/**************************************************************************/ /* gdscript_compiler.cpp */ /**************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /**************************************************************************/ /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /**************************************************************************/ #include "gdscript_compiler.h" #include "gdscript.h" #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 (_is_local_or_parameter(codegen, p_name)) { return false; //shadowed } return _is_class_member_property(codegen.script, p_name); } bool GDScriptCompiler::_is_class_member_property(GDScript *owner, const StringName &p_name) { GDScript *scr = owner; GDScriptNativeClass *nc = 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); } bool GDScriptCompiler::_is_local_or_parameter(CodeGen &codegen, const StringName &p_name) { return codegen.parameters.has(p_name) || codegen.locals.has(p_name); } void GDScriptCompiler::_set_error(const String &p_error, const GDScriptParser::Node *p_node) { if (!error.is_empty()) { return; } 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; } } GDScriptDataType GDScriptCompiler::_gdtype_from_datatype(const GDScriptParser::DataType &p_datatype, GDScript *p_owner) { if (!p_datatype.is_set() || !p_datatype.is_hard_type()) { return GDScriptDataType(); } GDScriptDataType result; result.has_type = true; 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.builtin_type = p_datatype.builtin_type; result.script_type_ref = p_datatype.script_type; result.script_type = result.script_type_ref.ptr(); result.native_type = p_datatype.native_type; } break; case GDScriptParser::DataType::CLASS: { result.kind = GDScriptDataType::GDSCRIPT; result.builtin_type = p_datatype.builtin_type; result.native_type = p_datatype.native_type; bool is_local_class = parser->has_class(p_datatype.class_type); Ref script; if (is_local_class) { script = Ref(main_script); } else { Error err = OK; script = GDScriptCache::get_shallow_script(p_datatype.script_path, err, p_owner->path); if (err) { _set_error(vformat(R"(Could not find script "%s": %s)", p_datatype.script_path, error_names[err]), nullptr); } } if (script.is_valid()) { script = Ref(script->find_class(p_datatype.class_type->fqcn)); } if (script.is_null()) { _set_error(vformat(R"(Could not find class "%s" in "%s".)", p_datatype.class_type->fqcn, p_datatype.script_path), nullptr); return GDScriptDataType(); } else { // Only hold a strong reference if the owner of the element qualified with this type is not local, to avoid cyclic references (leaks). // TODO: Might lead to use after free if script_type is a subclass and is used after its parent is freed. if (!is_local_class) { result.script_type_ref = script; } result.script_type = script.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; case GDScriptParser::DataType::RESOLVING: case GDScriptParser::DataType::UNRESOLVED: { ERR_PRINT("Parser bug: converting unresolved type."); return GDScriptDataType(); } } if (p_datatype.has_container_element_type()) { result.set_container_element_type(_gdtype_from_datatype(p_datatype.get_container_element_type(), p_owner)); } return result; } 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 &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) { if (p_expression->is_constant) { return codegen.add_constant(p_expression->reduced_value); } GDScriptCodeGenerator *gen = codegen.generator; switch (p_expression->type) { case GDScriptParser::Node::IDENTIFIER: { // Look for identifiers in current scope. const GDScriptParser::IdentifierNode *in = static_cast(p_expression); 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. if (codegen.script->member_indices.has(identifier)) { 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 args; // No argument needed. gen->write_call_self(temp, codegen.script->member_indices[identifier].getter, args); return temp; } else { // No getter or inside getter: direct member access., int idx = codegen.script->member_indices[identifier].index; return GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::MEMBER, idx, codegen.script->get_member_type(identifier)); } } } // 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; } // Class C++ integer constant. if (nc) { bool success = false; int64_t constant = ClassDB::get_integer_constant(nc->get_name(), identifier, &success); if (success) { return codegen.add_constant(constant); } } owner = owner->_owner; } } // 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; } } base_class = base_class->base_type.class_type; } // 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; } 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. 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 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(), codegen.script)); 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); } } // 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 res; if (class_node->identifier && class_node->identifier->name == identifier) { res = Ref(main_script); } else { String global_class_path = ScriptServer::get_global_class_path(identifier); if (ResourceLoader::get_resource_type(global_class_path) == "GDScript") { Error err = OK; res = GDScriptCache::get_full_script(global_class_path, err); if (err != OK) { _set_error("Can't load global class " + String(identifier), p_expression); r_error = ERR_COMPILATION_FAILED; return GDScriptCodeGenerator::Address(); } } else { res = ResourceLoader::load(global_class_path); 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(); } break; case GDScriptParser::Node::LITERAL: { // Return constant. const GDScriptParser::LiteralNode *cn = static_cast(p_expression); return codegen.add_constant(cn->value); } break; case GDScriptParser::Node::SELF: { //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(); } return GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF); } break; case GDScriptParser::Node::ARRAY: { const GDScriptParser::ArrayNode *an = static_cast(p_expression); Vector values; // Create the result temporary first since it's the last to be killed. GDScriptDataType array_type = _gdtype_from_datatype(an->get_datatype(), codegen.script); GDScriptCodeGenerator::Address result = codegen.add_temporary(array_type); 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); } 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(); } } return result; } break; case GDScriptParser::Node::DICTIONARY: { const GDScriptParser::DictionaryNode *dn = static_cast(p_expression); Vector elements; // 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); 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; } elements.push_back(element); element = _parse_expression(codegen, r_error, dn->elements[i].value); if (r_error) { return GDScriptCodeGenerator::Address(); } elements.push_back(element); } gen->write_construct_dictionary(result, elements); for (int i = 0; i < elements.size(); i++) { if (elements[i].mode == GDScriptCodeGenerator::Address::TEMPORARY) { gen->pop_temporary(); } } return result; } break; case GDScriptParser::Node::CAST: { const GDScriptParser::CastNode *cn = static_cast(p_expression); GDScriptParser::DataType og_cast_type = cn->get_datatype(); GDScriptDataType cast_type = _gdtype_from_datatype(og_cast_type, codegen.script); GDScriptCodeGenerator::Address result; if (cast_type.has_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. result = codegen.add_temporary(cast_type); GDScriptCodeGenerator::Address src = _parse_expression(codegen, r_error, cn->operand); gen->write_cast(result, src, cast_type); if (src.mode == GDScriptCodeGenerator::Address::TEMPORARY) { gen->pop_temporary(); } } else { result = _parse_expression(codegen, r_error, cn->operand); } return result; } break; case GDScriptParser::Node::CALL: { const GDScriptParser::CallNode *call = static_cast(p_expression); GDScriptDataType type = _gdtype_from_datatype(call->get_datatype(), codegen.script); GDScriptCodeGenerator::Address result = codegen.add_temporary(type); GDScriptCodeGenerator::Address nil = GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::NIL); GDScriptCodeGenerator::Address return_addr = p_root ? nil : result; Vector 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); } 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(call->callee)->name); gen->write_construct(return_addr, 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(return_addr, 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(return_addr, GDScriptUtilityFunctions::get_function(call->function_name), arguments); } else { // Regular function. const GDScriptParser::ExpressionNode *callee = call->callee; if (call->is_super) { // Super call. gen->write_super_call(return_addr, 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(return_addr, self, method, arguments); } else { // Not exact arguments, but still can use method bind call. gen->write_call_method_bind(return_addr, 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(return_addr, 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(return_addr, 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(call->callee); 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(subscript->base)->name) < Variant::VARIANT_MAX) { gen->write_call_builtin_type_static(return_addr, GDScriptParser::get_builtin_type(static_cast(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(subscript->base)->name) && !Engine::get_singleton()->has_singleton(static_cast(subscript->base)->name)) { // It's a static native method call. gen->write_call_native_static(return_addr, static_cast(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(return_addr, 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(return_addr, base, method, arguments); } else { // Not exact arguments, but still can use method bind call. gen->write_call_method_bind(return_addr, 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(return_addr, 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(); } } } else { _set_error("Cannot call something that isn't a function.", call->callee); r_error = ERR_COMPILATION_FAILED; return GDScriptCodeGenerator::Address(); } } else { r_error = ERR_COMPILATION_FAILED; return GDScriptCodeGenerator::Address(); } } } 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(p_expression); Vector 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(), codegen.script)); MethodBind *get_node_method = ClassDB::get_method("Node", "get_node"); gen->write_call_ptrcall(result, GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF), get_node_method, args); return result; } break; case GDScriptParser::Node::PRELOAD: { const GDScriptParser::PreloadNode *preload = static_cast(p_expression); // Add resource as constant. return codegen.add_constant(preload->resource); } break; case GDScriptParser::Node::AWAIT: { const GDScriptParser::AwaitNode *await = static_cast(p_expression); GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(p_expression->get_datatype(), codegen.script)); 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(p_expression); GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(subscript->get_datatype(), codegen.script)); GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, subscript->base); if (r_error) { return GDScriptCodeGenerator::Address(); } 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) { if (subscript->base->type == GDScriptParser::Node::SELF && codegen.script) { GDScriptParser::IdentifierNode *identifier = subscript->attribute; HashMap::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(), codegen.script)); } } 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(); } } } 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(p_expression); GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(unary->get_datatype(), codegen.script)); 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(p_expression); GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(binary->get_datatype(), codegen.script)); 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); 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_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); 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(binary->right_operand)->name) != Variant::VARIANT_MAX) { // `is` with builtin type) Variant::Type type = GDScriptParser::get_builtin_type(static_cast(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(p_expression); GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(ternary->get_datatype(), codegen.script)); 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(p_expression); if (assignment->assignee->type == GDScriptParser::Node::SUBSCRIPT) { // SET (chained) MODE! const GDScriptParser::SubscriptNode *subscript = static_cast(assignment->assignee); #ifdef DEBUG_ENABLED if (subscript->is_attribute && subscript->base->type == GDScriptParser::Node::SELF && codegen.script) { HashMap::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 */ 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; List 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(n->base); StringName var_name = identifier->name; if (_is_class_member_property(codegen, var_name)) { assign_class_member_property = var_name; } else if (!_is_local_or_parameter(codegen, 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; } } break; } n = static_cast(n->base); } } /* Chain of gets */ // 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(); } GDScriptCodeGenerator::Address prev_base = base; struct ChainInfo { bool is_named = false; GDScriptCodeGenerator::Address base; GDScriptCodeGenerator::Address key; StringName name; }; List set_chain; for (List::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(), codegen.script)); GDScriptCodeGenerator::Address key; StringName name; 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; } // 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(); } } // Perform operator if any. if (assignment->operation != GDScriptParser::AssignmentNode::OP_NONE) { GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype(), codegen.script)); GDScriptCodeGenerator::Address value = codegen.add_temporary(_gdtype_from_datatype(subscript->get_datatype(), codegen.script)); 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; } // 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); 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); } if (!known_type) { gen->write_end_jump_if_shared(); } } 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 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(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; StringName name = static_cast(assignment->assignee)->name; if (has_operation) { GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype(), codegen.script)); GDScriptCodeGenerator::Address member = codegen.add_temporary(_gdtype_from_datatype(assignment->assignee->get_datatype(), codegen.script)); 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; } gen->write_set_member(to_assign, name); 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; bool has_setter = false; bool is_in_setter = false; StringName setter_function; StringName var_name = static_cast(assignment->assignee)->name; if (!_is_local_or_parameter(codegen, 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 } else { target = _parse_expression(codegen, r_error, assignment->assignee); if (r_error) { return GDScriptCodeGenerator::Address(); } } 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(), codegen.script)); 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; } GDScriptDataType assign_type = _gdtype_from_datatype(assignment->assignee->get_datatype(), codegen.script); if (has_setter && !is_in_setter) { // Call setter. Vector 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(p_expression); GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(lambda->get_datatype(), codegen.script)); Vector 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(); } 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; } } 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()); // Equality is always a boolean. GDScriptDataType equality_type; equality_type.has_type = true; equality_type.kind = GDScriptDataType::BUILTIN; equality_type.builtin_type = Variant::BOOL; GDScriptCodeGenerator::Address type_string_addr = codegen.add_constant(Variant::STRING); GDScriptCodeGenerator::Address type_string_name_addr = codegen.add_constant(Variant::STRING_NAME); // 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); // Check if StringName <-> String comparison is possible. GDScriptCodeGenerator::Address type_comp_addr_1 = codegen.add_temporary(equality_type); GDScriptCodeGenerator::Address type_comp_addr_2 = codegen.add_temporary(equality_type); codegen.generator->write_binary_operator(type_comp_addr_1, Variant::OP_EQUAL, p_type_addr, type_string_addr); codegen.generator->write_binary_operator(type_comp_addr_2, Variant::OP_EQUAL, literal_type_addr, type_string_name_addr); codegen.generator->write_binary_operator(type_comp_addr_1, Variant::OP_AND, type_comp_addr_1, type_comp_addr_2); codegen.generator->write_binary_operator(type_equality_addr, Variant::OP_OR, type_equality_addr, type_comp_addr_1); codegen.generator->write_binary_operator(type_comp_addr_1, Variant::OP_EQUAL, p_type_addr, type_string_name_addr); codegen.generator->write_binary_operator(type_comp_addr_2, Variant::OP_EQUAL, literal_type_addr, type_string_addr); codegen.generator->write_binary_operator(type_comp_addr_1, Variant::OP_AND, type_comp_addr_1, type_comp_addr_2); codegen.generator->write_binary_operator(type_equality_addr, Variant::OP_OR, type_equality_addr, type_comp_addr_1); codegen.generator->pop_temporary(); // Remove type_comp_addr_2 from stack. codegen.generator->pop_temporary(); // Remove type_comp_addr_1 from stack. 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(); } // Evaluate expression type. Vector 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); // 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 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 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 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(); } // 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(); } } // 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_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; } ERR_FAIL_V_MSG(p_previous_test, "Reaching the end of pattern compilation without matching a pattern."); } 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(), codegen.script)); } } Error GDScriptCompiler::_parse_block(CodeGen &codegen, const GDScriptParser::SuiteNode *p_block, bool p_add_locals) { Error err = OK; GDScriptCodeGenerator *gen = codegen.generator; codegen.start_block(); if (p_add_locals) { _add_locals_in_block(codegen, p_block); } for (int i = 0; i < p_block->statements.size(); i++) { const GDScriptParser::Node *s = p_block->statements[i]; #ifdef DEBUG_ENABLED // Add a newline before each statement, since the debugger needs those. gen->write_newline(s->start_line); #endif switch (s->type) { case GDScriptParser::Node::MATCH: { const GDScriptParser::MatchNode *match = static_cast(s); 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(), codegen.script)); GDScriptCodeGenerator::Address value_expr = _parse_expression(codegen, err, match->test); if (err) { return err; } // 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 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, err, branch->patterns[k], value, type, pattern_result, k == 0, false); if (err != OK) { return err; } } // Check if pattern did match. gen->write_if(pattern_result); // Remove the result from stack. gen->pop_temporary(); // Parse the branch block. err = _parse_block(codegen, branch->block, false); // Don't add locals again. if (err) { return err; } 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(); } gen->end_match(); } break; case GDScriptParser::Node::IF: { const GDScriptParser::IfNode *if_n = static_cast(s); GDScriptCodeGenerator::Address condition = _parse_expression(codegen, err, if_n->condition); if (err) { return err; } gen->write_if(condition); if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) { codegen.generator->pop_temporary(); } err = _parse_block(codegen, if_n->true_block); if (err) { return err; } if (if_n->false_block) { gen->write_else(); err = _parse_block(codegen, if_n->false_block); if (err) { return err; } } gen->write_endif(); } break; case GDScriptParser::Node::FOR: { const GDScriptParser::ForNode *for_n = static_cast(s); codegen.start_block(); GDScriptCodeGenerator::Address iterator = codegen.add_local(for_n->variable->name, _gdtype_from_datatype(for_n->variable->get_datatype(), codegen.script)); gen->start_for(iterator.type, _gdtype_from_datatype(for_n->list->get_datatype(), codegen.script)); GDScriptCodeGenerator::Address list = _parse_expression(codegen, err, for_n->list); if (err) { return err; } gen->write_for_assignment(iterator, list); if (list.mode == GDScriptCodeGenerator::Address::TEMPORARY) { codegen.generator->pop_temporary(); } gen->write_for(); err = _parse_block(codegen, for_n->loop); if (err) { return err; } gen->write_endfor(); codegen.end_block(); } break; case GDScriptParser::Node::WHILE: { const GDScriptParser::WhileNode *while_n = static_cast(s); gen->start_while_condition(); GDScriptCodeGenerator::Address condition = _parse_expression(codegen, err, while_n->condition); if (err) { return err; } gen->write_while(condition); if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) { codegen.generator->pop_temporary(); } err = _parse_block(codegen, while_n->loop); if (err) { return err; } gen->write_endwhile(); } break; case GDScriptParser::Node::BREAK: { gen->write_break(); } break; case GDScriptParser::Node::CONTINUE: { const GDScriptParser::ContinueNode *cont = static_cast(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(s); GDScriptCodeGenerator::Address return_value; if (return_n->return_value != nullptr) { return_value = _parse_expression(codegen, err, return_n->return_value); if (err) { return err; } } gen->write_return(return_value); if (return_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) { codegen.generator->pop_temporary(); } } break; case GDScriptParser::Node::ASSERT: { #ifdef DEBUG_ENABLED const GDScriptParser::AssertNode *as = static_cast(s); GDScriptCodeGenerator::Address condition = _parse_expression(codegen, err, as->condition); if (err) { return err; } GDScriptCodeGenerator::Address message; if (as->message) { message = _parse_expression(codegen, err, as->message); if (err) { return err; } } 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 } break; case GDScriptParser::Node::BREAKPOINT: { #ifdef DEBUG_ENABLED gen->write_breakpoint(); #endif } break; case GDScriptParser::Node::VARIABLE: { const GDScriptParser::VariableNode *lv = static_cast(s); // Should be already in stack when the block began. GDScriptCodeGenerator::Address local = codegen.locals[lv->identifier->name]; GDScriptDataType local_type = _gdtype_from_datatype(lv->get_datatype(), codegen.script); bool initialized = false; if (lv->initializer != nullptr) { // For typed arrays we need to make sure this is already initialized correctly so typed assignment work. if (local_type.has_type && local_type.builtin_type == Variant::ARRAY) { if (local_type.has_container_element_type()) { codegen.generator->write_construct_typed_array(local, local_type.get_container_element_type(), Vector()); } else { codegen.generator->write_construct_array(local, Vector()); } } GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, err, lv->initializer); if (err) { return err; } 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(); } initialized = true; } else if (local_type.has_type) { // Initialize with default for type. if (local_type.has_container_element_type()) { codegen.generator->write_construct_typed_array(local, local_type.get_container_element_type(), Vector()); initialized = true; } else if (local_type.kind == GDScriptDataType::BUILTIN) { codegen.generator->write_construct(local, local_type.builtin_type, Vector()); initialized = true; } // The `else` branch is for objects, in such case we leave it as `null`. } // Assigns a null for the unassigned variables in loops. if (!initialized && p_block->is_loop) { codegen.generator->write_construct(local, Variant::NIL, Vector()); } } break; case GDScriptParser::Node::CONSTANT: { // Local constants. const GDScriptParser::ConstantNode *lc = static_cast(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; default: { // Expression. if (s->is_expression()) { GDScriptCodeGenerator::Address expr = _parse_expression(codegen, err, static_cast(s), true); if (err) { return err; } 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. } } break; } } codegen.end_block(); 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; CodeGen codegen; codegen.generator = memnew(GDScriptByteCodeGenerator); codegen.class_node = p_class; codegen.script = p_script; codegen.function_node = p_func; StringName func_name; bool is_static = false; Variant 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 = ""; } 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; 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->initializer != nullptr, par_type); codegen.parameters[parameter->identifier->name] = GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::FUNCTION_PARAMETER, par_addr, par_type); if (p_func->parameters[i]->initializer != nullptr) { optional_parameters++; } } } // 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; 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; } GDScriptDataType field_type = _gdtype_from_datatype(field->get_datatype(), codegen.script); GDScriptCodeGenerator::Address dst_address(GDScriptCodeGenerator::Address::MEMBER, codegen.script->member_indices[field->identifier->name].index, field_type); 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.has_type && field_type.builtin_type == Variant::ARRAY) { if (field_type.has_container_element_type()) { codegen.generator->write_construct_typed_array(dst_address, field_type.get_container_element_type(), Vector()); } else { codegen.generator->write_construct_array(dst_address, Vector()); } } GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, r_error, field->initializer, false, true); if (r_error) { 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_type.has_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, field_type.get_container_element_type(), Vector()); } else if (field_type.kind == GDScriptDataType::BUILTIN) { codegen.generator->write_construct(dst_address, field_type.builtin_type, Vector()); } // The `else` branch is for objects, in such case we leave it as `null`. } } } // Parse default argument code if applies. 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->initializer); if (r_error) { 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(); } } codegen.generator->end_parameters(); } r_error = _parse_block(codegen, p_func->body); if (r_error) { memdelete(codegen.generator); return nullptr; } } #ifdef DEBUG_ENABLED if (EngineDebugger::is_active()) { String signature; // Path. if (!p_script->get_script_path().is_empty()) { signature += p_script->get_script_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 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 } else { codegen.generator->set_initial_line(0); } GDScriptFunction *gd_function = codegen.generator->write_end(); 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; } 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; } memdelete(codegen.generator); return gd_function; } Error GDScriptCompiler::_parse_setter_getter(GDScript *p_script, const GDScriptParser::ClassNode *p_class, const GDScriptParser::VariableNode *p_variable, bool p_is_setter) { Error err = OK; GDScriptParser::FunctionNode *function; if (p_is_setter) { function = p_variable->setter; } else { function = p_variable->getter; } _parse_function(err, p_script, p_class, function); return err; } Error GDScriptCompiler::_populate_class_members(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) { if (parsed_classes.has(p_script)) { return OK; } if (parsing_classes.has(p_script)) { String class_name = p_class->identifier ? String(p_class->identifier->name) : p_class->fqcn; _set_error(vformat(R"(Cyclic class reference for "%s".)", class_name), p_class); return ERR_PARSE_ERROR; } parsing_classes.insert(p_script); p_script->clearing = true; #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(); p_script->base = Ref(); p_script->_base = nullptr; p_script->members.clear(); // This makes possible to clear script constants and member_functions without heap-use-after-free errors. HashMap constants; for (const KeyValue &E : p_script->constants) { constants.insert(E.key, E.value); } p_script->constants.clear(); constants.clear(); HashMap member_functions; for (const KeyValue &E : p_script->member_functions) { member_functions.insert(E.key, E.value); } p_script->member_functions.clear(); for (const KeyValue &E : member_functions) { memdelete(E.value); } member_functions.clear(); if (p_script->implicit_initializer) { memdelete(p_script->implicit_initializer); } if (p_script->implicit_ready) { memdelete(p_script->implicit_ready); } p_script->member_functions.clear(); p_script->member_indices.clear(); p_script->member_info.clear(); p_script->_signals.clear(); p_script->initializer = nullptr; p_script->implicit_initializer = nullptr; p_script->implicit_ready = nullptr; p_script->clearing = false; p_script->tool = parser->is_tool(); 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; } } GDScriptDataType base_type = _gdtype_from_datatype(p_class->base_type, p_script); // Inheritance switch (base_type.kind) { case GDScriptDataType::NATIVE: { int native_idx = GDScriptLanguage::get_singleton()->get_global_map()[base_type.native_type]; p_script->native = GDScriptLanguage::get_singleton()->get_global_array()[native_idx]; ERR_FAIL_COND_V(p_script->native.is_null(), ERR_BUG); } break; case GDScriptDataType::GDSCRIPT: { Ref base = Ref(base_type.script_type); if (base.is_null()) { return ERR_COMPILATION_FAILED; } if (main_script->has_class(base.ptr())) { Error err = _populate_class_members(base.ptr(), p_class->base_type.class_type, p_keep_state); if (err) { return err; } } else if (!base->is_valid()) { Error err = OK; Ref base_root = GDScriptCache::get_full_script(base->path, err, p_script->path); if (err) { _set_error(vformat(R"(Could not compile base class "%s" from "%s": %s)", base->fully_qualified_name, base->path, error_names[err]), nullptr); return err; } if (base_root.is_valid()) { base = Ref(base_root->find_class(base->fully_qualified_name)); } if (base.is_null()) { _set_error(vformat(R"(Could not find class "%s" in "%s".)", base->fully_qualified_name, base->path), nullptr); return ERR_COMPILATION_FAILED; } ERR_FAIL_COND_V(!base->is_valid() && !base->reloading, ERR_BUG); } p_script->base = base; p_script->_base = base.ptr(); p_script->member_indices = base->member_indices; p_script->native = base->native; } break; default: { _set_error("Parser bug: invalid inheritance.", nullptr); return ERR_BUG; } break; } 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(); 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 p_script->member_info[name] = prop_info; p_script->member_indices[name] = minfo; p_script->members.insert(name); #ifdef TOOLS_ENABLED if (variable->initializer != nullptr && variable->initializer->is_constant) { p_script->member_default_values[name] = variable->initializer->reduced_value; GDScriptCompiler::convert_to_initializer_type(p_script->member_default_values[name], variable); } else { p_script->member_default_values.erase(name); } p_script->member_lines[name] = variable->start_line; #endif } break; 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; 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; case GDScriptParser::ClassNode::Member::SIGNAL: { const GDScriptParser::SignalNode *signal = member.signal; StringName name = signal->identifier->name; Vector 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 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; StringName name = enum_n->identifier->name; p_script->constants.insert(name, enum_n->dictionary); #ifdef TOOLS_ENABLED p_script->member_lines[name] = enum_n->start_line; p_script->doc_enums[name] = DocData::EnumDoc(); p_script->doc_enums[name].name = name; p_script->doc_enums[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[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); // Populate 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 &subclass = p_script->subclasses[name]; GDScript *subclass_ptr = subclass.ptr(); // Subclass might still be parsing, just skip it if (!parsing_classes.has(subclass_ptr)) { Error err = _populate_class_members(subclass_ptr, inner_class, p_keep_state); if (err) { return err; } } #ifdef TOOLS_ENABLED p_script->member_lines[name] = inner_class->start_line; #endif p_script->constants.insert(name, subclass); //once parsed, goes to the list of constants } return OK; } Error GDScriptCompiler::_compile_class(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) { // Compile member functions, getters, and setters. for (int i = 0; i < p_class->members.size(); i++) { const GDScriptParser::ClassNode::Member &member = p_class->members[i]; if (member.type == member.FUNCTION) { const GDScriptParser::FunctionNode *function = member.function; Error err = OK; _parse_function(err, p_script, p_class, function); 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; } } } } } { // Create an implicit constructor in any case. Error err = OK; _parse_function(err, p_script, p_class, nullptr); if (err) { return err; } } 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::Element *E = p_script->instances.front(); E;) { RBSet::Element *N = E->next(); ScriptInstance *si = E->get()->get_script_instance(); if (si->is_placeholder()) { #ifdef TOOLS_ENABLED PlaceHolderScriptInstance *psi = static_cast(si); if (p_script->is_tool()) { //re-create as an instance p_script->placeholders.erase(psi); //remove placeholder GDScriptInstance *instance = memnew(GDScriptInstance); instance->base_ref_counted = Object::cast_to(E->get()); instance->members.resize(p_script->member_indices.size()); instance->script = Ref(p_script); instance->owner = E->get(); //needed for hot reloading for (const KeyValue &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; p_script->initializer->call(instance, nullptr, 0, ce); if (ce.error != Callable::CallError::CALL_OK) { //well, tough luck, not gonna do anything here } } #endif } else { GDScriptInstance *gi = static_cast(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 = _compile_class(subclass, inner_class, p_keep_state); if (err) { return err; } } p_script->_init_rpc_methods_properties(); p_script->valid = true; return OK; } void GDScriptCompiler::convert_to_initializer_type(Variant &p_variant, const GDScriptParser::VariableNode *p_node) { // Set p_variant to the value of p_node's initializer, with the type of p_node's variable. GDScriptParser::DataType member_t = p_node->datatype; GDScriptParser::DataType init_t = p_node->initializer->datatype; if (member_t.is_hard_type() && init_t.is_hard_type() && member_t.kind == GDScriptParser::DataType::BUILTIN && init_t.kind == GDScriptParser::DataType::BUILTIN) { if (Variant::can_convert_strict(init_t.builtin_type, member_t.builtin_type)) { Variant *v = &p_node->initializer->reduced_value; Callable::CallError ce; Variant::construct(member_t.builtin_type, p_variant, const_cast(&v), 1, ce); } } } void GDScriptCompiler::make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) { p_script->fully_qualified_name = p_class->fqcn; p_script->name = p_class->identifier ? p_class->identifier->name : ""; HashMap> 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 subclass; if (old_subclasses.has(name)) { subclass = old_subclasses[name]; } else { subclass = GDScriptLanguage::get_singleton()->get_orphan_subclass(inner_class->fqcn); } if (subclass.is_null()) { subclass.instantiate(); } subclass->_owner = p_script; subclass->path = p_script->path; p_script->subclasses.insert(name, subclass); make_scripts(subclass.ptr(), inner_class, p_keep_state); } } 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(); source = p_script->get_path(); // Create scripts for subclasses beforehand so they can be referenced make_scripts(p_script, root, p_keep_state); main_script->_owner = nullptr; Error err = _populate_class_members(main_script, parser->get_tree(), p_keep_state); if (err) { return err; } err = _compile_class(main_script, root, p_keep_state); if (err) { return err; } #ifdef TOOLS_ENABLED p_script->_update_doc(); #endif return GDScriptCache::finish_compiling(main_script->get_path()); } String GDScriptCompiler::get_error() const { return error; } int GDScriptCompiler::get_error_line() const { return err_line; } int GDScriptCompiler::get_error_column() const { return err_column; } GDScriptCompiler::GDScriptCompiler() { }