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Add typed instructions to GDScript 

- Typed assignment (built-in, native, and script).
- Cast (built-in conversion; native and script checks).
- Check type of functions arguments on call.
- Check type of members on set.
This commit is contained in:
George Marques 2018-05-29 23:16:56 -03:00
parent 743053734f
commit 4b18c4e448
No known key found for this signature in database
GPG Key ID: 046BD46A3201E43D
4 changed files with 469 additions and 10 deletions
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6
modules/gdscript/gdscript.cpp
View File

@ -941,8 +941,12 @@ bool GDScriptInstance::set(const StringName &p_name, const Variant &p_value) {
if (err.error == Variant::CallError::CALL_OK) {
return true; //function exists, call was successful
}
} else
} else {
if (!E->get().data_type.is_type(p_value)) {
return false; // Type mismatch
}
members[E->get().index] = p_value;
}
return true;
}
}

171
modules/gdscript/gdscript_compiler.cpp
View File

@ -423,7 +423,80 @@ int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::
} break;
case GDScriptParser::Node::TYPE_CAST: {
const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
return _parse_expression(codegen, cn->source_node, p_stack_level);
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);
}
switch (cn->cast_type.kind) {
case GDScriptParser::DataType::BUILTIN: {
codegen.opcodes.push_back(GDScriptFunction::OPCODE_CAST_TO_BUILTIN);
codegen.opcodes.push_back(cn->cast_type.builtin_type);
} break;
case GDScriptParser::DataType::NATIVE: {
int class_idx;
if (GDScriptLanguage::get_singleton()->get_global_map().has(cn->cast_type.native_type)) {
class_idx = GDScriptLanguage::get_singleton()->get_global_map()[cn->cast_type.native_type];
class_idx |= (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
} else {
_set_error("Invalid native class type '" + String(cn->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 GDScriptParser::DataType::CLASS: {
Variant script;
int idx = -1;
if (cn->cast_type.class_type->name == StringName()) {
script = codegen.script;
} else {
StringName name = cn->cast_type.class_type->name;
if (class_map[name] == codegen.script->subclasses[name]) {
idx = codegen.get_name_map_pos(name);
idx |= GDScriptFunction::ADDR_TYPE_CLASS_CONSTANT << GDScriptFunction::ADDR_BITS;
} else {
script = class_map[name];
}
}
if (idx < 0) {
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;
case GDScriptParser::DataType::SCRIPT:
case GDScriptParser::DataType::GDSCRIPT: {
Variant script = cn->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 adddress
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
@ -1051,12 +1124,87 @@ int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::
if (src_address_b < 0)
return -1;
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)
GDScriptParser::DataType assign_type = on->arguments[0]->get_datatype();
if (assign_type.has_type && !on->arguments[1]->get_datatype().has_type) {
// Typed assignment
switch (assign_type.kind) {
case GDScriptParser::DataType::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 GDScriptParser::DataType::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 GDScriptParser::DataType::CLASS: {
Variant script;
int idx = -1;
if (assign_type.class_type->name == StringName()) {
script = codegen.script;
} else {
StringName name = assign_type.class_type->name;
if (class_map[name] == codegen.script->subclasses[name]) {
idx = codegen.get_name_map_pos(name);
idx |= GDScriptFunction::ADDR_TYPE_CLASS_CONSTANT << GDScriptFunction::ADDR_BITS;
} else {
script = class_map[name];
}
}
if (idx < 0) {
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;
case GDScriptParser::DataType::SCRIPT:
case GDScriptParser::DataType::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: {
@ -1513,6 +1661,17 @@ Error GDScriptCompiler::_parse_function(GDScript *p_script, const GDScriptParser
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[i] = _gdtype_from_datatype(p_func->argument_types[i]);
}
gdfunc->return_type = _gdtype_from_datatype(p_func->return_type);
} 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
@ -1843,7 +2002,6 @@ Error GDScriptCompiler::_parse_class_level(GDScript *p_script, GDScript *p_owner
p_script->subclasses.insert(name, subclass);
}
p_script->valid = true;
return OK;
}
@ -1950,6 +2108,7 @@ Error GDScriptCompiler::_parse_class_blocks(GDScript *p_script, const GDScriptPa
}
}
p_script->valid = true;
return OK;
}

223
modules/gdscript/gdscript_function.cpp
View File

@ -200,6 +200,12 @@ static String _get_var_type(const Variant *p_type) {
&&OPCODE_ASSIGN, \
&&OPCODE_ASSIGN_TRUE, \
&&OPCODE_ASSIGN_FALSE, \
&&OPCODE_ASSIGN_TYPED_BUILTIN, \
&&OPCODE_ASSIGN_TYPED_NATIVE, \
&&OPCODE_ASSIGN_TYPED_SCRIPT, \
&&OPCODE_CAST_TO_BUILTIN, \
&&OPCODE_CAST_TO_NATIVE, \
&&OPCODE_CAST_TO_SCRIPT, \
&&OPCODE_CONSTRUCT, \
&&OPCODE_CONSTRUCT_ARRAY, \
&&OPCODE_CONSTRUCT_DICTIONARY, \
@ -318,10 +324,28 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
if (_stack_size) {
stack = (Variant *)aptr;
for (int i = 0; i < p_argcount; i++)
memnew_placement(&stack[i], Variant(*p_args[i]));
for (int i = p_argcount; i < _stack_size; i++)
for (int i = 0; i < p_argcount; i++) {
if (!argument_types[i].has_type) {
memnew_placement(&stack[i], Variant(*p_args[i]));
continue;
}
if (!argument_types[i].is_type(*p_args[i], true)) {
r_err.error = Variant::CallError::CALL_ERROR_INVALID_ARGUMENT;
r_err.argument = i;
r_err.expected = argument_types[i].kind == GDScriptDataType::BUILTIN ? argument_types[i].builtin_type : Variant::OBJECT;
return Variant();
}
if (argument_types[i].kind == GDScriptDataType::BUILTIN) {
Variant arg = Variant::construct(argument_types[i].builtin_type, &p_args[i], 1, r_err);
memnew_placement(&stack[i], Variant(arg));
} else {
memnew_placement(&stack[i], Variant(*p_args[i]));
}
}
for (int i = p_argcount; i < _stack_size; i++) {
memnew_placement(&stack[i], Variant);
}
} else {
stack = NULL;
}
@ -709,6 +733,199 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
}
DISPATCH_OPCODE;
OPCODE(OPCODE_ASSIGN_TYPED_BUILTIN) {
CHECK_SPACE(4);
Variant::Type var_type = (Variant::Type)_code_ptr[ip + 1];
GET_VARIANT_PTR(dst, 2);
GET_VARIANT_PTR(src, 3);
GD_ERR_BREAK(var_type < 0 || var_type >= Variant::VARIANT_MAX);
if (src->get_type() != var_type) {
err_text = "Trying to assign value of type '" + Variant::get_type_name(src->get_type()) +
"' to a variable of type '" + Variant::get_type_name(var_type) + "'.";
OPCODE_BREAK;
}
*dst = *src;
ip += 4;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_ASSIGN_TYPED_NATIVE) {
CHECK_SPACE(4);
GET_VARIANT_PTR(type, 1);
GET_VARIANT_PTR(dst, 2);
GET_VARIANT_PTR(src, 3);
GDScriptNativeClass *nc = Object::cast_to<GDScriptNativeClass>(type->operator Object *());
GD_ERR_BREAK(!nc);
Object *src_obj = src->operator Object *();
GD_ERR_BREAK(!src_obj);
if (!ClassDB::is_parent_class(src_obj->get_class_name(), nc->get_name())) {
err_text = "Trying to assign value of type '" + src_obj->get_class_name() +
"' to a variable of type '" + nc->get_name() + "'.";
OPCODE_BREAK;
}
*dst = *src;
ip += 4;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_ASSIGN_TYPED_SCRIPT) {
CHECK_SPACE(4);
GET_VARIANT_PTR(type, 1);
GET_VARIANT_PTR(dst, 2);
GET_VARIANT_PTR(src, 3);
Script *base_type = Object::cast_to<Script>(type->operator Object *());
GD_ERR_BREAK(!base_type);
if (src->get_type() != Variant::OBJECT && src->get_type() != Variant::NIL) {
err_text = "Trying to assign a non-object value to a variable of type '" + base_type->get_path().get_file() + "'.";
OPCODE_BREAK;
}
if (src->get_type() != Variant::NIL && src->operator Object *() != NULL) {
ScriptInstance *scr_inst = src->operator Object *()->get_script_instance();
if (!scr_inst) {
err_text = "Trying to assign value of type '" + src->operator Object *()->get_class_name() +
"' to a variable of type '" + base_type->get_path().get_file() + "'.";
OPCODE_BREAK;
}
Script *src_type = src->operator Object *()->get_script_instance()->get_script().ptr();
bool valid = false;
while (src_type) {
if (src_type == base_type) {
valid = true;
break;
}
src_type = src_type->get_base_script().ptr();
}
if (!valid) {
err_text = "Trying to assign value of type '" + src->operator Object *()->get_script_instance()->get_script()->get_path().get_file() +
"' to a variable of type '" + base_type->get_path().get_file() + "'.";
OPCODE_BREAK;
}
}
*dst = *src;
ip += 4;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_CAST_TO_BUILTIN) {
CHECK_SPACE(4);
Variant::Type to_type = (Variant::Type)_code_ptr[ip + 1];
GET_VARIANT_PTR(src, 2);
GET_VARIANT_PTR(dst, 3);
GD_ERR_BREAK(to_type < 0 || to_type >= Variant::VARIANT_MAX);
Variant::CallError err;
*dst = Variant::construct(to_type, (const Variant **)&src, 1, err);
#ifdef DEBUG_ENABLED
if (err.error != Variant::CallError::CALL_OK) {
err_text = "Invalid cast: could not convert value to '" + Variant::get_type_name(to_type) + "'.";
OPCODE_BREAK;
}
#endif
ip += 4;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_CAST_TO_NATIVE) {
CHECK_SPACE(4);
GET_VARIANT_PTR(to_type, 1);
GET_VARIANT_PTR(src, 2);
GET_VARIANT_PTR(dst, 3);
GDScriptNativeClass *nc = Object::cast_to<GDScriptNativeClass>(to_type->operator Object *());
GD_ERR_BREAK(!nc);
#ifdef DEBUG_ENABLED
if (src->get_type() != Variant::OBJECT && src->get_type() != Variant::NIL) {
err_text = "Invalid cast: can't convert a non-object value to an object type.";
OPCODE_BREAK;
}
#endif
Object *src_obj = src->operator Object *();
if (src_obj && !ClassDB::is_parent_class(src_obj->get_class_name(), nc->get_name())) {
*dst = Variant(); // invalid cast, assign NULL
} else {
*dst = *src;
}
ip += 4;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_CAST_TO_SCRIPT) {
CHECK_SPACE(4);
GET_VARIANT_PTR(to_type, 1);
GET_VARIANT_PTR(src, 2);
GET_VARIANT_PTR(dst, 3);
Script *base_type = Object::cast_to<Script>(to_type->operator Object *());
GD_ERR_BREAK(!base_type);
#ifdef DEBUG_ENABLED
if (src->get_type() != Variant::OBJECT && src->get_type() != Variant::NIL) {
err_text = "Trying to assign a non-object value to a variable of type '" + base_type->get_path().get_file() + "'.";
OPCODE_BREAK;
}
#endif
bool valid = false;
if (src->get_type() != Variant::NIL && src->operator Object *() != NULL) {
ScriptInstance *scr_inst = src->operator Object *()->get_script_instance();
if (scr_inst) {
Script *src_type = src->operator Object *()->get_script_instance()->get_script().ptr();
while (src_type) {
if (src_type == base_type) {
valid = true;
break;
}
src_type = src_type->get_base_script().ptr();
}
}
}
if (valid) {
*dst = *src; // Valid cast, copy the source object
} else {
*dst = Variant(); // invalid cast, assign NULL
}
ip += 4;
}
DISPATCH_OPCODE;
OPCODE(OPCODE_CONSTRUCT) {
CHECK_SPACE(2);

79
modules/gdscript/gdscript_function.h
View File

@ -54,6 +54,79 @@ struct GDScriptDataType {
StringName native_type;
Ref<Script> script_type;
bool is_type(const Variant &p_variant, bool p_allow_implicit_conversion = false) const {
if (!has_type) return true; // Can't type check
switch (kind) {
case BUILTIN: {
Variant::Type var_type = p_variant.get_type();
bool valid = builtin_type == var_type;
if (!valid && p_allow_implicit_conversion) {
valid = Variant::can_convert_strict(var_type, builtin_type);
}
return valid;
} break;
case NATIVE: {
if (p_variant.get_type() == Variant::NIL) {
return true;
}
if (p_variant.get_type() != Variant::OBJECT) {
return false;
}
Object *obj = p_variant.operator Object *();
if (obj && !ClassDB::is_parent_class(obj->get_class_name(), native_type)) {
return false;
}
return true;
} break;
case SCRIPT:
case GDSCRIPT: {
if (p_variant.get_type() == Variant::NIL) {
return true;
}
if (p_variant.get_type() != Variant::OBJECT) {
return false;
}
Object *obj = p_variant.operator Object *();
Ref<Script> base = obj && obj->get_script_instance() ? obj->get_script_instance()->get_script() : NULL;
bool valid = false;
while (base.is_valid()) {
if (base == script_type) {
valid = true;
break;
}
base = base->get_base_script();
}
return valid;
} break;
}
return false;
}
operator PropertyInfo() const {
PropertyInfo info;
if (has_type) {
switch (kind) {
case BUILTIN: {
info.type = builtin_type;
} break;
case NATIVE: {
info.type = Variant::OBJECT;
info.class_name = native_type;
} break;
case SCRIPT:
case GDSCRIPT: {
info.type = Variant::OBJECT;
info.class_name = script_type->get_instance_base_type();
} break;
}
} else {
info.type = Variant::NIL;
info.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
}
return info;
}
GDScriptDataType() :
has_type(false) {}
};
@ -72,6 +145,12 @@ public:
OPCODE_ASSIGN,
OPCODE_ASSIGN_TRUE,
OPCODE_ASSIGN_FALSE,
OPCODE_ASSIGN_TYPED_BUILTIN,
OPCODE_ASSIGN_TYPED_NATIVE,
OPCODE_ASSIGN_TYPED_SCRIPT,
OPCODE_CAST_TO_BUILTIN,
OPCODE_CAST_TO_NATIVE,
OPCODE_CAST_TO_SCRIPT,
OPCODE_CONSTRUCT, //only for basic types!!
OPCODE_CONSTRUCT_ARRAY,
OPCODE_CONSTRUCT_DICTIONARY,