godot/modules/gdscript/gdscript_compiler.cpp

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/*************************************************************************/
/* gdscript_compiler.cpp */
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/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
/* 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"
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#include "gdscript.h"
#include "gdscript_byte_codegen.h"
#include "gdscript_cache.h"
#include "gdscript_utility_functions.h"
#include "core/config/engine.h"
#include "core/config/project_settings.h"
bool GDScriptCompiler::_is_class_member_property(CodeGen &codegen, const StringName &p_name) {
if (codegen.function_node && codegen.function_node->is_static) {
return false;
}
if (codegen.locals.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;
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GDScriptNativeClass *nc = nullptr;
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.is_empty()) {
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return;
}
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error = p_error;
if (p_node) {
err_line = p_node->start_line;
err_column = p_node->leftmost_column;
} else {
err_line = 0;
err_column = 0;
}
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}
GDScriptDataType GDScriptCompiler::_gdtype_from_datatype(const GDScriptParser::DataType &p_datatype, GDScript *p_owner) const {
if (!p_datatype.is_set() || !p_datatype.is_hard_type()) {
return GDScriptDataType();
}
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GDScriptDataType result;
result.has_type = true;
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switch (p_datatype.kind) {
case GDScriptParser::DataType::VARIANT: {
result.has_type = false;
} break;
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;
result.builtin_type = p_datatype.builtin_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::CLASS: {
// Locate class by constructing the path to it and following that path.
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GDScriptParser::ClassNode *class_type = p_datatype.class_type;
if (class_type) {
result.kind = GDScriptDataType::GDSCRIPT;
result.builtin_type = p_datatype.builtin_type;
String class_name = class_type->fqcn.split("::")[0];
const bool is_inner_by_path = (!main_script->path.is_empty()) && (class_name == main_script->path);
const bool is_inner_by_name = (!main_script->name.is_empty()) && (class_name == main_script->name);
if (is_inner_by_path || is_inner_by_name) {
// Local class.
List<StringName> names;
while (class_type->outer) {
names.push_back(class_type->identifier->name);
class_type = class_type->outer;
}
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.script_type = script.ptr();
result.native_type = script->get_instance_base_type();
} else {
// Inner class.
PackedStringArray classes = class_type->fqcn.split("::");
if (!classes.is_empty()) {
for (GDScript *script : parsed_classes) {
// Checking of inheritance structure of inner class to find a correct script link.
if (script->name == classes[classes.size() - 1]) {
PackedStringArray classes2 = script->fully_qualified_name.split("::");
bool valid = true;
if (classes.size() != classes2.size()) {
valid = false;
} else {
for (int i = 0; i < classes.size(); i++) {
if (classes[i] != classes2[i]) {
valid = false;
break;
}
}
}
if (!valid) {
continue;
}
result.script_type_ref = Ref<GDScript>(script);
break;
}
}
}
if (result.script_type_ref.is_null()) {
result.script_type_ref = GDScriptCache::get_shallow_script(p_datatype.script_path, main_script->path);
}
result.script_type = result.script_type_ref.ptr();
result.native_type = p_datatype.native_type;
}
}
} break;
case GDScriptParser::DataType::ENUM:
result.has_type = true;
result.kind = GDScriptDataType::BUILTIN;
if (p_datatype.is_meta_type) {
result.builtin_type = Variant::DICTIONARY;
} else {
result.builtin_type = Variant::INT;
}
break;
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case GDScriptParser::DataType::UNRESOLVED: {
ERR_PRINT("Parser bug: converting unresolved type.");
return GDScriptDataType();
}
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}
if (p_datatype.has_container_element_type()) {
result.set_container_element_type(_gdtype_from_datatype(p_datatype.get_container_element_type()));
}
// 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;
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}
static bool _is_exact_type(const PropertyInfo &p_par_type, const GDScriptDataType &p_arg_type) {
if (!p_arg_type.has_type) {
return false;
}
if (p_par_type.type == Variant::NIL) {
return false;
}
if (p_par_type.type == Variant::OBJECT) {
if (p_arg_type.kind == GDScriptDataType::BUILTIN) {
return false;
}
StringName class_name;
if (p_arg_type.kind == GDScriptDataType::NATIVE) {
class_name = p_arg_type.native_type;
} else {
class_name = p_arg_type.native_type == StringName() ? p_arg_type.script_type->get_instance_base_type() : p_arg_type.native_type;
}
return p_par_type.class_name == class_name || ClassDB::is_parent_class(class_name, p_par_type.class_name);
} else {
if (p_arg_type.kind != GDScriptDataType::BUILTIN) {
return false;
}
return p_par_type.type == p_arg_type.builtin_type;
}
}
static bool _have_exact_arguments(const MethodBind *p_method, const Vector<GDScriptCodeGenerator::Address> &p_arguments) {
if (p_method->get_argument_count() != p_arguments.size()) {
// ptrcall won't work with default arguments.
return false;
}
MethodInfo info;
ClassDB::get_method_info(p_method->get_instance_class(), p_method->get_name(), &info);
for (int i = 0; i < p_arguments.size(); i++) {
const PropertyInfo &prop = info.arguments[i];
if (!_is_exact_type(prop, p_arguments[i].type)) {
return false;
}
}
return true;
}
GDScriptCodeGenerator::Address GDScriptCompiler::_parse_expression(CodeGen &codegen, Error &r_error, const GDScriptParser::ExpressionNode *p_expression, bool p_root, bool p_initializer, const GDScriptCodeGenerator::Address &p_index_addr) {
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if (p_expression->is_constant) {
return codegen.add_constant(p_expression->reduced_value);
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}
GDScriptCodeGenerator *gen = codegen.generator;
switch (p_expression->type) {
case GDScriptParser::Node::IDENTIFIER: {
// Look for identifiers in current scope.
const GDScriptParser::IdentifierNode *in = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
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StringName identifier = in->name;
// Try function parameters.
if (codegen.parameters.has(identifier)) {
return codegen.parameters[identifier];
}
// Try local variables and constants.
if (!p_initializer && codegen.locals.has(identifier)) {
return codegen.locals[identifier];
}
// Try class members.
if (_is_class_member_property(codegen, identifier)) {
// Get property.
GDScriptCodeGenerator::Address temp = codegen.add_temporary(); // TODO: Could get the type of the class member here.
gen->write_get_member(temp, identifier);
return temp;
}
// Try members.
if (!codegen.function_node || !codegen.function_node->is_static) {
// Try member variables.
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if (codegen.script->member_indices.has(identifier)) {
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if (codegen.script->member_indices[identifier].getter != StringName() && codegen.script->member_indices[identifier].getter != codegen.function_name) {
// Perform getter.
GDScriptCodeGenerator::Address temp = codegen.add_temporary();
Vector<GDScriptCodeGenerator::Address> args; // No argument needed.
gen->write_call_self(temp, codegen.script->member_indices[identifier].getter, args);
return temp;
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} else {
// No getter or inside getter: direct member access.,
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int idx = codegen.script->member_indices[identifier].index;
return GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::MEMBER, idx, codegen.script->get_member_type(identifier));
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}
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}
}
// Try class constants.
{
GDScript *owner = codegen.script;
while (owner) {
GDScript *scr = owner;
GDScriptNativeClass *nc = nullptr;
while (scr) {
if (scr->constants.has(identifier)) {
return codegen.add_constant(scr->constants[identifier]); // TODO: Get type here.
}
if (scr->native.is_valid()) {
nc = scr->native.ptr();
}
scr = scr->_base;
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}
// Class C++ integer constant.
if (nc) {
bool success = false;
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int64_t constant = ClassDB::get_integer_constant(nc->get_name(), identifier, &success);
if (success) {
return codegen.add_constant(constant);
}
}
owner = owner->_owner;
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}
}
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// Try signals and methods (can be made callables).
{
// Search upwards through parent classes:
const GDScriptParser::ClassNode *base_class = codegen.class_node;
while (base_class != nullptr) {
if (base_class->has_member(identifier)) {
const GDScriptParser::ClassNode::Member &member = base_class->get_member(identifier);
if (member.type == GDScriptParser::ClassNode::Member::FUNCTION || member.type == GDScriptParser::ClassNode::Member::SIGNAL) {
// Get like it was a property.
GDScriptCodeGenerator::Address temp = codegen.add_temporary(); // TODO: Get type here.
GDScriptCodeGenerator::Address self(GDScriptCodeGenerator::Address::SELF);
gen->write_get_named(temp, identifier, self);
return temp;
}
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}
base_class = base_class->base_type.class_type;
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}
// Try in native base.
GDScript *scr = codegen.script;
GDScriptNativeClass *nc = nullptr;
while (scr) {
if (scr->native.is_valid()) {
nc = scr->native.ptr();
}
scr = scr->_base;
}
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if (nc && (ClassDB::has_signal(nc->get_name(), identifier) || ClassDB::has_method(nc->get_name(), identifier))) {
// Get like it was a property.
GDScriptCodeGenerator::Address temp = codegen.add_temporary(); // TODO: Get type here.
GDScriptCodeGenerator::Address self(GDScriptCodeGenerator::Address::SELF);
gen->write_get_named(temp, identifier, self);
return temp;
}
}
// Try globals.
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if (GDScriptLanguage::get_singleton()->get_global_map().has(identifier)) {
// If it's an autoload singleton, we postpone to load it at runtime.
// This is so one autoload doesn't try to load another before it's compiled.
HashMap<StringName, ProjectSettings::AutoloadInfo> autoloads = ProjectSettings::get_singleton()->get_autoload_list();
if (autoloads.has(identifier) && autoloads[identifier].is_singleton) {
GDScriptCodeGenerator::Address global = codegen.add_temporary(_gdtype_from_datatype(in->get_datatype()));
int idx = GDScriptLanguage::get_singleton()->get_global_map()[identifier];
gen->write_store_global(global, idx);
return global;
} else {
int idx = GDScriptLanguage::get_singleton()->get_global_map()[identifier];
Variant global = GDScriptLanguage::get_singleton()->get_global_array()[idx];
return codegen.add_constant(global);
}
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}
// Try global classes.
if (ScriptServer::is_global_class(identifier)) {
const GDScriptParser::ClassNode *class_node = codegen.class_node;
while (class_node->outer) {
class_node = class_node->outer;
}
Ref<Resource> res;
if (class_node->identifier && class_node->identifier->name == identifier) {
res = Ref<GDScript>(main_script);
} else {
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);
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
}
}
return codegen.add_constant(res);
}
#ifdef TOOLS_ENABLED
if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
GDScriptCodeGenerator::Address global = codegen.add_temporary(); // TODO: Get type.
gen->write_store_named_global(global, identifier);
return global;
}
#endif
// Not found, error.
_set_error("Identifier not found: " + String(identifier), p_expression);
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
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} break;
case GDScriptParser::Node::LITERAL: {
// Return constant.
const GDScriptParser::LiteralNode *cn = static_cast<const GDScriptParser::LiteralNode *>(p_expression);
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return codegen.add_constant(cn->value);
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} break;
case GDScriptParser::Node::SELF: {
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//return constant
if (codegen.function_node && codegen.function_node->is_static) {
_set_error("'self' not present in static function!", p_expression);
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
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}
return GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF);
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} break;
case GDScriptParser::Node::ARRAY: {
const GDScriptParser::ArrayNode *an = static_cast<const GDScriptParser::ArrayNode *>(p_expression);
Vector<GDScriptCodeGenerator::Address> values;
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// Create the result temporary first since it's the last to be killed.
GDScriptDataType array_type = _gdtype_from_datatype(an->get_datatype());
GDScriptCodeGenerator::Address result = codegen.add_temporary(array_type);
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for (int i = 0; i < an->elements.size(); i++) {
GDScriptCodeGenerator::Address val = _parse_expression(codegen, r_error, an->elements[i]);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
values.push_back(val);
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}
if (array_type.has_container_element_type()) {
gen->write_construct_typed_array(result, array_type.get_container_element_type(), values);
} else {
gen->write_construct_array(result, values);
}
for (int i = 0; i < values.size(); i++) {
if (values[i].mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
}
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return result;
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} break;
case GDScriptParser::Node::DICTIONARY: {
const GDScriptParser::DictionaryNode *dn = static_cast<const GDScriptParser::DictionaryNode *>(p_expression);
Vector<GDScriptCodeGenerator::Address> elements;
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// Create the result temporary first since it's the last to be killed.
GDScriptDataType dict_type;
dict_type.has_type = true;
dict_type.kind = GDScriptDataType::BUILTIN;
dict_type.builtin_type = Variant::DICTIONARY;
GDScriptCodeGenerator::Address result = codegen.add_temporary(dict_type);
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for (int i = 0; i < dn->elements.size(); i++) {
// Key.
GDScriptCodeGenerator::Address element;
switch (dn->style) {
case GDScriptParser::DictionaryNode::PYTHON_DICT:
// Python-style: key is any expression.
element = _parse_expression(codegen, r_error, dn->elements[i].key);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
break;
case GDScriptParser::DictionaryNode::LUA_TABLE:
// Lua-style: key is an identifier interpreted as StringName.
StringName key = dn->elements[i].key->reduced_value.operator StringName();
element = codegen.add_constant(key);
break;
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}
elements.push_back(element);
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element = _parse_expression(codegen, r_error, dn->elements[i].value);
if (r_error) {
return GDScriptCodeGenerator::Address();
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}
elements.push_back(element);
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}
gen->write_construct_dictionary(result, elements);
for (int i = 0; i < elements.size(); i++) {
if (elements[i].mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
}
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return result;
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} break;
case GDScriptParser::Node::CAST: {
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const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
GDScriptParser::DataType og_cast_type = cn->cast_type->get_datatype();
GDScriptDataType cast_type = _gdtype_from_datatype(og_cast_type);
if (og_cast_type.kind == GDScriptParser::DataType::ENUM) {
// Enum types are usually treated as dictionaries, but in this case we want to cast to an integer.
cast_type.kind = GDScriptDataType::BUILTIN;
cast_type.builtin_type = Variant::INT;
}
// Create temporary for result first since it will be deleted last.
GDScriptCodeGenerator::Address result = codegen.add_temporary(cast_type);
GDScriptCodeGenerator::Address source = _parse_expression(codegen, r_error, cn->operand);
gen->write_cast(result, source, cast_type);
if (source.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
return result;
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} break;
case GDScriptParser::Node::CALL: {
const GDScriptParser::CallNode *call = static_cast<const GDScriptParser::CallNode *>(p_expression);
GDScriptDataType type = _gdtype_from_datatype(call->get_datatype());
GDScriptCodeGenerator::Address result = codegen.add_temporary(type);
GDScriptCodeGenerator::Address nil = GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::NIL);
GDScriptCodeGenerator::Address return_addr = p_root ? nil : result;
Vector<GDScriptCodeGenerator::Address> arguments;
for (int i = 0; i < call->arguments.size(); i++) {
GDScriptCodeGenerator::Address arg = _parse_expression(codegen, r_error, call->arguments[i]);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
arguments.push_back(arg);
}
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if (!call->is_super && call->callee->type == GDScriptParser::Node::IDENTIFIER && GDScriptParser::get_builtin_type(call->function_name) != Variant::VARIANT_MAX) {
// Construct a built-in type.
Variant::Type vtype = GDScriptParser::get_builtin_type(static_cast<GDScriptParser::IdentifierNode *>(call->callee)->name);
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gen->write_construct(result, vtype, arguments);
} else if (!call->is_super && call->callee->type == GDScriptParser::Node::IDENTIFIER && Variant::has_utility_function(call->function_name)) {
// Variant utility function.
gen->write_call_utility(result, call->function_name, arguments);
} else if (!call->is_super && call->callee->type == GDScriptParser::Node::IDENTIFIER && GDScriptUtilityFunctions::function_exists(call->function_name)) {
// GDScript utility function.
gen->write_call_gdscript_utility(result, GDScriptUtilityFunctions::get_function(call->function_name), arguments);
} else {
// Regular function.
const GDScriptParser::ExpressionNode *callee = call->callee;
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if (call->is_super) {
// Super call.
gen->write_super_call(result, call->function_name, arguments);
} else {
if (callee->type == GDScriptParser::Node::IDENTIFIER) {
// Self function call.
if (ClassDB::has_method(codegen.script->native->get_name(), call->function_name)) {
// Native method, use faster path.
GDScriptCodeGenerator::Address self;
self.mode = GDScriptCodeGenerator::Address::SELF;
MethodBind *method = ClassDB::get_method(codegen.script->native->get_name(), call->function_name);
if (_have_exact_arguments(method, arguments)) {
// Exact arguments, use ptrcall.
gen->write_call_ptrcall(result, self, method, arguments);
} else {
// Not exact arguments, but still can use method bind call.
gen->write_call_method_bind(result, self, method, arguments);
}
} else if ((codegen.function_node && codegen.function_node->is_static) || call->function_name == "new") {
GDScriptCodeGenerator::Address self;
self.mode = GDScriptCodeGenerator::Address::CLASS;
if (within_await) {
gen->write_call_async(result, self, call->function_name, arguments);
} else {
gen->write_call(return_addr, self, call->function_name, arguments);
}
} else {
if (within_await) {
gen->write_call_self_async(result, call->function_name, arguments);
} else {
gen->write_call_self(return_addr, call->function_name, arguments);
}
}
} else if (callee->type == GDScriptParser::Node::SUBSCRIPT) {
const GDScriptParser::SubscriptNode *subscript = static_cast<const GDScriptParser::SubscriptNode *>(call->callee);
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if (subscript->is_attribute) {
// May be static built-in method call.
if (!call->is_super && subscript->base->type == GDScriptParser::Node::IDENTIFIER && GDScriptParser::get_builtin_type(static_cast<GDScriptParser::IdentifierNode *>(subscript->base)->name) < Variant::VARIANT_MAX) {
gen->write_call_builtin_type_static(result, GDScriptParser::get_builtin_type(static_cast<GDScriptParser::IdentifierNode *>(subscript->base)->name), subscript->attribute->name, arguments);
} else if (!call->is_super && subscript->base->type == GDScriptParser::Node::IDENTIFIER && call->function_name != SNAME("new") &&
ClassDB::class_exists(static_cast<GDScriptParser::IdentifierNode *>(subscript->base)->name) && !Engine::get_singleton()->has_singleton(static_cast<GDScriptParser::IdentifierNode *>(subscript->base)->name)) {
// It's a static native method call.
gen->write_call_native_static(result, static_cast<GDScriptParser::IdentifierNode *>(subscript->base)->name, subscript->attribute->name, arguments);
} else {
GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, subscript->base);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
if (within_await) {
gen->write_call_async(result, base, call->function_name, arguments);
} else if (base.type.has_type && base.type.kind != GDScriptDataType::BUILTIN) {
// Native method, use faster path.
StringName class_name;
if (base.type.kind == GDScriptDataType::NATIVE) {
class_name = base.type.native_type;
} else {
class_name = base.type.native_type == StringName() ? base.type.script_type->get_instance_base_type() : base.type.native_type;
}
if (ClassDB::class_exists(class_name) && ClassDB::has_method(class_name, call->function_name)) {
MethodBind *method = ClassDB::get_method(class_name, call->function_name);
if (_have_exact_arguments(method, arguments)) {
// Exact arguments, use ptrcall.
gen->write_call_ptrcall(result, base, method, arguments);
} else {
// Not exact arguments, but still can use method bind call.
gen->write_call_method_bind(result, base, method, arguments);
}
} else {
gen->write_call(return_addr, base, call->function_name, arguments);
}
} else if (base.type.has_type && base.type.kind == GDScriptDataType::BUILTIN) {
gen->write_call_builtin_type(result, base, base.type.builtin_type, call->function_name, arguments);
} else {
gen->write_call(return_addr, base, call->function_name, arguments);
}
if (base.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
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}
} else {
_set_error("Cannot call something that isn't a function.", call->callee);
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
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}
} else {
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
}
}
}
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for (int i = 0; i < arguments.size(); i++) {
if (arguments[i].mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
}
return result;
} break;
case GDScriptParser::Node::GET_NODE: {
const GDScriptParser::GetNodeNode *get_node = static_cast<const GDScriptParser::GetNodeNode *>(p_expression);
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Vector<GDScriptCodeGenerator::Address> args;
args.push_back(codegen.add_constant(NodePath(get_node->full_path)));
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(get_node->get_datatype()));
MethodBind *get_node_method = ClassDB::get_method("Node", "get_node");
gen->write_call_ptrcall(result, GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF), get_node_method, args);
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return result;
} break;
case GDScriptParser::Node::PRELOAD: {
const GDScriptParser::PreloadNode *preload = static_cast<const GDScriptParser::PreloadNode *>(p_expression);
// Add resource as constant.
return codegen.add_constant(preload->resource);
} break;
case GDScriptParser::Node::AWAIT: {
const GDScriptParser::AwaitNode *await = static_cast<const GDScriptParser::AwaitNode *>(p_expression);
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(p_expression->get_datatype()));
within_await = true;
GDScriptCodeGenerator::Address argument = _parse_expression(codegen, r_error, await->to_await);
within_await = false;
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_await(result, argument);
if (argument.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
return result;
} break;
// Indexing operator.
case GDScriptParser::Node::SUBSCRIPT: {
const GDScriptParser::SubscriptNode *subscript = static_cast<const GDScriptParser::SubscriptNode *>(p_expression);
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(subscript->get_datatype()));
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GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, subscript->base);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
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bool named = subscript->is_attribute;
StringName name;
GDScriptCodeGenerator::Address index;
if (p_index_addr.mode != GDScriptCodeGenerator::Address::NIL) {
index = p_index_addr;
} else if (subscript->is_attribute) {
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if (subscript->base->type == GDScriptParser::Node::SELF && codegen.script) {
GDScriptParser::IdentifierNode *identifier = subscript->attribute;
HashMap<StringName, GDScript::MemberInfo>::Iterator MI = codegen.script->member_indices.find(identifier->name);
#ifdef DEBUG_ENABLED
if (MI && MI->value.getter == codegen.function_name) {
String n = identifier->name;
_set_error("Must use '" + n + "' instead of 'self." + n + "' in getter.", identifier);
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
}
#endif
if (MI && MI->value.getter == "") {
// Remove result temp as we don't need it.
gen->pop_temporary();
// Faster than indexing self (as if no self. had been used).
return GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::MEMBER, MI->value.index, _gdtype_from_datatype(subscript->get_datatype()));
}
}
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name = subscript->attribute->name;
named = true;
} else {
if (subscript->index->is_constant && subscript->index->reduced_value.get_type() == Variant::STRING_NAME) {
// Also, somehow, named (speed up anyway).
name = subscript->index->reduced_value;
named = true;
} else {
// Regular indexing.
index = _parse_expression(codegen, r_error, subscript->index);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
}
}
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if (named) {
gen->write_get_named(result, name, base);
} else {
gen->write_get(result, index, base);
}
if (index.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
if (base.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
return result;
} break;
case GDScriptParser::Node::UNARY_OPERATOR: {
const GDScriptParser::UnaryOpNode *unary = static_cast<const GDScriptParser::UnaryOpNode *>(p_expression);
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(unary->get_datatype()));
GDScriptCodeGenerator::Address operand = _parse_expression(codegen, r_error, unary->operand);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_unary_operator(result, unary->variant_op, operand);
if (operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
return result;
}
case GDScriptParser::Node::BINARY_OPERATOR: {
const GDScriptParser::BinaryOpNode *binary = static_cast<const GDScriptParser::BinaryOpNode *>(p_expression);
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(binary->get_datatype()));
switch (binary->operation) {
case GDScriptParser::BinaryOpNode::OP_LOGIC_AND: {
// AND operator with early out on failure.
GDScriptCodeGenerator::Address left_operand = _parse_expression(codegen, r_error, binary->left_operand);
gen->write_and_left_operand(left_operand);
GDScriptCodeGenerator::Address right_operand = _parse_expression(codegen, r_error, binary->right_operand);
gen->write_and_right_operand(right_operand);
gen->write_end_and(result);
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if (right_operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
if (left_operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
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} break;
case GDScriptParser::BinaryOpNode::OP_LOGIC_OR: {
// OR operator with early out on success.
GDScriptCodeGenerator::Address left_operand = _parse_expression(codegen, r_error, binary->left_operand);
gen->write_or_left_operand(left_operand);
GDScriptCodeGenerator::Address right_operand = _parse_expression(codegen, r_error, binary->right_operand);
gen->write_or_right_operand(right_operand);
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gen->write_end_or(result);
if (right_operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
if (left_operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
} break;
case GDScriptParser::BinaryOpNode::OP_TYPE_TEST: {
GDScriptCodeGenerator::Address operand = _parse_expression(codegen, r_error, binary->left_operand);
if (binary->right_operand->type == GDScriptParser::Node::IDENTIFIER && GDScriptParser::get_builtin_type(static_cast<const GDScriptParser::IdentifierNode *>(binary->right_operand)->name) != Variant::VARIANT_MAX) {
// `is` with builtin type)
Variant::Type type = GDScriptParser::get_builtin_type(static_cast<const GDScriptParser::IdentifierNode *>(binary->right_operand)->name);
gen->write_type_test_builtin(result, operand, type);
} else {
GDScriptCodeGenerator::Address type = _parse_expression(codegen, r_error, binary->right_operand);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_type_test(result, operand, type);
if (type.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
}
if (operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
} break;
default: {
GDScriptCodeGenerator::Address left_operand = _parse_expression(codegen, r_error, binary->left_operand);
GDScriptCodeGenerator::Address right_operand = _parse_expression(codegen, r_error, binary->right_operand);
gen->write_binary_operator(result, binary->variant_op, left_operand, right_operand);
if (right_operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
if (left_operand.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
}
}
return result;
} break;
case GDScriptParser::Node::TERNARY_OPERATOR: {
// x IF a ELSE y operator with early out on failure.
const GDScriptParser::TernaryOpNode *ternary = static_cast<const GDScriptParser::TernaryOpNode *>(p_expression);
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(ternary->get_datatype()));
gen->write_start_ternary(result);
GDScriptCodeGenerator::Address condition = _parse_expression(codegen, r_error, ternary->condition);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_ternary_condition(condition);
if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
GDScriptCodeGenerator::Address true_expr = _parse_expression(codegen, r_error, ternary->true_expr);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_ternary_true_expr(true_expr);
if (true_expr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
GDScriptCodeGenerator::Address false_expr = _parse_expression(codegen, r_error, ternary->false_expr);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_ternary_false_expr(false_expr);
if (false_expr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
gen->write_end_ternary();
return result;
} break;
case GDScriptParser::Node::ASSIGNMENT: {
const GDScriptParser::AssignmentNode *assignment = static_cast<const GDScriptParser::AssignmentNode *>(p_expression);
if (assignment->assignee->type == GDScriptParser::Node::SUBSCRIPT) {
// SET (chained) MODE!
const GDScriptParser::SubscriptNode *subscript = static_cast<GDScriptParser::SubscriptNode *>(assignment->assignee);
#ifdef DEBUG_ENABLED
if (subscript->is_attribute && subscript->base->type == GDScriptParser::Node::SELF && codegen.script) {
HashMap<StringName, GDScript::MemberInfo>::Iterator MI = codegen.script->member_indices.find(subscript->attribute->name);
if (MI && MI->value.setter == codegen.function_name) {
String n = subscript->attribute->name;
_set_error("Must use '" + n + "' instead of 'self." + n + "' in setter.", subscript);
r_error = ERR_COMPILATION_FAILED;
return GDScriptCodeGenerator::Address();
}
}
#endif
/* Find chain of sets */
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StringName assign_class_member_property;
GDScriptCodeGenerator::Address target_member_property;
bool is_member_property = false;
bool member_property_has_setter = false;
bool member_property_is_in_setter = false;
StringName member_property_setter_function;
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List<const GDScriptParser::SubscriptNode *> chain;
{
// Create get/set chain.
const GDScriptParser::SubscriptNode *n = subscript;
while (true) {
chain.push_back(n);
if (n->base->type != GDScriptParser::Node::SUBSCRIPT) {
// Check for a property.
if (n->base->type == GDScriptParser::Node::IDENTIFIER) {
GDScriptParser::IdentifierNode *identifier = static_cast<GDScriptParser::IdentifierNode *>(n->base);
StringName var_name = identifier->name;
if (_is_class_member_property(codegen, var_name)) {
assign_class_member_property = var_name;
} else if (!codegen.locals.has(var_name) && codegen.script->member_indices.has(var_name)) {
is_member_property = true;
member_property_setter_function = codegen.script->member_indices[var_name].setter;
member_property_has_setter = member_property_setter_function != StringName();
member_property_is_in_setter = member_property_has_setter && member_property_setter_function == codegen.function_name;
target_member_property.mode = GDScriptCodeGenerator::Address::MEMBER;
target_member_property.address = codegen.script->member_indices[var_name].index;
target_member_property.type = codegen.script->member_indices[var_name].data_type;
}
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}
break;
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}
n = static_cast<const GDScriptParser::SubscriptNode *>(n->base);
}
}
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/* Chain of gets */
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// Get at (potential) root stack pos, so it can be returned.
GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, chain.back()->get()->base);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
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GDScriptCodeGenerator::Address prev_base = base;
struct ChainInfo {
bool is_named = false;
GDScriptCodeGenerator::Address base;
GDScriptCodeGenerator::Address key;
StringName name;
};
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List<ChainInfo> set_chain;
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for (List<const GDScriptParser::SubscriptNode *>::Element *E = chain.back(); E; E = E->prev()) {
if (E == chain.front()) {
// Skip the main subscript, since we'll assign to that.
break;
}
const GDScriptParser::SubscriptNode *subscript_elem = E->get();
GDScriptCodeGenerator::Address value = codegen.add_temporary(_gdtype_from_datatype(subscript_elem->get_datatype()));
GDScriptCodeGenerator::Address key;
StringName name;
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if (subscript_elem->is_attribute) {
name = subscript_elem->attribute->name;
gen->write_get_named(value, name, prev_base);
} else {
key = _parse_expression(codegen, r_error, subscript_elem->index);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
gen->write_get(value, key, prev_base);
}
// Store base and key for setting it back later.
set_chain.push_front({ subscript_elem->is_attribute, prev_base, key, name }); // Push to front to invert the list.
prev_base = value;
}
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// Get value to assign.
GDScriptCodeGenerator::Address assigned = _parse_expression(codegen, r_error, assignment->assigned_value);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
// Get the key if needed.
GDScriptCodeGenerator::Address key;
StringName name;
if (subscript->is_attribute) {
name = subscript->attribute->name;
} else {
key = _parse_expression(codegen, r_error, subscript->index);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
}
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// Perform operator if any.
if (assignment->operation != GDScriptParser::AssignmentNode::OP_NONE) {
GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype()));
GDScriptCodeGenerator::Address value = codegen.add_temporary(_gdtype_from_datatype(subscript->get_datatype()));
if (subscript->is_attribute) {
gen->write_get_named(value, name, prev_base);
} else {
gen->write_get(value, key, prev_base);
}
gen->write_binary_operator(op_result, assignment->variant_op, value, assigned);
gen->pop_temporary();
if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
assigned = op_result;
}
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// Perform assignment.
if (subscript->is_attribute) {
gen->write_set_named(prev_base, name, assigned);
} else {
gen->write_set(prev_base, key, assigned);
}
if (key.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
assigned = prev_base;
// Set back the values into their bases.
for (const ChainInfo &info : set_chain) {
bool known_type = assigned.type.has_type;
bool is_shared = Variant::is_type_shared(assigned.type.builtin_type);
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if (!known_type || !is_shared) {
if (!known_type) {
// Jump shared values since they are already updated in-place.
gen->write_jump_if_shared(assigned);
}
if (!info.is_named) {
gen->write_set(info.base, info.key, assigned);
} else {
gen->write_set_named(info.base, info.name, assigned);
}
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if (!known_type) {
gen->write_end_jump_if_shared();
}
}
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if (!info.is_named && info.key.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
assigned = info.base;
}
bool known_type = assigned.type.has_type;
bool is_shared = Variant::is_type_shared(assigned.type.builtin_type);
if (!known_type || !is_shared) {
// If this is a class member property, also assign to it.
// This allow things like: position.x += 2.0
if (assign_class_member_property != StringName()) {
if (!known_type) {
gen->write_jump_if_shared(assigned);
}
gen->write_set_member(assigned, assign_class_member_property);
if (!known_type) {
gen->write_end_jump_if_shared();
}
} else if (is_member_property) {
// Same as above but for script members.
if (!known_type) {
gen->write_jump_if_shared(assigned);
}
if (member_property_has_setter && !member_property_is_in_setter) {
Vector<GDScriptCodeGenerator::Address> args;
args.push_back(assigned);
gen->write_call(GDScriptCodeGenerator::Address(), GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF), member_property_setter_function, args);
} else {
gen->write_assign(target_member_property, assigned);
}
if (!known_type) {
gen->write_end_jump_if_shared();
}
}
}
if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
} else if (assignment->assignee->type == GDScriptParser::Node::IDENTIFIER && _is_class_member_property(codegen, static_cast<GDScriptParser::IdentifierNode *>(assignment->assignee)->name)) {
// Assignment to member property.
GDScriptCodeGenerator::Address assigned_value = _parse_expression(codegen, r_error, assignment->assigned_value);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
GDScriptCodeGenerator::Address to_assign = assigned_value;
bool has_operation = assignment->operation != GDScriptParser::AssignmentNode::OP_NONE;
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StringName name = static_cast<GDScriptParser::IdentifierNode *>(assignment->assignee)->name;
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if (has_operation) {
GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype()));
GDScriptCodeGenerator::Address member = codegen.add_temporary(_gdtype_from_datatype(assignment->assignee->get_datatype()));
gen->write_get_member(member, name);
gen->write_binary_operator(op_result, assignment->variant_op, member, assigned_value);
gen->pop_temporary(); // Pop member temp.
to_assign = op_result;
}
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gen->write_set_member(to_assign, name);
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if (to_assign.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary(); // Pop the assigned expression or the temp result if it has operation.
}
if (has_operation && assigned_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary(); // Pop the assigned expression if not done before.
}
} else {
// Regular assignment.
ERR_FAIL_COND_V_MSG(assignment->assignee->type != GDScriptParser::Node::IDENTIFIER, GDScriptCodeGenerator::Address(), "Expected the assignee to be an identifier here.");
GDScriptCodeGenerator::Address member;
bool is_member = false;
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bool has_setter = false;
bool is_in_setter = false;
StringName setter_function;
StringName var_name = static_cast<const GDScriptParser::IdentifierNode *>(assignment->assignee)->name;
if (!codegen.locals.has(var_name) && codegen.script->member_indices.has(var_name)) {
is_member = true;
setter_function = codegen.script->member_indices[var_name].setter;
has_setter = setter_function != StringName();
is_in_setter = has_setter && setter_function == codegen.function_name;
member.mode = GDScriptCodeGenerator::Address::MEMBER;
member.address = codegen.script->member_indices[var_name].index;
member.type = codegen.script->member_indices[var_name].data_type;
}
GDScriptCodeGenerator::Address target;
if (is_member) {
target = member; // _parse_expression could call its getter, but we want to know the actual address
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} else {
target = _parse_expression(codegen, r_error, assignment->assignee);
if (r_error) {
return GDScriptCodeGenerator::Address();
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}
}
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GDScriptCodeGenerator::Address assigned_value = _parse_expression(codegen, r_error, assignment->assigned_value);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
GDScriptCodeGenerator::Address to_assign;
bool has_operation = assignment->operation != GDScriptParser::AssignmentNode::OP_NONE;
if (has_operation) {
// Perform operation.
GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype()));
GDScriptCodeGenerator::Address og_value = _parse_expression(codegen, r_error, assignment->assignee);
gen->write_binary_operator(op_result, assignment->variant_op, og_value, assigned_value);
to_assign = op_result;
if (og_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
} else {
to_assign = assigned_value;
}
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GDScriptDataType assign_type = _gdtype_from_datatype(assignment->assignee->get_datatype());
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if (has_setter && !is_in_setter) {
// Call setter.
Vector<GDScriptCodeGenerator::Address> args;
args.push_back(to_assign);
gen->write_call(GDScriptCodeGenerator::Address(), GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF), setter_function, args);
} else {
// Just assign.
if (assignment->use_conversion_assign) {
gen->write_assign_with_conversion(target, to_assign);
} else {
gen->write_assign(target, to_assign);
}
}
if (to_assign.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary(); // Pop assigned value or temp operation result.
}
if (has_operation && assigned_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary(); // Pop assigned value if not done before.
}
if (target.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary(); // Pop the target to assignment.
}
}
return GDScriptCodeGenerator::Address(); // Assignment does not return a value.
} break;
case GDScriptParser::Node::LAMBDA: {
const GDScriptParser::LambdaNode *lambda = static_cast<const GDScriptParser::LambdaNode *>(p_expression);
GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(lambda->get_datatype()));
Vector<GDScriptCodeGenerator::Address> captures;
captures.resize(lambda->captures.size());
for (int i = 0; i < lambda->captures.size(); i++) {
captures.write[i] = _parse_expression(codegen, r_error, lambda->captures[i]);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
}
GDScriptFunction *function = _parse_function(r_error, codegen.script, codegen.class_node, lambda->function, false, true);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
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gen->write_lambda(result, function, captures, lambda->use_self);
for (int i = 0; i < captures.size(); i++) {
if (captures[i].mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary();
}
}
return result;
} break;
default: {
ERR_FAIL_V_MSG(GDScriptCodeGenerator::Address(), "Bug in bytecode compiler, unexpected node in parse tree while parsing expression."); // Unreachable code.
} break;
}
}
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GDScriptCodeGenerator::Address GDScriptCompiler::_parse_match_pattern(CodeGen &codegen, Error &r_error, const GDScriptParser::PatternNode *p_pattern, const GDScriptCodeGenerator::Address &p_value_addr, const GDScriptCodeGenerator::Address &p_type_addr, const GDScriptCodeGenerator::Address &p_previous_test, bool p_is_first, bool p_is_nested) {
switch (p_pattern->pattern_type) {
case GDScriptParser::PatternNode::PT_LITERAL: {
if (p_is_nested) {
codegen.generator->write_and_left_operand(p_previous_test);
} else if (!p_is_first) {
codegen.generator->write_or_left_operand(p_previous_test);
}
// Get literal type into constant map.
GDScriptCodeGenerator::Address literal_type_addr = codegen.add_constant((int)p_pattern->literal->value.get_type());
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// Equality is always a boolean.
GDScriptDataType equality_type;
equality_type.has_type = true;
equality_type.kind = GDScriptDataType::BUILTIN;
equality_type.builtin_type = Variant::BOOL;
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// Check type equality.
GDScriptCodeGenerator::Address type_equality_addr = codegen.add_temporary(equality_type);
codegen.generator->write_binary_operator(type_equality_addr, Variant::OP_EQUAL, p_type_addr, literal_type_addr);
codegen.generator->write_and_left_operand(type_equality_addr);
// Get literal.
GDScriptCodeGenerator::Address literal_addr = _parse_expression(codegen, r_error, p_pattern->literal);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
// Check value equality.
GDScriptCodeGenerator::Address equality_addr = codegen.add_temporary(equality_type);
codegen.generator->write_binary_operator(equality_addr, Variant::OP_EQUAL, p_value_addr, literal_addr);
codegen.generator->write_and_right_operand(equality_addr);
// AND both together (reuse temporary location).
codegen.generator->write_end_and(type_equality_addr);
codegen.generator->pop_temporary(); // Remove equality_addr from stack.
if (literal_addr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
// If this isn't the first, we need to OR with the previous pattern. If it's nested, we use AND instead.
if (p_is_nested) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_and_right_operand(type_equality_addr);
codegen.generator->write_end_and(p_previous_test);
} else if (!p_is_first) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_or_right_operand(type_equality_addr);
codegen.generator->write_end_or(p_previous_test);
} else {
// Just assign this value to the accumulator temporary.
codegen.generator->write_assign(p_previous_test, type_equality_addr);
}
codegen.generator->pop_temporary(); // Remove type_equality_addr.
return p_previous_test;
} break;
case GDScriptParser::PatternNode::PT_EXPRESSION: {
if (p_is_nested) {
codegen.generator->write_and_left_operand(p_previous_test);
} else if (!p_is_first) {
codegen.generator->write_or_left_operand(p_previous_test);
}
// Create the result temps first since it's the last to go away.
GDScriptCodeGenerator::Address result_addr = codegen.add_temporary();
GDScriptCodeGenerator::Address equality_test_addr = codegen.add_temporary();
// Evaluate expression.
GDScriptCodeGenerator::Address expr_addr;
expr_addr = _parse_expression(codegen, r_error, p_pattern->expression);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
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// Evaluate expression type.
Vector<GDScriptCodeGenerator::Address> typeof_args;
typeof_args.push_back(expr_addr);
codegen.generator->write_call_utility(result_addr, "typeof", typeof_args);
// Check type equality.
codegen.generator->write_binary_operator(result_addr, Variant::OP_EQUAL, p_type_addr, result_addr);
codegen.generator->write_and_left_operand(result_addr);
// Check value equality.
codegen.generator->write_binary_operator(equality_test_addr, Variant::OP_EQUAL, p_value_addr, expr_addr);
codegen.generator->write_and_right_operand(equality_test_addr);
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// AND both type and value equality.
codegen.generator->write_end_and(result_addr);
// We don't need the expression temporary anymore.
if (expr_addr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
codegen.generator->pop_temporary(); // Remove type equality temporary.
// If this isn't the first, we need to OR with the previous pattern. If it's nested, we use AND instead.
if (p_is_nested) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_and_right_operand(result_addr);
codegen.generator->write_end_and(p_previous_test);
} else if (!p_is_first) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_or_right_operand(result_addr);
codegen.generator->write_end_or(p_previous_test);
} else {
// Just assign this value to the accumulator temporary.
codegen.generator->write_assign(p_previous_test, result_addr);
}
codegen.generator->pop_temporary(); // Remove temp result addr.
return p_previous_test;
} break;
case GDScriptParser::PatternNode::PT_ARRAY: {
if (p_is_nested) {
codegen.generator->write_and_left_operand(p_previous_test);
} else if (!p_is_first) {
codegen.generator->write_or_left_operand(p_previous_test);
}
// Get array type into constant map.
GDScriptCodeGenerator::Address array_type_addr = codegen.add_constant((int)Variant::ARRAY);
// Equality is always a boolean.
GDScriptDataType temp_type;
temp_type.has_type = true;
temp_type.kind = GDScriptDataType::BUILTIN;
temp_type.builtin_type = Variant::BOOL;
// Check type equality.
GDScriptCodeGenerator::Address result_addr = codegen.add_temporary(temp_type);
codegen.generator->write_binary_operator(result_addr, Variant::OP_EQUAL, p_type_addr, array_type_addr);
codegen.generator->write_and_left_operand(result_addr);
// Store pattern length in constant map.
GDScriptCodeGenerator::Address array_length_addr = codegen.add_constant(p_pattern->rest_used ? p_pattern->array.size() - 1 : p_pattern->array.size());
// Get value length.
temp_type.builtin_type = Variant::INT;
GDScriptCodeGenerator::Address value_length_addr = codegen.add_temporary(temp_type);
Vector<GDScriptCodeGenerator::Address> len_args;
len_args.push_back(p_value_addr);
codegen.generator->write_call_gdscript_utility(value_length_addr, GDScriptUtilityFunctions::get_function("len"), len_args);
// Test length compatibility.
temp_type.builtin_type = Variant::BOOL;
GDScriptCodeGenerator::Address length_compat_addr = codegen.add_temporary(temp_type);
codegen.generator->write_binary_operator(length_compat_addr, p_pattern->rest_used ? Variant::OP_GREATER_EQUAL : Variant::OP_EQUAL, value_length_addr, array_length_addr);
codegen.generator->write_and_right_operand(length_compat_addr);
// AND type and length check.
codegen.generator->write_end_and(result_addr);
// Remove length temporaries.
codegen.generator->pop_temporary();
codegen.generator->pop_temporary();
// Create temporaries outside the loop so they can be reused.
GDScriptCodeGenerator::Address element_addr = codegen.add_temporary();
GDScriptCodeGenerator::Address element_type_addr = codegen.add_temporary();
// Evaluate element by element.
for (int i = 0; i < p_pattern->array.size(); i++) {
if (p_pattern->array[i]->pattern_type == GDScriptParser::PatternNode::PT_REST) {
// Don't want to access an extra element of the user array.
break;
}
// Use AND here too, as we don't want to be checking elements if previous test failed (which means this might be an invalid get).
codegen.generator->write_and_left_operand(result_addr);
// Add index to constant map.
GDScriptCodeGenerator::Address index_addr = codegen.add_constant(i);
// Get the actual element from the user-sent array.
codegen.generator->write_get(element_addr, index_addr, p_value_addr);
// Also get type of element.
Vector<GDScriptCodeGenerator::Address> typeof_args;
typeof_args.push_back(element_addr);
codegen.generator->write_call_utility(element_type_addr, "typeof", typeof_args);
// Try the pattern inside the element.
result_addr = _parse_match_pattern(codegen, r_error, p_pattern->array[i], element_addr, element_type_addr, result_addr, false, true);
if (r_error != OK) {
return GDScriptCodeGenerator::Address();
}
codegen.generator->write_and_right_operand(result_addr);
codegen.generator->write_end_and(result_addr);
}
// Remove element temporaries.
codegen.generator->pop_temporary();
codegen.generator->pop_temporary();
// If this isn't the first, we need to OR with the previous pattern. If it's nested, we use AND instead.
if (p_is_nested) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_and_right_operand(result_addr);
codegen.generator->write_end_and(p_previous_test);
} else if (!p_is_first) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_or_right_operand(result_addr);
codegen.generator->write_end_or(p_previous_test);
} else {
// Just assign this value to the accumulator temporary.
codegen.generator->write_assign(p_previous_test, result_addr);
}
codegen.generator->pop_temporary(); // Remove temp result addr.
return p_previous_test;
} break;
case GDScriptParser::PatternNode::PT_DICTIONARY: {
if (p_is_nested) {
codegen.generator->write_and_left_operand(p_previous_test);
} else if (!p_is_first) {
codegen.generator->write_or_left_operand(p_previous_test);
}
// Get dictionary type into constant map.
GDScriptCodeGenerator::Address dict_type_addr = codegen.add_constant((int)Variant::DICTIONARY);
// Equality is always a boolean.
GDScriptDataType temp_type;
temp_type.has_type = true;
temp_type.kind = GDScriptDataType::BUILTIN;
temp_type.builtin_type = Variant::BOOL;
// Check type equality.
GDScriptCodeGenerator::Address result_addr = codegen.add_temporary(temp_type);
codegen.generator->write_binary_operator(result_addr, Variant::OP_EQUAL, p_type_addr, dict_type_addr);
codegen.generator->write_and_left_operand(result_addr);
// Store pattern length in constant map.
GDScriptCodeGenerator::Address dict_length_addr = codegen.add_constant(p_pattern->rest_used ? p_pattern->dictionary.size() - 1 : p_pattern->dictionary.size());
// Get user's dictionary length.
temp_type.builtin_type = Variant::INT;
GDScriptCodeGenerator::Address value_length_addr = codegen.add_temporary(temp_type);
Vector<GDScriptCodeGenerator::Address> func_args;
func_args.push_back(p_value_addr);
codegen.generator->write_call_gdscript_utility(value_length_addr, GDScriptUtilityFunctions::get_function("len"), func_args);
// Test length compatibility.
temp_type.builtin_type = Variant::BOOL;
GDScriptCodeGenerator::Address length_compat_addr = codegen.add_temporary(temp_type);
codegen.generator->write_binary_operator(length_compat_addr, p_pattern->rest_used ? Variant::OP_GREATER_EQUAL : Variant::OP_EQUAL, value_length_addr, dict_length_addr);
codegen.generator->write_and_right_operand(length_compat_addr);
// AND type and length check.
codegen.generator->write_end_and(result_addr);
// Remove length temporaries.
codegen.generator->pop_temporary();
codegen.generator->pop_temporary();
// Create temporaries outside the loop so they can be reused.
GDScriptCodeGenerator::Address element_addr = codegen.add_temporary();
GDScriptCodeGenerator::Address element_type_addr = codegen.add_temporary();
// Evaluate element by element.
for (int i = 0; i < p_pattern->dictionary.size(); i++) {
const GDScriptParser::PatternNode::Pair &element = p_pattern->dictionary[i];
if (element.value_pattern && element.value_pattern->pattern_type == GDScriptParser::PatternNode::PT_REST) {
// Ignore rest pattern.
break;
}
// Use AND here too, as we don't want to be checking elements if previous test failed (which means this might be an invalid get).
codegen.generator->write_and_left_operand(result_addr);
// Get the pattern key.
GDScriptCodeGenerator::Address pattern_key_addr = _parse_expression(codegen, r_error, element.key);
if (r_error) {
return GDScriptCodeGenerator::Address();
}
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// Check if pattern key exists in user's dictionary. This will be AND-ed with next result.
func_args.clear();
func_args.push_back(pattern_key_addr);
codegen.generator->write_call(result_addr, p_value_addr, "has", func_args);
if (element.value_pattern != nullptr) {
// Use AND here too, as we don't want to be checking elements if previous test failed (which means this might be an invalid get).
codegen.generator->write_and_left_operand(result_addr);
// Get actual value from user dictionary.
codegen.generator->write_get(element_addr, pattern_key_addr, p_value_addr);
// Also get type of value.
func_args.clear();
func_args.push_back(element_addr);
codegen.generator->write_call_utility(element_type_addr, "typeof", func_args);
// Try the pattern inside the value.
result_addr = _parse_match_pattern(codegen, r_error, element.value_pattern, element_addr, element_type_addr, result_addr, false, true);
if (r_error != OK) {
return GDScriptCodeGenerator::Address();
}
codegen.generator->write_and_right_operand(result_addr);
codegen.generator->write_end_and(result_addr);
}
codegen.generator->write_and_right_operand(result_addr);
codegen.generator->write_end_and(result_addr);
// Remove pattern key temporary.
if (pattern_key_addr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
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}
// Remove element temporaries.
codegen.generator->pop_temporary();
codegen.generator->pop_temporary();
// If this isn't the first, we need to OR with the previous pattern. If it's nested, we use AND instead.
if (p_is_nested) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_and_right_operand(result_addr);
codegen.generator->write_end_and(p_previous_test);
} else if (!p_is_first) {
// Use the previous value as target, since we only need one temporary variable.
codegen.generator->write_or_right_operand(result_addr);
codegen.generator->write_end_or(p_previous_test);
} else {
// Just assign this value to the accumulator temporary.
codegen.generator->write_assign(p_previous_test, result_addr);
}
codegen.generator->pop_temporary(); // Remove temp result addr.
return p_previous_test;
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} break;
case GDScriptParser::PatternNode::PT_REST:
// Do nothing.
return p_previous_test;
break;
case GDScriptParser::PatternNode::PT_BIND: {
if (p_is_nested) {
codegen.generator->write_and_left_operand(p_previous_test);
} else if (!p_is_first) {
codegen.generator->write_or_left_operand(p_previous_test);
}
// Get the bind address.
GDScriptCodeGenerator::Address bind = codegen.locals[p_pattern->bind->name];
// Assign value to bound variable.
codegen.generator->write_assign(bind, p_value_addr);
}
[[fallthrough]]; // Act like matching anything too.
case GDScriptParser::PatternNode::PT_WILDCARD:
// If this is a fall through we don't want to do this again.
if (p_pattern->pattern_type != GDScriptParser::PatternNode::PT_BIND) {
if (p_is_nested) {
codegen.generator->write_and_left_operand(p_previous_test);
} else if (!p_is_first) {
codegen.generator->write_or_left_operand(p_previous_test);
}
}
// This matches anything so just do the same as `if(true)`.
// If this isn't the first, we need to OR with the previous pattern. If it's nested, we use AND instead.
if (p_is_nested) {
// Use the operator with the `true` constant so it works as always matching.
GDScriptCodeGenerator::Address constant = codegen.add_constant(true);
codegen.generator->write_and_right_operand(constant);
codegen.generator->write_end_and(p_previous_test);
} else if (!p_is_first) {
// Use the operator with the `true` constant so it works as always matching.
GDScriptCodeGenerator::Address constant = codegen.add_constant(true);
codegen.generator->write_or_right_operand(constant);
codegen.generator->write_end_or(p_previous_test);
} else {
// Just assign this value to the accumulator temporary.
codegen.generator->write_assign_true(p_previous_test);
}
return p_previous_test;
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}
ERR_FAIL_V_MSG(p_previous_test, "Reaching the end of pattern compilation without matching a pattern.");
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}
void GDScriptCompiler::_add_locals_in_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block) {
for (int i = 0; i < p_block->locals.size(); i++) {
if (p_block->locals[i].type == GDScriptParser::SuiteNode::Local::PARAMETER || p_block->locals[i].type == GDScriptParser::SuiteNode::Local::FOR_VARIABLE) {
// Parameters are added directly from function and loop variables are declared explicitly.
continue;
}
codegen.add_local(p_block->locals[i].name, _gdtype_from_datatype(p_block->locals[i].get_datatype()));
}
}
Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block, bool p_add_locals) {
Error error = OK;
GDScriptCodeGenerator *gen = codegen.generator;
codegen.start_block();
if (p_add_locals) {
_add_locals_in_block(codegen, p_block);
}
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for (int i = 0; i < p_block->statements.size(); i++) {
const GDScriptParser::Node *s = p_block->statements[i];
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#ifdef DEBUG_ENABLED
// Add a newline before each statement, since the debugger needs those.
gen->write_newline(s->start_line);
#endif
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switch (s->type) {
case GDScriptParser::Node::MATCH: {
const GDScriptParser::MatchNode *match = static_cast<const GDScriptParser::MatchNode *>(s);
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gen->start_match();
codegen.start_block();
// Evaluate the match expression.
GDScriptCodeGenerator::Address value = codegen.add_local("@match_value", _gdtype_from_datatype(match->test->get_datatype()));
GDScriptCodeGenerator::Address value_expr = _parse_expression(codegen, error, match->test);
if (error) {
return error;
}
// Assign to local.
// TODO: This can be improved by passing the target to parse_expression().
gen->write_assign(value, value_expr);
if (value_expr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
// Then, let's save the type of the value in the stack too, so we can reuse for later comparisons.
GDScriptDataType typeof_type;
typeof_type.has_type = true;
typeof_type.kind = GDScriptDataType::BUILTIN;
typeof_type.builtin_type = Variant::INT;
GDScriptCodeGenerator::Address type = codegen.add_local("@match_type", typeof_type);
Vector<GDScriptCodeGenerator::Address> typeof_args;
typeof_args.push_back(value);
gen->write_call_utility(type, "typeof", typeof_args);
// Now we can actually start testing.
// For each branch.
for (int j = 0; j < match->branches.size(); j++) {
if (j > 0) {
// Use `else` to not check the next branch after matching.
gen->write_else();
}
const GDScriptParser::MatchBranchNode *branch = match->branches[j];
gen->start_match_branch(); // Need so lower level code can patch 'continue' jumps.
codegen.start_block(); // Create an extra block around for binds.
// Add locals in block before patterns, so temporaries don't use the stack address for binds.
_add_locals_in_block(codegen, branch->block);
#ifdef DEBUG_ENABLED
// Add a newline before each branch, since the debugger needs those.
gen->write_newline(branch->start_line);
#endif
// For each pattern in branch.
GDScriptCodeGenerator::Address pattern_result = codegen.add_temporary();
for (int k = 0; k < branch->patterns.size(); k++) {
pattern_result = _parse_match_pattern(codegen, error, branch->patterns[k], value, type, pattern_result, k == 0, false);
if (error != OK) {
return error;
}
}
// Check if pattern did match.
gen->write_if(pattern_result);
// Remove the result from stack.
gen->pop_temporary();
// Parse the branch block.
error = _parse_block(codegen, branch->block, false); // Don't add locals again.
if (error) {
return error;
}
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codegen.end_block(); // Get out of extra block.
}
// End all nested `if`s.
for (int j = 0; j < match->branches.size(); j++) {
gen->write_endif();
}
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gen->end_match();
} break;
case GDScriptParser::Node::IF: {
const GDScriptParser::IfNode *if_n = static_cast<const GDScriptParser::IfNode *>(s);
GDScriptCodeGenerator::Address condition = _parse_expression(codegen, error, if_n->condition);
if (error) {
return error;
}
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gen->write_if(condition);
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if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
error = _parse_block(codegen, if_n->true_block);
if (error) {
return error;
}
if (if_n->false_block) {
gen->write_else();
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error = _parse_block(codegen, if_n->false_block);
if (error) {
return error;
}
}
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gen->write_endif();
} break;
case GDScriptParser::Node::FOR: {
const GDScriptParser::ForNode *for_n = static_cast<const GDScriptParser::ForNode *>(s);
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codegen.start_block();
GDScriptCodeGenerator::Address iterator = codegen.add_local(for_n->variable->name, _gdtype_from_datatype(for_n->variable->get_datatype()));
gen->start_for(iterator.type, _gdtype_from_datatype(for_n->list->get_datatype()));
GDScriptCodeGenerator::Address list = _parse_expression(codegen, error, for_n->list);
if (error) {
return error;
}
gen->write_for_assignment(iterator, list);
if (list.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
gen->write_for();
error = _parse_block(codegen, for_n->loop);
if (error) {
return error;
}
gen->write_endfor();
codegen.end_block();
} break;
case GDScriptParser::Node::WHILE: {
const GDScriptParser::WhileNode *while_n = static_cast<const GDScriptParser::WhileNode *>(s);
gen->start_while_condition();
GDScriptCodeGenerator::Address condition = _parse_expression(codegen, error, while_n->condition);
if (error) {
return error;
}
gen->write_while(condition);
if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
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error = _parse_block(codegen, while_n->loop);
if (error) {
return error;
}
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gen->write_endwhile();
} break;
case GDScriptParser::Node::BREAK: {
gen->write_break();
} break;
case GDScriptParser::Node::CONTINUE: {
const GDScriptParser::ContinueNode *cont = static_cast<const GDScriptParser::ContinueNode *>(s);
if (cont->is_for_match) {
gen->write_continue_match();
} else {
gen->write_continue();
}
} break;
case GDScriptParser::Node::RETURN: {
const GDScriptParser::ReturnNode *return_n = static_cast<const GDScriptParser::ReturnNode *>(s);
GDScriptCodeGenerator::Address return_value;
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if (return_n->return_value != nullptr) {
return_value = _parse_expression(codegen, error, return_n->return_value);
if (error) {
return error;
}
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}
gen->write_return(return_value);
if (return_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
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} break;
case GDScriptParser::Node::ASSERT: {
#ifdef DEBUG_ENABLED
const GDScriptParser::AssertNode *as = static_cast<const GDScriptParser::AssertNode *>(s);
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GDScriptCodeGenerator::Address condition = _parse_expression(codegen, error, as->condition);
if (error) {
return error;
}
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GDScriptCodeGenerator::Address message;
if (as->message) {
message = _parse_expression(codegen, error, as->message);
if (error) {
return error;
}
}
gen->write_assert(condition, message);
if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
if (message.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
#endif
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} break;
case GDScriptParser::Node::BREAKPOINT: {
#ifdef DEBUG_ENABLED
gen->write_breakpoint();
#endif
} break;
case GDScriptParser::Node::VARIABLE: {
const GDScriptParser::VariableNode *lv = static_cast<const GDScriptParser::VariableNode *>(s);
// Should be already in stack when the block began.
GDScriptCodeGenerator::Address local = codegen.locals[lv->identifier->name];
GDScriptParser::DataType local_type = lv->get_datatype();
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if (lv->initializer != nullptr) {
// For typed arrays we need to make sure this is already initialized correctly so typed assignment work.
if (local_type.is_hard_type() && local_type.builtin_type == Variant::ARRAY) {
if (local_type.has_container_element_type()) {
codegen.generator->write_construct_typed_array(local, _gdtype_from_datatype(local_type.get_container_element_type(), codegen.script), Vector<GDScriptCodeGenerator::Address>());
} else {
codegen.generator->write_construct_array(local, Vector<GDScriptCodeGenerator::Address>());
}
}
GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, error, lv->initializer);
if (error) {
return error;
}
if (lv->use_conversion_assign) {
gen->write_assign_with_conversion(local, src_address);
} else {
gen->write_assign(local, src_address);
}
if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
} else if (lv->get_datatype().is_hard_type()) {
// Initialize with default for type.
if (local_type.has_container_element_type()) {
codegen.generator->write_construct_typed_array(local, _gdtype_from_datatype(local_type.get_container_element_type(), codegen.script), Vector<GDScriptCodeGenerator::Address>());
} else if (local_type.kind == GDScriptParser::DataType::BUILTIN) {
codegen.generator->write_construct(local, local_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
}
// The `else` branch is for objects, in such case we leave it as `null`.
}
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} break;
case GDScriptParser::Node::CONSTANT: {
// Local constants.
const GDScriptParser::ConstantNode *lc = static_cast<const GDScriptParser::ConstantNode *>(s);
if (!lc->initializer->is_constant) {
_set_error("Local constant must have a constant value as initializer.", lc->initializer);
return ERR_PARSE_ERROR;
}
codegen.add_local_constant(lc->identifier->name, lc->initializer->reduced_value);
} break;
case GDScriptParser::Node::PASS:
// Nothing to do.
break;
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default: {
// Expression.
if (s->is_expression()) {
GDScriptCodeGenerator::Address expr = _parse_expression(codegen, error, static_cast<const GDScriptParser::ExpressionNode *>(s), true);
if (error) {
return error;
}
if (expr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
} else {
ERR_FAIL_V_MSG(ERR_INVALID_DATA, "Bug in bytecode compiler, unexpected node in parse tree while parsing statement."); // Unreachable code.
}
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} break;
}
}
codegen.end_block();
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return OK;
}
GDScriptFunction *GDScriptCompiler::_parse_function(Error &r_error, GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::FunctionNode *p_func, bool p_for_ready, bool p_for_lambda) {
r_error = OK;
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CodeGen codegen;
codegen.generator = memnew(GDScriptByteCodeGenerator);
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codegen.class_node = p_class;
codegen.script = p_script;
codegen.function_node = p_func;
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StringName func_name;
bool is_static = false;
Multiplayer::RPCConfig rpc_config;
GDScriptDataType return_type;
return_type.has_type = true;
return_type.kind = GDScriptDataType::BUILTIN;
return_type.builtin_type = Variant::NIL;
if (p_func) {
if (p_func->identifier) {
func_name = p_func->identifier->name;
} else {
func_name = "<anonymous lambda>";
}
is_static = p_func->is_static;
rpc_config = p_func->rpc_config;
return_type = _gdtype_from_datatype(p_func->get_datatype(), p_script);
} else {
if (p_for_ready) {
func_name = "_ready";
} else {
func_name = "@implicit_new";
}
}
codegen.function_name = func_name;
codegen.generator->write_start(p_script, func_name, is_static, rpc_config, return_type);
int optional_parameters = 0;
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if (p_func) {
for (int i = 0; i < p_func->parameters.size(); i++) {
const GDScriptParser::ParameterNode *parameter = p_func->parameters[i];
GDScriptDataType par_type = _gdtype_from_datatype(parameter->get_datatype(), p_script);
uint32_t par_addr = codegen.generator->add_parameter(parameter->identifier->name, parameter->default_value != nullptr, par_type);
codegen.parameters[parameter->identifier->name] = GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::FUNCTION_PARAMETER, par_addr, par_type);
if (p_func->parameters[i]->default_value != nullptr) {
optional_parameters++;
}
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}
}
// Parse initializer if applies.
bool is_implicit_initializer = !p_for_ready && !p_func && !p_for_lambda;
bool is_initializer = p_func && !p_for_lambda && p_func->identifier->name == GDScriptLanguage::get_singleton()->strings._init;
bool is_implicit_ready = !p_func && p_for_ready;
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if (!p_for_lambda && (is_implicit_initializer || is_implicit_ready)) {
// Initialize class fields.
for (int i = 0; i < p_class->members.size(); i++) {
if (p_class->members[i].type != GDScriptParser::ClassNode::Member::VARIABLE) {
continue;
}
const GDScriptParser::VariableNode *field = p_class->members[i].variable;
if (field->onready != is_implicit_ready) {
// Only initialize in @implicit_ready.
continue;
}
GDScriptParser::DataType field_type = field->get_datatype();
GDScriptCodeGenerator::Address dst_address(GDScriptCodeGenerator::Address::MEMBER, codegen.script->member_indices[field->identifier->name].index, _gdtype_from_datatype(field->get_datatype()));
if (field->initializer) {
// Emit proper line change.
codegen.generator->write_newline(field->initializer->start_line);
// For typed arrays we need to make sure this is already initialized correctly so typed assignment work.
if (field_type.is_hard_type() && field_type.builtin_type == Variant::ARRAY && field_type.has_container_element_type()) {
if (field_type.has_container_element_type()) {
codegen.generator->write_construct_typed_array(dst_address, _gdtype_from_datatype(field_type.get_container_element_type(), codegen.script), Vector<GDScriptCodeGenerator::Address>());
} else {
codegen.generator->write_construct_array(dst_address, Vector<GDScriptCodeGenerator::Address>());
}
}
GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, r_error, field->initializer, false, true);
if (r_error) {
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memdelete(codegen.generator);
return nullptr;
}
if (field->use_conversion_assign) {
codegen.generator->write_assign_with_conversion(dst_address, src_address);
} else {
codegen.generator->write_assign(dst_address, src_address);
}
if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
} else if (field->get_datatype().is_hard_type()) {
codegen.generator->write_newline(field->start_line);
// Initialize with default for type.
if (field_type.has_container_element_type()) {
codegen.generator->write_construct_typed_array(dst_address, _gdtype_from_datatype(field_type.get_container_element_type(), codegen.script), Vector<GDScriptCodeGenerator::Address>());
} else if (field_type.kind == GDScriptParser::DataType::BUILTIN) {
codegen.generator->write_construct(dst_address, field_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
}
// The `else` branch is for objects, in such case we leave it as `null`.
}
}
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}
// Parse default argument code if applies.
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if (p_func) {
if (optional_parameters > 0) {
codegen.generator->start_parameters();
for (int i = p_func->parameters.size() - optional_parameters; i < p_func->parameters.size(); i++) {
const GDScriptParser::ParameterNode *parameter = p_func->parameters[i];
GDScriptCodeGenerator::Address src_addr = _parse_expression(codegen, r_error, parameter->default_value);
if (r_error) {
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memdelete(codegen.generator);
return nullptr;
}
GDScriptCodeGenerator::Address dst_addr = codegen.parameters[parameter->identifier->name];
codegen.generator->write_assign_default_parameter(dst_addr, src_addr);
if (src_addr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
codegen.generator->pop_temporary();
}
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}
codegen.generator->end_parameters();
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}
r_error = _parse_block(codegen, p_func->body);
if (r_error) {
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memdelete(codegen.generator);
return nullptr;
}
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}
#ifdef DEBUG_ENABLED
if (EngineDebugger::is_active()) {
String signature;
// Path.
if (!p_script->get_path().is_empty()) {
signature += p_script->get_path();
}
// Location.
if (p_func) {
signature += "::" + itos(p_func->body->start_line);
} else {
signature += "::0";
}
// Function and class.
if (p_class->identifier) {
signature += "::" + String(p_class->identifier->name) + "." + String(func_name);
} else {
signature += "::" + String(func_name);
}
if (p_for_lambda) {
signature += "(lambda)";
}
codegen.generator->set_signature(signature);
}
#endif
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if (p_func) {
codegen.generator->set_initial_line(p_func->start_line);
#ifdef TOOLS_ENABLED
if (!p_for_lambda) {
p_script->member_lines[func_name] = p_func->start_line;
p_script->doc_functions[func_name] = p_func->doc_description;
}
#endif
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} else {
codegen.generator->set_initial_line(0);
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}
GDScriptFunction *gd_function = codegen.generator->write_end();
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if (is_initializer) {
p_script->initializer = gd_function;
} else if (is_implicit_initializer) {
p_script->implicit_initializer = gd_function;
} else if (is_implicit_ready) {
p_script->implicit_ready = gd_function;
}
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if (p_func) {
// if no return statement -> return type is void not unresolved Variant
if (p_func->body->has_return) {
gd_function->return_type = _gdtype_from_datatype(p_func->get_datatype(), p_script);
} else {
gd_function->return_type = GDScriptDataType();
gd_function->return_type.has_type = true;
gd_function->return_type.kind = GDScriptDataType::BUILTIN;
gd_function->return_type.builtin_type = Variant::NIL;
}
#ifdef TOOLS_ENABLED
gd_function->default_arg_values = p_func->default_arg_values;
#endif
}
if (!is_implicit_initializer && !is_implicit_ready && !p_for_lambda) {
p_script->member_functions[func_name] = gd_function;
}
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memdelete(codegen.generator);
return gd_function;
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}
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Error GDScriptCompiler::_parse_setter_getter(GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::VariableNode *p_variable, bool p_is_setter) {
Error error = OK;
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GDScriptParser::FunctionNode *function;
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if (p_is_setter) {
function = p_variable->setter;
} else {
function = p_variable->getter;
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}
_parse_function(error, p_script, p_class, function);
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return error;
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}
Error GDScriptCompiler::_parse_class_level(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
parsing_classes.insert(p_script);
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if (p_class->outer && p_class->outer->outer) {
// 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->identifier->name) + "'.", p_class);
return ERR_PARSE_ERROR;
}
Error err = _parse_class_level(p_script->_owner, p_class->outer, p_keep_state);
if (err) {
return err;
}
}
}
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#ifdef TOOLS_ENABLED
p_script->doc_functions.clear();
p_script->doc_variables.clear();
p_script->doc_constants.clear();
p_script->doc_enums.clear();
p_script->doc_signals.clear();
p_script->doc_tutorials.clear();
p_script->doc_brief_description = p_class->doc_brief_description;
p_script->doc_description = p_class->doc_description;
for (int i = 0; i < p_class->doc_tutorials.size(); i++) {
DocData::TutorialDoc td;
td.title = p_class->doc_tutorials[i].first;
td.link = p_class->doc_tutorials[i].second;
p_script->doc_tutorials.append(td);
}
#endif
p_script->native = Ref<GDScriptNativeClass>();
p_script->base = Ref<GDScript>();
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p_script->_base = nullptr;
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p_script->members.clear();
p_script->constants.clear();
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for (const KeyValue<StringName, GDScriptFunction *> &E : p_script->member_functions) {
memdelete(E.value);
}
if (p_script->implicit_initializer) {
memdelete(p_script->implicit_initializer);
}
if (p_script->implicit_ready) {
memdelete(p_script->implicit_ready);
}
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p_script->member_functions.clear();
p_script->member_indices.clear();
p_script->member_info.clear();
p_script->_signals.clear();
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p_script->initializer = nullptr;
p_script->implicit_initializer = nullptr;
p_script->implicit_ready = nullptr;
p_script->tool = parser->is_tool();
p_script->name = p_class->identifier ? p_class->identifier->name : "";
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if (!p_script->name.is_empty()) {
if (ClassDB::class_exists(p_script->name) && ClassDB::is_class_exposed(p_script->name)) {
_set_error("The class '" + p_script->name + "' shadows a native class", p_class);
return ERR_ALREADY_EXISTS;
}
}
Ref<GDScriptNativeClass> native;
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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<GDScript>(base_type.script_type);
p_script->base = base;
p_script->_base = base.ptr();
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if (p_class->base_type.kind == GDScriptParser::DataType::CLASS && p_class->base_type.class_type != nullptr) {
if (p_class->base_type.script_path == main_script->path) {
if (!parsed_classes.has(p_script->_base)) {
if (parsing_classes.has(p_script->_base)) {
String class_name = p_class->identifier ? p_class->identifier->name : "<main>";
_set_error("Cyclic class reference for '" + 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;
}
}
} else {
Error err = OK;
base = GDScriptCache::get_full_script(p_class->base_type.script_path, err, main_script->path);
if (err) {
return err;
}
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if (base.is_null() || !base->is_valid()) {
return ERR_COMPILATION_FAILED;
}
}
}
p_script->member_indices = base->member_indices;
native = base->native;
p_script->native = native;
} break;
default: {
_set_error("Parser bug: invalid inheritance.", p_class);
return ERR_BUG;
} break;
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}
for (int i = 0; i < p_class->members.size(); i++) {
const GDScriptParser::ClassNode::Member &member = p_class->members[i];
switch (member.type) {
case GDScriptParser::ClassNode::Member::VARIABLE: {
const GDScriptParser::VariableNode *variable = member.variable;
StringName name = variable->identifier->name;
GDScript::MemberInfo minfo;
minfo.index = p_script->member_indices.size();
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switch (variable->property) {
case GDScriptParser::VariableNode::PROP_NONE:
break; // Nothing to do.
case GDScriptParser::VariableNode::PROP_SETGET:
if (variable->setter_pointer != nullptr) {
minfo.setter = variable->setter_pointer->name;
}
if (variable->getter_pointer != nullptr) {
minfo.getter = variable->getter_pointer->name;
}
break;
case GDScriptParser::VariableNode::PROP_INLINE:
if (variable->setter != nullptr) {
minfo.setter = "@" + variable->identifier->name + "_setter";
}
if (variable->getter != nullptr) {
minfo.getter = "@" + variable->identifier->name + "_getter";
}
break;
}
minfo.data_type = _gdtype_from_datatype(variable->get_datatype(), p_script);
PropertyInfo prop_info = minfo.data_type;
prop_info.name = name;
PropertyInfo export_info = variable->export_info;
if (variable->exported) {
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 | PROPERTY_USAGE_SCRIPT_VARIABLE;
} else {
prop_info.usage = PROPERTY_USAGE_SCRIPT_VARIABLE;
}
#ifdef TOOLS_ENABLED
p_script->doc_variables[name] = variable->doc_description;
#endif
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p_script->member_info[name] = prop_info;
p_script->member_indices[name] = minfo;
p_script->members.insert(name);
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#ifdef TOOLS_ENABLED
if (variable->initializer != nullptr && variable->initializer->is_constant) {
p_script->member_default_values[name] = variable->initializer->reduced_value;
} else {
p_script->member_default_values.erase(name);
}
p_script->member_lines[name] = variable->start_line;
#endif
} break;
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case GDScriptParser::ClassNode::Member::CONSTANT: {
const GDScriptParser::ConstantNode *constant = member.constant;
StringName name = constant->identifier->name;
p_script->constants.insert(name, constant->initializer->reduced_value);
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = constant->start_line;
if (!constant->doc_description.is_empty()) {
p_script->doc_constants[name] = constant->doc_description;
}
#endif
} break;
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case GDScriptParser::ClassNode::Member::ENUM_VALUE: {
const GDScriptParser::EnumNode::Value &enum_value = member.enum_value;
StringName name = enum_value.identifier->name;
p_script->constants.insert(name, enum_value.value);
#ifdef TOOLS_ENABLED
p_script->member_lines[name] = enum_value.identifier->start_line;
if (!p_script->doc_enums.has("@unnamed_enums")) {
p_script->doc_enums["@unnamed_enums"] = DocData::EnumDoc();
p_script->doc_enums["@unnamed_enums"].name = "@unnamed_enums";
}
DocData::ConstantDoc const_doc;
const_doc.name = enum_value.identifier->name;
const_doc.value = Variant(enum_value.value).operator String(); // TODO-DOC: enum value currently is int.
const_doc.description = enum_value.doc_description;
p_script->doc_enums["@unnamed_enums"].values.push_back(const_doc);
#endif
} break;
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case GDScriptParser::ClassNode::Member::SIGNAL: {
const GDScriptParser::SignalNode *signal = member.signal;
StringName name = signal->identifier->name;
Vector<StringName> parameters_names;
parameters_names.resize(signal->parameters.size());
for (int j = 0; j < signal->parameters.size(); j++) {
parameters_names.write[j] = signal->parameters[j]->identifier->name;
}
p_script->_signals[name] = parameters_names;
#ifdef TOOLS_ENABLED
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if (!signal->doc_description.is_empty()) {
p_script->doc_signals[name] = signal->doc_description;
}
#endif
} break;
case GDScriptParser::ClassNode::Member::ENUM: {
const GDScriptParser::EnumNode *enum_n = member.m_enum;
// TODO: Make enums not be just a dictionary?
Dictionary new_enum;
for (int j = 0; j < enum_n->values.size(); j++) {
int value = enum_n->values[j].value;
// Needs to be string because Variant::get will convert to String.
new_enum[String(enum_n->values[j].identifier->name)] = value;
}
p_script->constants.insert(enum_n->identifier->name, new_enum);
#ifdef TOOLS_ENABLED
p_script->member_lines[enum_n->identifier->name] = enum_n->start_line;
p_script->doc_enums[enum_n->identifier->name] = DocData::EnumDoc();
p_script->doc_enums[enum_n->identifier->name].name = enum_n->identifier->name;
p_script->doc_enums[enum_n->identifier->name].description = enum_n->doc_description;
for (int j = 0; j < enum_n->values.size(); j++) {
DocData::ConstantDoc const_doc;
const_doc.name = enum_n->values[j].identifier->name;
const_doc.value = Variant(enum_n->values[j].value).operator String();
const_doc.description = enum_n->values[j].doc_description;
p_script->doc_enums[enum_n->identifier->name].values.push_back(const_doc);
}
#endif
} break;
case GDScriptParser::ClassNode::Member::GROUP: {
const GDScriptParser::AnnotationNode *annotation = member.annotation;
StringName name = annotation->export_info.name;
// This is not a normal member, but we need this to keep indices in order.
GDScript::MemberInfo minfo;
minfo.index = p_script->member_indices.size();
PropertyInfo prop_info;
prop_info.name = name;
prop_info.usage = annotation->export_info.usage;
prop_info.hint_string = annotation->export_info.hint_string;
p_script->member_info[name] = prop_info;
p_script->member_indices[name] = minfo;
p_script->members.insert(name);
} break;
default:
break; // Nothing to do here.
}
}
parsed_classes.insert(p_script);
parsing_classes.erase(p_script);
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//parse sub-classes
for (int i = 0; i < p_class->members.size(); i++) {
const GDScriptParser::ClassNode::Member &member = p_class->members[i];
if (member.type != member.CLASS) {
continue;
}
const GDScriptParser::ClassNode *inner_class = member.m_class;
StringName name = inner_class->identifier->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, inner_class, p_keep_state);
if (err) {
return err;
}
}
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#ifdef TOOLS_ENABLED
p_script->member_lines[name] = inner_class->start_line;
#endif
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p_script->constants.insert(name, subclass); //once parsed, goes to the list of constants
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}
return OK;
}
Error GDScriptCompiler::_parse_class_blocks(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
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//parse methods
for (int i = 0; i < p_class->members.size(); i++) {
const GDScriptParser::ClassNode::Member &member = p_class->members[i];
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if (member.type == member.FUNCTION) {
const GDScriptParser::FunctionNode *function = member.function;
Error err = OK;
_parse_function(err, p_script, p_class, function);
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if (err) {
return err;
}
} else if (member.type == member.VARIABLE) {
const GDScriptParser::VariableNode *variable = member.variable;
if (variable->property == GDScriptParser::VariableNode::PROP_INLINE) {
if (variable->setter != nullptr) {
Error err = _parse_setter_getter(p_script, p_class, variable, true);
if (err) {
return err;
}
}
if (variable->getter != nullptr) {
Error err = _parse_setter_getter(p_script, p_class, variable, false);
if (err) {
return err;
}
}
}
}
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}
{
// Create an implicit constructor in any case.
Error err = OK;
_parse_function(err, p_script, p_class, nullptr);
if (err) {
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return err;
}
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}
if (p_class->onready_used) {
// Create an implicit_ready constructor.
Error err = OK;
_parse_function(err, p_script, p_class, nullptr, true);
if (err) {
return err;
}
}
#ifdef DEBUG_ENABLED
//validate instances if keeping state
if (p_keep_state) {
for (RBSet<Object *>::Element *E = p_script->instances.front(); E;) {
RBSet<Object *>::Element *N = E->next();
ScriptInstance *si = E->get()->get_script_instance();
if (si->is_placeholder()) {
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#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);
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instance->base_ref_counted = Object::cast_to<RefCounted>(E->get());
instance->members.resize(p_script->member_indices.size());
instance->script = Ref<GDScript>(p_script);
instance->owner = E->get();
//needed for hot reloading
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for (const KeyValue<StringName, GDScript::MemberInfo> &F : p_script->member_indices) {
instance->member_indices_cache[F.key] = F.value.index;
}
instance->owner->set_script_instance(instance);
/* STEP 2, INITIALIZE AND CONSTRUCT */
Callable::CallError ce;
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p_script->initializer->call(instance, nullptr, 0, ce);
if (ce.error != Callable::CallError::CALL_OK) {
//well, tough luck, not gonna do anything here
}
}
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#endif
} else {
GDScriptInstance *gi = static_cast<GDScriptInstance *>(si);
gi->reload_members();
}
E = N;
}
}
#endif
for (int i = 0; i < p_class->members.size(); i++) {
if (p_class->members[i].type != GDScriptParser::ClassNode::Member::CLASS) {
continue;
}
const GDScriptParser::ClassNode *inner_class = p_class->members[i].m_class;
StringName name = inner_class->identifier->name;
GDScript *subclass = p_script->subclasses[name].ptr();
Error err = _parse_class_blocks(subclass, inner_class, p_keep_state);
if (err) {
return err;
}
}
p_script->valid = true;
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return OK;
}
void GDScriptCompiler::_make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
HashMap<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->members.size(); i++) {
if (p_class->members[i].type != GDScriptParser::ClassNode::Member::CLASS) {
continue;
}
const GDScriptParser::ClassNode *inner_class = p_class->members[i].m_class;
StringName name = inner_class->identifier->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.instantiate();
}
}
subclass->_owner = p_script;
subclass->fully_qualified_name = fully_qualified_name;
p_script->subclasses.insert(name, subclass);
_make_scripts(subclass.ptr(), inner_class, 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::ClassNode *root = parser->get_tree();
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source = p_script->get_path();
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// 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, root, p_keep_state);
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p_script->_owner = nullptr;
Error err = _parse_class_level(p_script, root, p_keep_state);
if (err) {
return err;
}
err = _parse_class_blocks(p_script, root, p_keep_state);
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if (err) {
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return err;
}
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return GDScriptCache::finish_compiling(p_script->get_path());
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}
String GDScriptCompiler::get_error() const {
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return error;
}
int GDScriptCompiler::get_error_line() const {
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return err_line;
}
int GDScriptCompiler::get_error_column() const {
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return err_column;
}
GDScriptCompiler::GDScriptCompiler() {
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}