodes.push_back(arguments[i]); //arguments
codegen.opcodes.push_back(GDScriptFunction::OPCODE_YIELD_RESUME);
//next will be where to place the result :)
} break;
//indexing operator
case GDScriptParser::OperatorNode::OP_INDEX:
case GDScriptParser::OperatorNode::OP_INDEX_NAMED: {
ERR_FAIL_COND_V(on->arguments.size() != 2, -1);
int slevel = p_stack_level;
bool named = (on->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED);
int from = _parse_expression(codegen, on->arguments[0], slevel);
if (from < 0)
return from;
int index;
if (p_index_addr != 0) {
index = p_index_addr;
} else if (named) {
if (on->arguments[0]->type == GDScriptParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
GDScriptParser::IdentifierNode *identifier = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[1]);
const Map<StringName, GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(identifier->name);
#ifdef DEBUG_ENABLED
if (MI && MI->get().getter == codegen.function_node->name) {
String n = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[1])->name;
_set_error("Must use '" + n + "' instead of 'self." + n + "' in getter.", on);
return -1;
}
#endif
if (MI && MI->get().getter == "") {
// Faster than indexing self (as if no self. had been used)
return (MI->get().index) | (GDScriptFunction::ADDR_TYPE_MEMBER << GDScriptFunction::ADDR_BITS);
}
}
index = codegen.get_name_map_pos(static_cast<GDScriptParser::IdentifierNode *>(on->arguments[1])->name);
} else {
if (on->arguments[1]->type == GDScriptParser::Node::TYPE_CONSTANT && static_cast<const GDScriptParser::ConstantNode *>(on->arguments[1])->value.get_type() == Variant::STRING) {
//also, somehow, named (speed up anyway)
StringName name = static_cast<const GDScriptParser::ConstantNode *>(on->arguments[1])->value;
index = codegen.get_name_map_pos(name);
named = true;
} else {
//regular indexing
if (from & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
index = _parse_expression(codegen, on->arguments[1], slevel);
if (index < 0)
return index;
}
}
codegen.opcodes.push_back(named ? GDScriptFunction::OPCODE_GET_NAMED : GDScriptFunction::OPCODE_GET); // perform operator
codegen.opcodes.push_back(from); // argument 1
codegen.opcodes.push_back(index); // argument 2 (unary only takes one parameter)
} break;
case GDScriptParser::OperatorNode::OP_AND: {
// AND operator with early out on failure
int res = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen, on->arguments[1], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos2 = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TRUE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
codegen.opcodes.write[jump_fail_pos] = codegen.opcodes.size();
codegen.opcodes.write[jump_fail_pos2] = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_FALSE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
return p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS;
} break;
case GDScriptParser::OperatorNode::OP_OR: {
// OR operator with early out on success
int res = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(res);
int jump_success_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen, on->arguments[1], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(res);
int jump_success_pos2 = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_FALSE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
codegen.opcodes.write[jump_success_pos] = codegen.opcodes.size();
codegen.opcodes.write[jump_success_pos2] = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TRUE);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
return p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS;
} break;
// ternary operators
case GDScriptParser::OperatorNode::OP_TERNARY_IF: {
// x IF a ELSE y operator with early out on failure
int res = _parse_expression(codegen, on->arguments[0], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen, on->arguments[1], p_stack_level);
if (res < 0)
return res;
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(res);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
int jump_past_pos = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.opcodes.write[jump_fail_pos] = codegen.opcodes.size();
res = _parse_expression(codegen, on->arguments[2], p_stack_level);
if (res < 0)
return res;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(res);
codegen.opcodes.write[jump_past_pos] = codegen.opcodes.size();
return p_stack_level | GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS;
} break;
//unary operators
case GDScriptParser::OperatorNode::OP_NEG: {
if (!_create_unary_operator(codegen, on, Variant::OP_NEGATE, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_POS: {
if (!_create_unary_operator(codegen, on, Variant::OP_POSITIVE, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_NOT: {
if (!_create_unary_operator(codegen, on, Variant::OP_NOT, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_BIT_INVERT: {
if (!_create_unary_operator(codegen, on, Variant::OP_BIT_NEGATE, p_stack_level))
return -1;
} break;
//binary operators (in precedence order)
case GDScriptParser::OperatorNode::OP_IN: {
if (!_create_binary_operator(codegen, on, Variant::OP_IN, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_EQUAL, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_NOT_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_NOT_EQUAL, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_LESS: {
if (!_create_binary_operator(codegen, on, Variant::OP_LESS, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_LESS_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_LESS_EQUAL, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_GREATER: {
if (!_create_binary_operator(codegen, on, Variant::OP_GREATER, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_GREATER_EQUAL: {
if (!_create_binary_operator(codegen, on, Variant::OP_GREATER_EQUAL, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_ADD: {
if (!_create_binary_operator(codegen, on, Variant::OP_ADD, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_SUB: {
if (!_create_binary_operator(codegen, on, Variant::OP_SUBTRACT, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_MUL: {
if (!_create_binary_operator(codegen, on, Variant::OP_MULTIPLY, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_DIV: {
if (!_create_binary_operator(codegen, on, Variant::OP_DIVIDE, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_MOD: {
if (!_create_binary_operator(codegen, on, Variant::OP_MODULE, p_stack_level))
return -1;
} break;
//case GDScriptParser::OperatorNode::OP_SHIFT_LEFT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_LEFT,p_stack_level)) return -1;} break;
//case GDScriptParser::OperatorNode::OP_SHIFT_RIGHT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_RIGHT,p_stack_level)) return -1;} break;
case GDScriptParser::OperatorNode::OP_BIT_AND: {
if (!_create_binary_operator(codegen, on, Variant::OP_BIT_AND, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_BIT_OR: {
if (!_create_binary_operator(codegen, on, Variant::OP_BIT_OR, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_BIT_XOR: {
if (!_create_binary_operator(codegen, on, Variant::OP_BIT_XOR, p_stack_level))
return -1;
} break;
//shift
case GDScriptParser::OperatorNode::OP_SHIFT_LEFT: {
if (!_create_binary_operator(codegen, on, Variant::OP_SHIFT_LEFT, p_stack_level))
return -1;
} break;
case GDScriptParser::OperatorNode::OP_SHIFT_RIGHT: {
if (!_create_binary_operator(codegen, on, Variant::OP_SHIFT_RIGHT, p_stack_level))
return -1;
} break;
//assignment operators
case GDScriptParser::OperatorNode::OP_ASSIGN_ADD:
case GDScriptParser::OperatorNode::OP_ASSIGN_SUB:
case GDScriptParser::OperatorNode::OP_ASSIGN_MUL:
case GDScriptParser::OperatorNode::OP_ASSIGN_DIV:
case GDScriptParser::OperatorNode::OP_ASSIGN_MOD:
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case GDScriptParser::OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_AND:
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_OR:
case GDScriptParser::OperatorNode::OP_ASSIGN_BIT_XOR:
case GDScriptParser::OperatorNode::OP_INIT_ASSIGN:
case GDScriptParser::OperatorNode::OP_ASSIGN: {
ERR_FAIL_COND_V(on->arguments.size() != 2, -1);
if (on->arguments[0]->type == GDScriptParser::Node::TYPE_OPERATOR && (static_cast<GDScriptParser::OperatorNode *>(on->arguments[0])->op == GDScriptParser::OperatorNode::OP_INDEX || static_cast<GDScriptParser::OperatorNode *>(on->arguments[0])->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED)) {
// SET (chained) MODE!
#ifdef DEBUG_ENABLED
if (static_cast<GDScriptParser::OperatorNode *>(on->arguments[0])->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED) {
const GDScriptParser::OperatorNode *inon = static_cast<GDScriptParser::OperatorNode *>(on->arguments[0]);
if (inon->arguments[0]->type == GDScriptParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
const Map<StringName, GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(static_cast<GDScriptParser::IdentifierNode *>(inon->arguments[1])->name);
if (MI && MI->get().setter == codegen.function_node->name) {
String n = static_cast<GDScriptParser::IdentifierNode *>(inon->arguments[1])->name;
_set_error("Must use '" + n + "' instead of 'self." + n + "' in setter.", inon);
return -1;
}
}
}
#endif
int slevel = p_stack_level;
GDScriptParser::OperatorNode *op = static_cast<GDScriptParser::OperatorNode *>(on->arguments[0]);
/* Find chain of sets */
StringName assign_property;
List<GDScriptParser::OperatorNode *> chain;
{
//create get/set chain
GDScriptParser::OperatorNode *n = op;
while (true) {
chain.push_back(n);
if (n->arguments[0]->type != GDScriptParser::Node::TYPE_OPERATOR) {
//check for a built-in property
if (n->arguments[0]->type == GDScriptParser::Node::TYPE_IDENTIFIER) {
GDScriptParser::IdentifierNode *identifier = static_cast<GDScriptParser::IdentifierNode *>(n->arguments[0]);
if (_is_class_member_property(codegen, identifier->name)) {
assign_property = identifier->name;
}
}
break;
}
n = static_cast<GDScriptParser::OperatorNode *>(n->arguments[0]);
if (n->op != GDScriptParser::OperatorNode::OP_INDEX && n->op != GDScriptParser::OperatorNode::OP_INDEX_NAMED)
break;
}
}
/* Chain of gets */
//get at (potential) root stack pos, so it can be returned
int prev_pos = _parse_expression(codegen, chain.back()->get()->arguments[0], slevel);
if (prev_pos < 0)
return prev_pos;
int retval = prev_pos;
if (retval & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
Vector<int> setchain;
if (assign_property != StringName()) {
// recover and assign at the end, this allows stuff like
// position.x+=2.0
// in Node2D
setchain.push_back(prev_pos);
setchain.push_back(codegen.get_name_map_pos(assign_property));
setchain.push_back(GDScriptFunction::OPCODE_SET_MEMBER);
}
for (List<GDScriptParser::OperatorNode *>::Element *E = chain.back(); E; E = E->prev()) {
if (E == chain.front()) //ignore first
break;
bool named = E->get()->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED;
int key_idx;
if (named) {
key_idx = codegen.get_name_map_pos(static_cast<const GDScriptParser::IdentifierNode *>(E->get()->arguments[1])->name);
//printf("named key %x\n",key_idx);
} else {
if (prev_pos & (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)) {
slevel++;
codegen.alloc_stack(slevel);
}
GDScriptParser::Node *key = E->get()->arguments[1];
key_idx = _parse_expression(codegen, key, slevel);
//printf("expr key %x\n",key_idx);
//stack was raised here if retval was stack but..
}
if (key_idx < 0) //error
return key_idx;
codegen.opcodes.push_back(named ? GDScriptFunction::OPCODE_GET_NAMED : GDScriptFunction::OPCODE_GET);
codegen.opcodes.push_back(prev_pos);
codegen.opcodes.push_back(key_idx);
slevel++;
codegen.alloc_stack(slevel);
int dst_pos = (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) | slevel;
codegen.opcodes.push_back(dst_pos);
//add in reverse order, since it will be reverted
setchain.push_back(dst_pos);
setchain.push_back(key_idx);
setchain.push_back(prev_pos);
setchain.push_back(named ? GDScriptFunction::OPCODE_SET_NAMED : GDScriptFunction::OPCODE_SET);
prev_pos = dst_pos;
}
setchain.invert();
int set_index;
bool named = false;
if (op->op == GDScriptParser::OperatorNode::OP_INDEX_NAMED) {
set_index = codegen.get_name_map_pos(static_cast<const GDScriptParser::IdentifierNode *>(op->arguments[1])->name);
named = true;
} else {
set_index = _parse_expression(codegen, op->arguments[1], slevel + 1);
named = false;
}
if (set_index < 0) //error
return set_index;
if (set_index & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
int set_value = _parse_assign_right_expression(codegen, on, slevel + 1, named ? 0 : set_index);
if (set_value < 0) //error
return set_value;
codegen.opcodes.push_back(named ? GDScriptFunction::OPCODE_SET_NAMED : GDScriptFunction::OPCODE_SET);
codegen.opcodes.push_back(prev_pos);
codegen.opcodes.push_back(set_index);
codegen.opcodes.push_back(set_value);
for (int i = 0; i < setchain.size(); i++) {
codegen.opcodes.push_back(setchain[i]);
}
return retval;
} else if (on->arguments[0]->type == GDScriptParser::Node::TYPE_IDENTIFIER && _is_class_member_property(codegen, static_cast<GDScriptParser::IdentifierNode *>(on->arguments[0])->name)) {
//assignment to member property
int slevel = p_stack_level;
int src_address = _parse_assign_right_expression(codegen, on, slevel);
if (src_address < 0)
return -1;
StringName name = static_cast<GDScriptParser::IdentifierNode *>(on->arguments[0])->name;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_SET_MEMBER);
codegen.opcodes.push_back(codegen.get_name_map_pos(name));
codegen.opcodes.push_back(src_address);
return GDScriptFunction::ADDR_TYPE_NIL << GDScriptFunction::ADDR_BITS;
} else {
//REGULAR ASSIGNMENT MODE!!
int slevel = p_stack_level;
int dst_address_a = _parse_expression(codegen, on->arguments[0], slevel, false, on->op == GDScriptParser::OperatorNode::OP_INIT_ASSIGN);
if (dst_address_a < 0)
return -1;
if (dst_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
int src_address_b = _parse_assign_right_expression(codegen, on, slevel);
if (src_address_b < 0)
return -1;
GDScriptDataType assign_type = _gdtype_from_datatype(on->arguments[0]->get_datatype());
if (assign_type.has_type && !on->datatype.has_type) {
// Typed assignment
switch (assign_type.kind) {
case GDScriptDataType::BUILTIN: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TYPED_BUILTIN); // perform operator
codegen.opcodes.push_back(assign_type.builtin_type); // variable type
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2
} break;
case GDScriptDataType::NATIVE: {
int class_idx;
if (GDScriptLanguage::get_singleton()->get_global_map().has(assign_type.native_type)) {
class_idx = GDScriptLanguage::get_singleton()->get_global_map()[assign_type.native_type];
class_idx |= (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
} else {
_set_error("Invalid native class type '" + String(assign_type.native_type) + "'.", on->arguments[0]);
return -1;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TYPED_NATIVE); // perform operator
codegen.opcodes.push_back(class_idx); // variable type
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2
} break;
case GDScriptDataType::SCRIPT:
case GDScriptDataType::GDSCRIPT: {
Variant script = assign_type.script_type;
int idx = codegen.get_constant_pos(script);
idx |= GDScriptFunction::ADDR_TYPE_LOCAL_CONSTANT << GDScriptFunction::ADDR_BITS; //make it a local constant (faster access)
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN_TYPED_SCRIPT); // perform operator
codegen.opcodes.push_back(idx); // variable type
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2
} break;
default: {
ERR_PRINT("Compiler bug: unresolved assign.");
// Shouldn't get here, but fail-safe to a regular assignment
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN); // perform operator
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
}
}
} else {
// Either untyped assignment or already type-checked by the parser
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN); // perform operator
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
}
return dst_address_a; //if anything, returns wathever was assigned or correct stack position
}
} break;
case GDScriptParser::OperatorNode::OP_IS: {
ERR_FAIL_COND_V(on->arguments.size() != 2, false);
int slevel = p_stack_level;
int src_address_a = _parse_expression(codegen, on->arguments[0], slevel);
if (src_address_a < 0)
return -1;
if (src_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)
slevel++; //uses stack for return, increase stack
int src_address_b = _parse_expression(codegen, on->arguments[1], slevel);
if (src_address_b < 0)
return -1;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_EXTENDS_TEST); // perform operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
} break;
case GDScriptParser::OperatorNode::OP_IS_BUILTIN: {
ERR_FAIL_COND_V(on->arguments.size() != 2, false);
ERR_FAIL_COND_V(on->arguments[1]->type != GDScriptParser::Node::TYPE_TYPE, false);
int slevel = p_stack_level;
int src_address_a = _parse_expression(codegen, on->arguments[0], slevel);
if (src_address_a < 0)
return -1;
if (src_address_a & GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS)
slevel++; //uses stack for return, increase stack
const GDScriptParser::TypeNode *tn = static_cast<const GDScriptParser::TypeNode *>(on->arguments[1]);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_IS_BUILTIN); // perform operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back((int)tn->vtype); // argument 2 (unary only takes one parameter)
} break;
default: {
ERR_FAIL_V_MSG(0, "Bug in bytecode compiler, unexpected operator #" + itos(on->op) + " in parse tree while parsing expression."); //unreachable code
} break;
}
int dst_addr = (p_stack_level) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
//TYPE_TYPE,
default: {
ERR_FAIL_V_MSG(-1, "Bug in bytecode compiler, unexpected node in parse tree while parsing expression."); //unreachable code
} break;
}
}
Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::BlockNode *p_block, int p_stack_level, int p_break_addr, int p_continue_addr) {
codegen.push_stack_identifiers();
int new_identifiers = 0;
codegen.current_line = p_block->line;
for (int i = 0; i < p_block->statements.size(); i++) {
const GDScriptParser::Node *s = p_block->statements[i];
switch (s->type) {
case GDScriptParser::Node::TYPE_NEWLINE: {
#ifdef DEBUG_ENABLED
const GDScriptParser::NewLineNode *nl = static_cast<const GDScriptParser::NewLineNode *>(s);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_LINE);
codegen.opcodes.push_back(nl->line);
codegen.current_line = nl->line;
#endif
} break;
case GDScriptParser::Node::TYPE_CONTROL_FLOW: {
// try subblocks
const GDScriptParser::ControlFlowNode *cf = static_cast<const GDScriptParser::ControlFlowNode *>(s);
switch (cf->cf_type) {
case GDScriptParser::ControlFlowNode::CF_MATCH: {
GDScriptParser::MatchNode *match = cf->match;
GDScriptParser::IdentifierNode *id = memnew(GDScriptParser::IdentifierNode);
id->name = "#match_value";
// var #match_value
// copied because there is no _parse_statement :(
codegen.add_stack_identifier(id->name, p_stack_level++);
codegen.alloc_stack(p_stack_level);
new_identifiers++;
GDScriptParser::OperatorNode *op = memnew(GDScriptParser::OperatorNode);
op->op = GDScriptParser::OperatorNode::OP_ASSIGN;
op->arguments.push_back(id);
op->arguments.push_back(match->val_to_match);
int ret = _parse_expression(codegen, op, p_stack_level);
if (ret < 0) {
memdelete(id);
memdelete(op);
return ERR_PARSE_ERROR;
}
// break address
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int break_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0); // break addr
for (int j = 0; j < match->compiled_pattern_branches.size(); j++) {
GDScriptParser::MatchNode::CompiledPatternBranch branch = match->compiled_pattern_branches[j];
// jump over continue
// jump unconditionally
// continue address
// compile the condition
int ret2 = _parse_expression(codegen, branch.compiled_pattern, p_stack_level);
if (ret2 < 0) {
memdelete(id);
memdelete(op);
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(ret2);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int continue_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0);
Error err = _parse_block(codegen, branch.body, p_stack_level, p_break_addr, continue_addr);
if (err) {
memdelete(id);
memdelete(op);
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(break_addr);
codegen.opcodes.write[continue_addr + 1] = codegen.opcodes.size();
}
codegen.opcodes.write[break_addr + 1] = codegen.opcodes.size();
memdelete(id);
memdelete(op);
} break;
case GDScriptParser::ControlFlowNode::CF_IF: {
int ret2 = _parse_expression(codegen, cf->arguments[0], p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(ret2);
int else_addr = codegen.opcodes.size();
codegen.opcodes.push_back(0); //temporary
Error err = _parse_block(codegen, cf->body, p_stack_level, p_break_addr, p_continue_addr);
if (err)
return err;
if (cf->body_else) {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
int end_addr = codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.opcodes.write[else_addr] = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_LINE);
codegen.opcodes.push_back(cf->body_else->line);
codegen.current_line = cf->body_else->line;
Error err2 = _parse_block(codegen, cf->body_else, p_stack_level, p_break_addr, p_continue_addr);
if (err2)
return err2;
codegen.opcodes.write[end_addr] = codegen.opcodes.size();
} else {
//end without else
codegen.opcodes.write[else_addr] = codegen.opcodes.size();
}
} break;
case GDScriptParser::ControlFlowNode::CF_FOR: {
int slevel = p_stack_level;
int iter_stack_pos = slevel;
int iterator_pos = (slevel++) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
int counter_pos = (slevel++) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
int container_pos = (slevel++) | (GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS);
codegen.alloc_stack(slevel);
codegen.push_stack_identifiers();
codegen.add_stack_identifier(static_cast<const GDScriptParser::IdentifierNode *>(cf->arguments[0])->name, iter_stack_pos);
int ret2 = _parse_expression(codegen, cf->arguments[1], slevel, false);
if (ret2 < 0)
return ERR_COMPILATION_FAILED;
//assign container
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(ret2);
//begin loop
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ITERATE_BEGIN);
codegen.opcodes.push_back(counter_pos);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(codegen.opcodes.size() + 4);
codegen.opcodes.push_back(iterator_pos);
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP); //skip code for next
codegen.opcodes.push_back(codegen.opcodes.size() + 8);
//break loop
int break_pos = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP); //skip code for next
codegen.opcodes.push_back(0); //skip code for next
//next loop
int continue_pos = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ITERATE);
codegen.opcodes.push_back(counter_pos);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(break_pos);
codegen.opcodes.push_back(iterator_pos);
Error err = _parse_block(codegen, cf->body, slevel, break_pos, continue_pos);
if (err)
return err;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(continue_pos);
codegen.opcodes.write[break_pos + 1] = codegen.opcodes.size();
codegen.pop_stack_identifiers();
} break;
case GDScriptParser::ControlFlowNode::CF_WHILE: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size() + 3);
int break_addr = codegen.opcodes.size();
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0);
int continue_addr = codegen.opcodes.size();
int ret2 = _parse_expression(codegen, cf->arguments[0], p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(ret2);
codegen.opcodes.push_back(break_addr);
Error err = _parse_block(codegen, cf->body, p_stack_level, break_addr, continue_addr);
if (err)
return err;
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(continue_addr);
codegen.opcodes.write[break_addr + 1] = codegen.opcodes.size();
} break;
case GDScriptParser::ControlFlowNode::CF_BREAK: {
if (p_break_addr < 0) {
_set_error("'break'' not within loop", cf);
return ERR_COMPILATION_FAILED;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(p_break_addr);
} break;
case GDScriptParser::ControlFlowNode::CF_CONTINUE: {
if (p_continue_addr < 0) {
_set_error("'continue' not within loop", cf);
return ERR_COMPILATION_FAILED;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP);
codegen.opcodes.push_back(p_continue_addr);
} break;
case GDScriptParser::ControlFlowNode::CF_RETURN: {
int ret2;
if (cf->arguments.size()) {
ret2 = _parse_expression(codegen, cf->arguments[0], p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
} else {
ret2 = GDScriptFunction::ADDR_TYPE_NIL << GDScriptFunction::ADDR_BITS;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_RETURN);
codegen.opcodes.push_back(ret2);
} break;
}
} break;
case GDScriptParser::Node::TYPE_ASSERT: {
#ifdef DEBUG_ENABLED
// try subblocks
const GDScriptParser::AssertNode *as = static_cast<const GDScriptParser::AssertNode *>(s);
int ret2 = _parse_expression(codegen, as->condition, p_stack_level, false);
if (ret2 < 0)
return ERR_PARSE_ERROR;
int message_ret = 0;
if (as->message) {
message_ret = _parse_expression(codegen, as->message, p_stack_level + 1, false);
if (message_ret < 0)
return ERR_PARSE_ERROR;
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_ASSERT);
codegen.opcodes.push_back(ret2);
codegen.opcodes.push_back(message_ret);
#endif
} break;
case GDScriptParser::Node::TYPE_BREAKPOINT: {
#ifdef DEBUG_ENABLED
// try subblocks
codegen.opcodes.push_back(GDScriptFunction::OPCODE_BREAKPOINT);
#endif
} break;
case GDScriptParser::Node::TYPE_LOCAL_VAR: {
const GDScriptParser::LocalVarNode *lv = static_cast<const GDScriptParser::LocalVarNode *>(s);
// since we are using properties now for most class access, allow shadowing of class members to make user's life easier.
//
//if (_is_class_member_property(codegen, lv->name)) {
// _set_error("Name for local variable '" + String(lv->name) + "' can't shadow class property of the same name.", lv);
// return ERR_ALREADY_EXISTS;
//}
codegen.add_stack_identifier(lv->name, p_stack_level++);
codegen.alloc_stack(p_stack_level);
new_identifiers++;
} break;
default: {
//expression
int ret2 = _parse_expression(codegen, s, p_stack_level, true);
if (ret2 < 0)
return ERR_PARSE_ERROR;
} break;
}
}
codegen.pop_stack_identifiers();
return OK;
}
Error GDScriptCompiler::_parse_function(GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::FunctionNode *p_func, bool p_for_ready) {
Vector<int> bytecode;
CodeGen codegen;
codegen.class_node = p_class;
codegen.script = p_script;
codegen.function_node = p_func;
codegen.stack_max = 0;
codegen.current_line = 0;
codegen.call_max = 0;
codegen.debug_stack = ScriptDebugger::get_singleton() != NULL;
Vector<StringName> argnames;
int stack_level = 0;
if (p_func) {
for (int i = 0; i < p_func->arguments.size(); i++) {
// since we are using properties now for most class access, allow shadowing of class members to make user's life easier.
//
//if (_is_class_member_property(p_script, p_func->arguments[i])) {
// _set_error("Name for argument '" + String(p_func->arguments[i]) + "' can't shadow class property of the same name.", p_func);
// return ERR_ALREADY_EXISTS;
//}
codegen.add_stack_identifier(p_func->arguments[i], i);
#ifdef TOOLS_ENABLED
argnames.push_back(p_func->arguments[i]);
#endif
}
stack_level = p_func->arguments.size();
}
codegen.alloc_stack(stack_level);
/* Parse initializer -if applies- */
bool is_initializer = !p_for_ready && !p_func;
if (is_initializer || (p_func && String(p_func->name) == "_init")) {
//parse initializer for class members
if (!p_func && p_class->extends_used && p_script->native.is_null()) {
//call implicit parent constructor
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CALL_SELF_BASE);
codegen.opcodes.push_back(codegen.get_name_map_pos("_init"));
codegen.opcodes.push_back(0);
codegen.opcodes.push_back((GDScriptFunction::ADDR_TYPE_STACK << GDScriptFunction::ADDR_BITS) | 0);
}
Error err = _parse_block(codegen, p_class->initializer, stack_level);
if (err)
return err;
is_initializer = true;
}
if (p_for_ready || (p_func && String(p_func->name) == "_ready")) {
//parse initializer for class members
if (p_class->ready->statements.size()) {
Error err = _parse_block(codegen, p_class->ready, stack_level);
if (err)
return err;
}
}
/* Parse default argument code -if applies- */
Vector<int> defarg_addr;
StringName func_name;
if (p_func) {
if (p_func->default_values.size()) {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_JUMP_TO_DEF_ARGUMENT);
defarg_addr.push_back(codegen.opcodes.size());
for (int i = 0; i < p_func->default_values.size(); i++) {
_parse_expression(codegen, p_func->default_values[i], stack_level, true);
defarg_addr.push_back(codegen.opcodes.size());
}
defarg_addr.invert();
}
Error err = _parse_block(codegen, p_func->body, stack_level);
if (err)
return err;
func_name = p_func->name;
} else {
if (p_for_ready)
func_name = "_ready";
else
func_name = "_init";
}
codegen.opcodes.push_back(GDScriptFunction::OPCODE_END);
/*
if (String(p_func->name)=="") { //initializer func
gdfunc = &p_script->initializer;
*/
//} else { //regular func
p_script->member_functions[func_name] = memnew(GDScriptFunction);
GDScriptFunction *gdfunc = p_script->member_functions[func_name];
//}
if (p_func) {
gdfunc->_static = p_func->_static;
gdfunc->rpc_mode = p_func->rpc_mode;
gdfunc->argument_types.resize(p_func->argument_types.size());
for (int i = 0; i < p_func->argument_types.size(); i++) {
gdfunc->argument_types.write[i] = _gdtype_from_datatype(p_func->argument_types[i], p_script);
}
gdfunc->return_type = _gdtype_from_datatype(p_func->return_type, p_script);
} else {
gdfunc->_static = false;
gdfunc->rpc_mode = MultiplayerAPI::RPC_MODE_DISABLED;
gdfunc->return_type = GDScriptDataType();
gdfunc->return_type.has_type = true;
gdfunc->return_type.kind = GDScriptDataType::BUILTIN;
gdfunc->return_type.builtin_type = Variant::NIL;
}
#ifdef TOOLS_ENABLED
gdfunc->arg_names = argnames;
#endif
//constants
if (codegen.constant_map.size()) {
gdfunc->_constant_count = codegen.constant_map.size();
gdfunc->constants.resize(codegen.constant_map.size());
gdfunc->_constants_ptr = gdfunc->constants.ptrw();
const Variant *K = NULL;
while ((K = codegen.constant_map.next(K))) {
int idx = codegen.constant_map[*K];
gdfunc->constants.write[idx] = *K;
}
} else {
gdfunc->_constants_ptr = NULL;
gdfunc->_constant_count = 0;
}
//global names
if (codegen.name_map.size()) {
gdfunc->global_names.resize(codegen.name_map.size());
gdfunc->_global_names_ptr = &gdfunc->global_names[0];
for (Map<StringName, int>::Element *E = codegen.name_map.front(); E; E = E->next()) {
gdfunc->global_names.write[E->get()] = E->key();
}
gdfunc->_global_names_count = gdfunc->global_names.size();
} else {
gdfunc->_global_names_ptr = NULL;
gdfunc->_global_names_count = 0;
}
#ifdef TOOLS_ENABLED
// Named globals
if (codegen.named_globals.size()) {
gdfunc->named_globals.resize(codegen.named_globals.size());
gdfunc->_named_globals_ptr = gdfunc->named_globals.ptr();
for (int i = 0; i < codegen.named_globals.size(); i++) {
gdfunc->named_globals.write[i] = codegen.named_globals[i];
}
gdfunc->_named_globals_count = gdfunc->named_globals.size();
}
#endif
if (codegen.opcodes.size()) {
gdfunc->code = codegen.opcodes;
gdfunc->_code_ptr = &gdfunc->code[0];
gdfunc->_code_size = codegen.opcodes.size();
} else {
gdfunc->_code_ptr = NULL;
gdfunc->_code_size = 0;
}
if (defarg_addr.size()) {
gdfunc->default_arguments = defarg_addr;
gdfunc->_default_arg_count = defarg_addr.size() - 1;
gdfunc->_default_arg_ptr = &gdfunc->default_arguments[0];
} else {
gdfunc->_default_arg_count = 0;
gdfunc->_default_arg_ptr = NULL;
}
gdfunc->_argument_count = p_func ? p_func->arguments.size() : 0;
gdfunc->_stack_size = codegen.stack_max;
gdfunc->_call_size = codegen.call_max;
gdfunc->name = func_name;
#ifdef DEBUG_ENABLED
if (ScriptDebugger::get_singleton()) {
String signature;
//path
if (p_script->get_path() != String())
signature += p_script->get_path();
//loc
if (p_func) {
signature += "::" + itos(p_func->body->line);
} else {
signature += "::0";
}
//function and class
if (p_class->name) {
signature += "::" + String(p_class->name) + "." + String(func_name);
} else {
signature += "::" + String(func_name);
}
gdfunc->profile.signature = signature;
}
#endif
gdfunc->_script = p_script;
gdfunc->source = source;
#ifdef DEBUG_ENABLED
{
gdfunc->func_cname = (String(source) + " - " + String(func_name)).utf8();
gdfunc->_func_cname = gdfunc->func_cname.get_data();
}
#endif
if (p_func) {
gdfunc->_initial_line = p_func->line;
#ifdef TOOLS_ENABLED
p_script->member_lines[func_name] = p_func->line;
#endif
} else {
gdfunc->_initial_line = 0;
}
if (codegen.debug_stack)
gdfunc->stack_debug = codegen.stack_debug;
if (is_initializer)
p_script->initializer = gdfunc;
return OK;
}
Error GDScriptCompiler::_parse_class_level(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
parsing_classes.insert(p_script);
if (p_class->owner && p_class->owner->owner) {
// Owner is not root
if (!parsed_classes.has(p_script->_owner)) {
if (parsing_classes.has(p_script->_owner)) {
_set_error("Cyclic class reference for '" + String(p_class->name) + "'.", p_class);
return ERR_PARSE_ERROR;
}
Error err = _parse_class_level(p_script->_owner, p_class->owner, p_keep_state);
if (err) {
return err;
}
}
}
p_script->native = Ref<GDScriptNativeClass>();
p_script->base = Ref<GDScript>();
p_script->_base = NULL;
p_script->members.clear();
p_script->constants.clear();
for (Map<StringName, GDScriptFunction *>::Element *E = p_script->member_functions.front(); E; E = E->next()) {
memdelete(E->get());
}
p_script->member_functions.clear();
p_script->member_indices.clear();
p_script->member_info.clear();
p_script->_signals.clear();
p_script->initializer = NULL;
p_script->tool = p_class->tool;
p_script->name = p_class->name;
Ref<GDScriptNativeClass> native;
GDScriptDataType base_type = _gdtype_from_datatype(p_class->base_type);
// Inheritance
switch (base_type.kind) {
case GDScriptDataType::NATIVE: {
int native_idx = GDScriptLanguage::get_singleton()->get_global_map()[base_type.native_type];
native = GDScriptLanguage::get_singleton()->get_global_array()[native_idx];
ERR_FAIL_COND_V(native.is_null(), ERR_BUG);
p_script->native = native;
} break;
case GDScriptDataType::GDSCRIPT: {
Ref<GDScript> base = Ref<Script>(base_type.script_type);
p_script->base = base;
p_script->_base = base.ptr();
p_script->member_indices = base->member_indices;
if (p_class->base_type.kind == GDScriptParser::DataType::CLASS) {
if (!parsed_classes.has(p_script->_base)) {
if (parsing_classes.has(p_script->_base)) {
_set_error("Cyclic class reference for '" + String(p_class->name) + "'.", p_class);
return ERR_PARSE_ERROR;
}
Error err = _parse_class_level(p_script->_base, p_class->base_type.class_type, p_keep_state);
if (err) {
return err;
}
}
}
} break;
default: {
_set_error("Parser bug: invalid inheritance.", p_class);
return ERR_BUG;
} break;
}
for (int i = 0; i < p_class->variables.size(); i++) {
StringName name = p_class->variables[i].identifier;
GDScript::MemberInfo minfo;
minfo.index = p_script->member_indices.size();
minfo.setter = p_class->variables[i].setter;
minfo.getter = p_class->variables[i].getter;
minfo.rpc_mode = p_class->variables[i].rpc_mode;
minfo.data_type = _gdtype_from_datatype(p_class->variables[i].data_type, p_script);
PropertyInfo prop_info = minfo.data_type;
prop_info.name = name;
PropertyInfo export_info = p_class->variables[i]._export;
if (export_info.type != Variant::NIL) {
if (!minfo.data_type.has_type) {
prop_info.type = export_info.type;
prop_info.class_name = export_info.class_name;
}
prop_info.hint = export_info.hint;
prop_info.hint_string = export_info.hint_string;
prop_info.usage = export_info.usage;
#ifdef TOOLS_ENABLED
if (p_class->variables[i].default_value.get_type() != Variant::NIL) {
p_script->member_default_values[name] = p_class->variables[i].default_value;
}
#endif
} else {
prop_info.usage = PROPERTY_USAGE_SCRIPT_VARIABLE;
}
p_script->member_info[name] = prop_info;
p_script->member_indices[name] = minfo;
p_script->members.insert(name);
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = p_class->variables[i].line;
#endif
}
for (Map<StringName, GDScriptParser::ClassNode::Constant>::Element *E = p_class->constant_expressions.front(); E; E = E->next()) {
StringName name = E->key();
ERR_CONTINUE(E->get().expression->type != GDScriptParser::Node::TYPE_CONSTANT);
GDScriptParser::ConstantNode *constant = static_cast<GDScriptParser::ConstantNode *>(E->get().expression);
p_script->constants.insert(name, constant->value);
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = E->get().expression->line;
#endif
}
for (int i = 0; i < p_class->_signals.size(); i++) {
StringName name = p_class->_signals[i].name;
GDScript *c = p_script;
while (c) {
if (c->_signals.has(name)) {
_set_error("Signal '" + name + "' redefined (in current or parent class)", p_class);
return ERR_ALREADY_EXISTS;
}
if (c->base.is_valid()) {
c = c->base.ptr();
} else {
c = NULL;
}
}
if (native.is_valid()) {
if (ClassDB::has_signal(native->get_name(), name)) {
_set_error("Signal '" + name + "' redefined (original in native class '" + String(native->get_name()) + "')", p_class);
return ERR_ALREADY_EXISTS;
}
}
p_script->_signals[name] = p_class->_signals[i].arguments;
}
parsed_classes.insert(p_script);
parsing_classes.erase(p_script);
//parse sub-classes
for (int i = 0; i < p_class->subclasses.size(); i++) {
StringName name = p_class->subclasses[i]->name;
Ref<GDScript> &subclass = p_script->subclasses[name];
GDScript *subclass_ptr = subclass.ptr();
// Subclass might still be parsing, just skip it
if (!parsed_classes.has(subclass_ptr) && !parsing_classes.has(subclass_ptr)) {
Error err = _parse_class_level(subclass_ptr, p_class->subclasses[i], p_keep_state);
if (err)
return err;
}
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = p_class->subclasses[i]->line;
#endif
p_script->constants.insert(name, subclass); //once parsed, goes to the list of constants
}
return OK;
}
Error GDScriptCompiler::_parse_class_blocks(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
//parse methods
bool has_initializer = false;
bool has_ready = false;
for (int i = 0; i < p_class->functions.size(); i++) {
if (!has_initializer && p_class->functions[i]->name == "_init")
has_initializer = true;
if (!has_ready && p_class->functions[i]->name == "_ready")
has_ready = true;
Error err = _parse_function(p_script, p_class, p_class->functions[i]);
if (err)
return err;
}
//parse static methods
for (int i = 0; i < p_class->static_functions.size(); i++) {
Error err = _parse_function(p_script, p_class, p_class->static_functions[i]);
if (err)
return err;
}
if (!has_initializer) {
//create a constructor
Error err = _parse_function(p_script, p_class, NULL);
if (err)
return err;
}
if (!has_ready && p_class->ready->statements.size()) {
//create a constructor
Error err = _parse_function(p_script, p_class, NULL, true);
if (err)
return err;
}
#ifdef DEBUG_ENABLED
//validate instances if keeping state
if (p_keep_state) {
for (Set<Object *>::Element *E = p_script->instances.front(); E;) {
Set<Object *>::Element *N = E->next();
ScriptInstance *si = E->get()->get_script_instance();
if (si->is_placeholder()) {
#ifdef TOOLS_ENABLED
PlaceHolderScriptInstance *psi = static_cast<PlaceHolderScriptInstance *>(si);
if (p_script->is_tool()) {
//re-create as an instance
p_script->placeholders.erase(psi); //remove placeholder
GDScriptInstance *instance = memnew(GDScriptInstance);
instance->base_ref = Object::cast_to<Reference>(E->get());
instance->members.resize(p_script->member_indices.size());
instance->script = Ref<GDScript>(p_script);
instance->owner = E->get();
//needed for hot reloading
for (Map<StringName, GDScript::MemberInfo>::Element *F = p_script->member_indices.front(); F; F = F->next()) {
instance->member_indices_cache[F->key()] = F->get().index;
}
instance->owner->set_script_instance(instance);
/* STEP 2, INITIALIZE AND CONSTRUCT */
Variant::CallError ce;
p_script->initializer->call(instance, NULL, 0, ce);
if (ce.error != Variant::CallError::CALL_OK) {
//well, tough luck, not goinna do anything here
}
}
#endif
} else {
GDScriptInstance *gi = static_cast<GDScriptInstance *>(si);
gi->reload_members();
}
E = N;
}
}
#endif
for (int i = 0; i < p_class->subclasses.size(); i++) {
StringName name = p_class->subclasses[i]->name;
GDScript *subclass = p_script->subclasses[name].ptr();
Error err = _parse_class_blocks(subclass, p_class->subclasses[i], p_keep_state);
if (err) {
return err;
}
}
p_script->valid = true;
return OK;
}
void GDScriptCompiler::_make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
Map<StringName, Ref<GDScript>> old_subclasses;
if (p_keep_state) {
old_subclasses = p_script->subclasses;
}
p_script->subclasses.clear();
for (int i = 0; i < p_class->subclasses.size(); i++) {
StringName name = p_class->subclasses[i]->name;
Ref<GDScript> subclass;
String fully_qualified_name = p_script->fully_qualified_name + "::" + name;
if (old_subclasses.has(name)) {
subclass = old_subclasses[name];
} else {
Ref<GDScript> orphan_subclass = GDScriptLanguage::get_singleton()->get_orphan_subclass(fully_qualified_name);
if (orphan_subclass.is_valid()) {
subclass = orphan_subclass;
} else {
subclass.instance();
}
}
subclass->_owner = p_script;
subclass->fully_qualified_name = fully_qualified_name;
p_script->subclasses.insert(name, subclass);
_make_scripts(subclass.ptr(), p_class->subclasses[i], false);
}
}
Error GDScriptCompiler::compile(const GDScriptParser *p_parser, GDScript *p_script, bool p_keep_state) {
err_line = -1;
err_column = -1;
error = "";
parser = p_parser;
main_script = p_script;
const GDScriptParser::Node *root = parser->get_parse_tree();
ERR_FAIL_COND_V(root->type != GDScriptParser::Node::TYPE_CLASS, ERR_INVALID_DATA);
source = p_script->get_path();
// The best fully qualified name for a base level script is its file path
p_script->fully_qualified_name = p_script->path;
// Create scripts for subclasses beforehand so they can be referenced
_make_scripts(p_script, static_cast<const GDScriptParser::ClassNode *>(root), p_keep_state);
p_script->_owner = NULL;
Error err = _parse_class_level(p_script, static_cast<const GDScriptParser::ClassNode *>(root), p_keep_state);
if (err)
return err;
err = _parse_class_blocks(p_script, static_cast<const GDScriptParser::ClassNode *>(root), p_keep_state);
if (err)
return err;
return OK;
}
String GDScriptCompiler::get_error() const {
return error;
}
int GDScriptCompiler::get_error_line() const {
return err_line;
}
int GDScriptCompiler::get_error_column() const {
return err_column;
}
GDScriptCompiler::GDScriptCompiler() {
}
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