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gdscript_analyzer.cpp
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/*************************************************************************/
/* gdscript_analyzer.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gdscript_analyzer.h"
#include "core/config/engine.h"
#include "core/config/project_settings.h"
#include "core/io/file_access.h"
#include "core/io/resource_loader.h"
#include "core/object/class_db.h"
#include "core/object/script_language.h"
#include "core/templates/hash_map.h"
#include "gdscript.h"
#include "gdscript_utility_functions.h"
static MethodInfo info_from_utility_func(const StringName &p_function) {
ERR_FAIL_COND_V(!Variant::has_utility_function(p_function), MethodInfo());
MethodInfo info(p_function);
if (Variant::has_utility_function_return_value(p_function)) {
info.return_val.type = Variant::get_utility_function_return_type(p_function);
if (info.return_val.type == Variant::NIL) {
info.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
}
}
if (Variant::is_utility_function_vararg(p_function)) {
info.flags |= METHOD_FLAG_VARARG;
} else {
for (int i = 0; i < Variant::get_utility_function_argument_count(p_function); i++) {
PropertyInfo pi;
#ifdef DEBUG_METHODS_ENABLED
pi.name = Variant::get_utility_function_argument_name(p_function, i);
#else
pi.name = "arg" + itos(i + 1);
#endif
pi.type = Variant::get_utility_function_argument_type(p_function, i);
if (pi.type == Variant::NIL) {
pi.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
}
info.arguments.push_back(pi);
}
}
return info;
}
static GDScriptParser::DataType make_callable_type(const MethodInfo &p_info) {
GDScriptParser::DataType type;
type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
type.kind = GDScriptParser::DataType::BUILTIN;
type.builtin_type = Variant::CALLABLE;
type.is_constant = true;
type.method_info = p_info;
return type;
}
static GDScriptParser::DataType make_signal_type(const MethodInfo &p_info) {
GDScriptParser::DataType type;
type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
type.kind = GDScriptParser::DataType::BUILTIN;
type.builtin_type = Variant::SIGNAL;
type.is_constant = true;
type.method_info = p_info;
return type;
}
static GDScriptParser::DataType make_native_meta_type(const StringName &p_class_name) {
GDScriptParser::DataType type;
type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
type.kind = GDScriptParser::DataType::NATIVE;
type.builtin_type = Variant::OBJECT;
type.is_constant = true;
type.native_type = p_class_name;
type.is_meta_type = true;
return type;
}
static GDScriptParser::DataType make_native_enum_type(const StringName &p_native_class, const StringName &p_enum_name) {
GDScriptParser::DataType type;
type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
type.kind = GDScriptParser::DataType::ENUM;
type.builtin_type = Variant::INT;
type.is_constant = true;
type.is_meta_type = true;
List<StringName> enum_values;
ClassDB::get_enum_constants(p_native_class, p_enum_name, &enum_values);
for (const StringName &E : enum_values) {
type.enum_values[E] = ClassDB::get_integer_constant(p_native_class, E);
}
return type;
}
static GDScriptParser::DataType make_builtin_meta_type(Variant::Type p_type) {
GDScriptParser::DataType type;
type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
type.kind = GDScriptParser::DataType::BUILTIN;
type.builtin_type = p_type;
type.is_constant = true;
type.is_meta_type = true;
return type;
}
bool GDScriptAnalyzer::has_member_name_conflict_in_script_class(const StringName &p_member_name, const GDScriptParser::ClassNode *p_class) {
if (p_class->members_indices.has(p_member_name)) {
int index = p_class->members_indices[p_member_name];
const GDScriptParser::ClassNode::Member *member = &p_class->members[index];
if (member->type == GDScriptParser::ClassNode::Member::VARIABLE ||
member->type == GDScriptParser::ClassNode::Member::CONSTANT ||
member->type == GDScriptParser::ClassNode::Member::ENUM ||
member->type == GDScriptParser::ClassNode::Member::ENUM_VALUE ||
member->type == GDScriptParser::ClassNode::Member::CLASS ||
member->type == GDScriptParser::ClassNode::Member::SIGNAL) {
return true;
}
}
return false;
}
bool GDScriptAnalyzer::has_member_name_conflict_in_native_type(const StringName &p_member_name, const StringName &p_native_type_string) {
if (ClassDB::has_signal(p_native_type_string, p_member_name)) {
return true;
}
if (ClassDB::has_property(p_native_type_string, p_member_name)) {
return true;
}
if (ClassDB::has_integer_constant(p_native_type_string, p_member_name)) {
return true;
}
return false;
}
Error GDScriptAnalyzer::check_native_member_name_conflict(const StringName &p_member_name, const GDScriptParser::Node *p_member_node, const StringName &p_native_type_string) {
if (has_member_name_conflict_in_native_type(p_member_name, p_native_type_string)) {
push_error(vformat(R"(Member "%s" redefined (original in native class '%s'))", p_member_name, p_native_type_string), p_member_node);
return ERR_PARSE_ERROR;
}
if (class_exists(p_member_name)) {
push_error(vformat(R"(The member "%s" shadows a native class.)", p_member_name), p_member_node);
return ERR_PARSE_ERROR;
}
if (GDScriptParser::get_builtin_type(p_member_name) != Variant::VARIANT_MAX) {
push_error(vformat(R"(The member "%s" cannot have the same name as a builtin type.)", p_member_name), p_member_node);
return ERR_PARSE_ERROR;
}
return OK;
}
Error GDScriptAnalyzer::check_class_member_name_conflict(const GDScriptParser::ClassNode *p_class_node, const StringName &p_member_name, const GDScriptParser::Node *p_member_node) {
const GDScriptParser::DataType *current_data_type = &p_class_node->base_type;
while (current_data_type && current_data_type->kind == GDScriptParser::DataType::Kind::CLASS) {
GDScriptParser::ClassNode *current_class_node = current_data_type->class_type;
if (has_member_name_conflict_in_script_class(p_member_name, current_class_node)) {
push_error(vformat(R"(The member "%s" already exists in a parent class.)", p_member_name),
p_member_node);
return ERR_PARSE_ERROR;
}
current_data_type = ¤t_class_node->base_type;
}
if (current_data_type && current_data_type->kind == GDScriptParser::DataType::Kind::NATIVE) {
if (current_data_type->native_type != StringName()) {
return check_native_member_name_conflict(
p_member_name,
p_member_node,
current_data_type->native_type);
}
}
return OK;
}
Error GDScriptAnalyzer::resolve_inheritance(GDScriptParser::ClassNode *p_class, bool p_recursive) {
if (p_class->base_type.is_set()) {
// Already resolved
return OK;
}
if (p_class == parser->head) {
if (p_class->identifier) {
p_class->fqcn = p_class->identifier->name;
} else {
p_class->fqcn = parser->script_path;
}
} else {
p_class->fqcn = p_class->outer->fqcn + "::" + String(p_class->identifier->name);
}
if (p_class->identifier) {
StringName class_name = p_class->identifier->name;
if (class_exists(class_name)) {
push_error(vformat(R"(Class "%s" hides a native class.)", class_name), p_class->identifier);
} else if (ScriptServer::is_global_class(class_name) && (ScriptServer::get_global_class_path(class_name) != parser->script_path || p_class != parser->head)) {
push_error(vformat(R"(Class "%s" hides a global script class.)", class_name), p_class->identifier);
} else if (ProjectSettings::get_singleton()->has_autoload(class_name) && ProjectSettings::get_singleton()->get_autoload(class_name).is_singleton) {
push_error(vformat(R"(Class "%s" hides an autoload singleton.)", class_name), p_class->identifier);
}
}
GDScriptParser::DataType result;
// Set datatype for class.
GDScriptParser::DataType class_type;
class_type.is_constant = true;
class_type.is_meta_type = true;
class_type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
class_type.kind = GDScriptParser::DataType::CLASS;
class_type.class_type = p_class;
class_type.script_path = parser->script_path;
class_type.builtin_type = Variant::OBJECT;
p_class->set_datatype(class_type);
if (!p_class->extends_used) {
result.type_source = GDScriptParser::DataType::ANNOTATED_INFERRED;
result.kind = GDScriptParser::DataType::NATIVE;
result.native_type = SNAME("RefCounted");
} else {
result.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
GDScriptParser::DataType base;
int extends_index = 0;
if (!p_class->extends_path.is_empty()) {
if (p_class->extends_path.is_relative_path()) {
p_class->extends_path = class_type.script_path.get_base_dir().plus_file(p_class->extends_path).simplify_path();
}
Ref<GDScriptParserRef> parser = get_parser_for(p_class->extends_path);
if (parser.is_null()) {
push_error(vformat(R"(Could not resolve super class path "%s".)", p_class->extends_path), p_class);
return ERR_PARSE_ERROR;
}
Error err = parser->raise_status(GDScriptParserRef::INTERFACE_SOLVED);
if (err != OK) {
push_error(vformat(R"(Could not resolve super class inheritance from "%s".)", p_class->extends_path), p_class);
return err;
}
base = parser->get_parser()->head->get_datatype();
} else {
if (p_class->extends.is_empty()) {
push_error("Could not resolve an empty super class path.", p_class);
return ERR_PARSE_ERROR;
}
const StringName &name = p_class->extends[extends_index++];
base.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
if (ScriptServer::is_global_class(name)) {
String base_path = ScriptServer::get_global_class_path(name);
if (base_path == parser->script_path) {
base = parser->head->get_datatype();
} else {
Ref<GDScriptParserRef> parser = get_parser_for(base_path);
if (parser.is_null()) {
push_error(vformat(R"(Could not resolve super class "%s".)", name), p_class);
return ERR_PARSE_ERROR;
}
Error err = parser->raise_status(GDScriptParserRef::INTERFACE_SOLVED);
if (err != OK) {
push_error(vformat(R"(Could not resolve super class inheritance from "%s".)", name), p_class);
return err;
}
base = parser->get_parser()->head->get_datatype();
}
} else if (ProjectSettings::get_singleton()->has_autoload(name) && ProjectSettings::get_singleton()->get_autoload(name).is_singleton) {
const ProjectSettings::AutoloadInfo &info = ProjectSettings::get_singleton()->get_autoload(name);
if (info.path.get_extension().to_lower() != ".gd") {
push_error(vformat(R"(Singleton %s is not a GDScript.)", info.name), p_class);
return ERR_PARSE_ERROR;
}
Ref<GDScriptParserRef> parser = get_parser_for(info.path);
if (parser.is_null()) {
push_error(vformat(R"(Could not parse singleton from "%s".)", info.path), p_class);
return ERR_PARSE_ERROR;
}
Error err = parser->raise_status(GDScriptParserRef::INTERFACE_SOLVED);
if (err != OK) {
push_error(vformat(R"(Could not resolve super class inheritance from "%s".)", name), p_class);
return err;
}
} else if (class_exists(name) && ClassDB::can_instantiate(name)) {
base.kind = GDScriptParser::DataType::NATIVE;
base.native_type = name;
} else {
// Look for other classes in script.
GDScriptParser::ClassNode *look_class = p_class;
bool found = false;
while (look_class != nullptr) {
if (look_class->identifier && look_class->identifier->name == name) {
if (!look_class->get_datatype().is_set()) {
Error err = resolve_inheritance(look_class, false);
if (err) {
return err;
}
}
base = look_class->get_datatype();
found = true;
break;
}
if (look_class->members_indices.has(name) && look_class->get_member(name).type == GDScriptParser::ClassNode::Member::CLASS) {
GDScriptParser::ClassNode::Member member = look_class->get_member(name);
if (!member.m_class->get_datatype().is_set()) {
Error err = resolve_inheritance(member.m_class, false);
if (err) {
return err;
}
}
base = member.m_class->get_datatype();
found = true;
break;
}
look_class = look_class->outer;
}
if (!found) {
push_error(vformat(R"(Could not find base class "%s".)", name), p_class);
return ERR_PARSE_ERROR;
}
}
}
for (int index = extends_index; index < p_class->extends.size(); index++) {
if (base.kind != GDScriptParser::DataType::CLASS) {
push_error(R"(Super type "%s" is not a GDScript. Cannot get nested types.)", p_class);
return ERR_PARSE_ERROR;
}
// TODO: Extends could use identifier nodes. That way errors can be pointed out properly and it can be used here.
GDScriptParser::IdentifierNode *id = parser->alloc_node<GDScriptParser::IdentifierNode>();
id->name = p_class->extends[index];
reduce_identifier_from_base(id, &base);
GDScriptParser::DataType id_type = id->get_datatype();
if (!id_type.is_set()) {
push_error(vformat(R"(Could not find type "%s" under base "%s".)", id->name, base.to_string()), p_class);
}
base = id_type;
}
result = base;
}
if (!result.is_set()) {
// TODO: More specific error messages.
push_error(vformat(R"(Could not resolve inheritance for class "%s".)", p_class->identifier == nullptr ? "<main>" : p_class->identifier->name), p_class);
return ERR_PARSE_ERROR;
}
// Check for cyclic inheritance.
const GDScriptParser::ClassNode *base_class = result.class_type;
while (base_class) {
if (base_class->fqcn == p_class->fqcn) {
push_error("Cyclic inheritance.", p_class);
return ERR_PARSE_ERROR;
}
base_class = base_class->base_type.class_type;
}
p_class->base_type = result;
class_type.native_type = result.native_type;
p_class->set_datatype(class_type);
if (p_recursive) {
for (int i = 0; i < p_class->members.size(); i++) {
if (p_class->members[i].type == GDScriptParser::ClassNode::Member::CLASS) {
Error err = resolve_inheritance(p_class->members[i].m_class, true);
if (err) {
return err;
}
}
}
}
return OK;
}
GDScriptParser::DataType GDScriptAnalyzer::resolve_datatype(GDScriptParser::TypeNode *p_type) {
GDScriptParser::DataType result;
if (p_type == nullptr) {
result.kind = GDScriptParser::DataType::VARIANT;
return result;
}
result.type_source = result.ANNOTATED_EXPLICIT;
result.builtin_type = Variant::OBJECT;
if (p_type->type_chain.is_empty()) {
// void.
result.kind = GDScriptParser::DataType::BUILTIN;
result.builtin_type = Variant::NIL;
p_type->set_datatype(result);
return result;
}
StringName first = p_type->type_chain[0]->name;
if (first == SNAME("Variant")) {
result.kind = GDScriptParser::DataType::VARIANT;
if (p_type->type_chain.size() > 1) {
push_error(R"("Variant" type don't contain nested types.)", p_type->type_chain[1]);
return GDScriptParser::DataType();
}
return result;
}
if (first == SNAME("Object")) {
result.kind = GDScriptParser::DataType::NATIVE;
result.native_type = SNAME("Object");
if (p_type->type_chain.size() > 1) {
push_error(R"("Object" type don't contain nested types.)", p_type->type_chain[1]);
return GDScriptParser::DataType();
}
return result;
}
if (GDScriptParser::get_builtin_type(first) < Variant::VARIANT_MAX) {
// Built-in types.
if (p_type->type_chain.size() > 1) {
push_error(R"(Built-in types don't contain nested types.)", p_type->type_chain[1]);
return GDScriptParser::DataType();
}
result.kind = GDScriptParser::DataType::BUILTIN;
result.builtin_type = GDScriptParser::get_builtin_type(first);
if (result.builtin_type == Variant::ARRAY) {
GDScriptParser::DataType container_type = resolve_datatype(p_type->container_type);
if (container_type.kind != GDScriptParser::DataType::VARIANT) {
container_type.is_meta_type = false;
container_type.is_constant = false;
result.set_container_element_type(container_type);
}
}
} else if (class_exists(first)) {
// Native engine classes.
result.kind = GDScriptParser::DataType::NATIVE;
result.native_type = first;
} else if (ScriptServer::is_global_class(first)) {
if (parser->script_path == ScriptServer::get_global_class_path(first)) {
result = parser->head->get_datatype();
} else {
Ref<GDScriptParserRef> ref = get_parser_for(ScriptServer::get_global_class_path(first));
if (!ref.is_valid() || ref->raise_status(GDScriptParserRef::INTERFACE_SOLVED) != OK) {
push_error(vformat(R"(Could not parse global class "%s" from "%s".)", first, ScriptServer::get_global_class_path(first)), p_type);
return GDScriptParser::DataType();
}
result = ref->get_parser()->head->get_datatype();
}
} else if (ProjectSettings::get_singleton()->has_autoload(first) && ProjectSettings::get_singleton()->get_autoload(first).is_singleton) {
const ProjectSettings::AutoloadInfo &autoload = ProjectSettings::get_singleton()->get_autoload(first);
Ref<GDScriptParserRef> ref = get_parser_for(autoload.path);
if (ref->raise_status(GDScriptParserRef::INTERFACE_SOLVED) != OK) {
push_error(vformat(R"(Could not parse singleton "%s" from "%s".)", first, autoload.path), p_type);
return GDScriptParser::DataType();
}
result = ref->get_parser()->head->get_datatype();
} else if (ClassDB::has_enum(parser->current_class->base_type.native_type, first)) {
// Native enum in current class.
result = make_native_enum_type(parser->current_class->base_type.native_type, first);
} else {
// Classes in current scope.
GDScriptParser::ClassNode *script_class = parser->current_class;
bool found = false;
while (!found && script_class != nullptr) {
if (script_class->identifier && script_class->identifier->name == first) {
result = script_class->get_datatype();
found = true;
break;
}
if (script_class->members_indices.has(first)) {
GDScriptParser::ClassNode::Member member = script_class->members[script_class->members_indices[first]];
switch (member.type) {
case GDScriptParser::ClassNode::Member::CLASS:
result = member.m_class->get_datatype();
found = true;
break;
case GDScriptParser::ClassNode::Member::ENUM:
result = member.m_enum->get_datatype();
found = true;
break;
case GDScriptParser::ClassNode::Member::CONSTANT:
if (member.constant->get_datatype().is_meta_type) {
result = member.constant->get_datatype();
result.is_meta_type = false;
found = true;
break;
} else if (Ref<Script>(member.constant->initializer->reduced_value).is_valid()) {
Ref<GDScript> gdscript = member.constant->initializer->reduced_value;
if (gdscript.is_valid()) {
Ref<GDScriptParserRef> ref = get_parser_for(gdscript->get_path());
if (ref->raise_status(GDScriptParserRef::INTERFACE_SOLVED) != OK) {
push_error(vformat(R"(Could not parse script from "%s".)", gdscript->get_path()), p_type);
return GDScriptParser::DataType();
}
result = ref->get_parser()->head->get_datatype();
result.is_meta_type = false;
} else {
Ref<GDScript> script = member.constant->initializer->reduced_value;
result.kind = GDScriptParser::DataType::SCRIPT;
result.builtin_type = Variant::OBJECT;
result.script_type = script;
result.script_path = script->get_path();
result.native_type = script->get_instance_base_type();
}
break;
}
[[fallthrough]];
default:
push_error(vformat(R"("%s" is a %s but does not contain a type.)", first, member.get_type_name()), p_type);
return GDScriptParser::DataType();
}
}
script_class = script_class->outer;
}
}
if (!result.is_set()) {
push_error(vformat(R"("%s" was not found in the current scope.)", first), p_type);
result.kind = GDScriptParser::DataType::VARIANT; // Leave Variant anyway so future type check don't use an unresolved type.
return result;
}
if (p_type->type_chain.size() > 1) {
if (result.kind == GDScriptParser::DataType::CLASS) {
for (int i = 1; i < p_type->type_chain.size(); i++) {
GDScriptParser::DataType base = result;
reduce_identifier_from_base(p_type->type_chain[i], &base);
result = p_type->type_chain[i]->get_datatype();
if (!result.is_set()) {
push_error(vformat(R"(Could not find type "%s" under base "%s".)", p_type->type_chain[i]->name, base.to_string()), p_type->type_chain[1]);
result.kind = GDScriptParser::DataType::VARIANT; // Leave Variant anyway so future type check don't use an unresolved type.
return result;
} else if (!result.is_meta_type) {
push_error(vformat(R"(Member "%s" under base "%s" is not a valid type.)", p_type->type_chain[i]->name, base.to_string()), p_type->type_chain[1]);
result.kind = GDScriptParser::DataType::VARIANT; // Leave Variant anyway so future type check don't use an unresolved type.
return result;
}
}
} else if (result.kind == GDScriptParser::DataType::NATIVE) {
// Only enums allowed for native.
if (ClassDB::has_enum(result.native_type, p_type->type_chain[1]->name)) {
if (p_type->type_chain.size() > 2) {
push_error(R"(Enums cannot contain nested types.)", p_type->type_chain[2]);
} else {
result = make_native_enum_type(result.native_type, p_type->type_chain[1]->name);
}
}
} else {
push_error(vformat(R"(Could not find nested type "%s" under base "%s".)", p_type->type_chain[1]->name, result.to_string()), p_type->type_chain[1]);
result.kind = GDScriptParser::DataType::VARIANT; // Leave Variant anyway so future type check don't use an unresolved type.
return result;
}
}
if (result.builtin_type != Variant::ARRAY && p_type->container_type != nullptr) {
push_error("Only arrays can specify the collection element type.", p_type);
}
p_type->set_datatype(result);
return result;
}
void GDScriptAnalyzer::resolve_class_interface(GDScriptParser::ClassNode *p_class) {
if (p_class->resolved_interface) {
return;
}
p_class->resolved_interface = true;
GDScriptParser::ClassNode *previous_class = parser->current_class;
parser->current_class = p_class;
for (int i = 0; i < p_class->members.size(); i++) {
GDScriptParser::ClassNode::Member member = p_class->members[i];
switch (member.type) {
case GDScriptParser::ClassNode::Member::VARIABLE: {
check_class_member_name_conflict(p_class, member.variable->identifier->name, member.variable);
GDScriptParser::DataType datatype;
datatype.kind = GDScriptParser::DataType::VARIANT;
datatype.type_source = GDScriptParser::DataType::UNDETECTED;
GDScriptParser::DataType specified_type;
if (member.variable->datatype_specifier != nullptr) {
specified_type = resolve_datatype(member.variable->datatype_specifier);
specified_type.is_meta_type = false;
}
if (member.variable->initializer != nullptr) {
member.variable->set_datatype(datatype); // Allow recursive usage.
reduce_expression(member.variable->initializer);
if ((member.variable->infer_datatype || (member.variable->datatype_specifier != nullptr && specified_type.has_container_element_type())) && member.variable->initializer->type == GDScriptParser::Node::ARRAY) {
// Typed array.
GDScriptParser::ArrayNode *array = static_cast<GDScriptParser::ArrayNode *>(member.variable->initializer);
// Can only infer typed array if it has elements.
if ((member.variable->infer_datatype && array->elements.size() > 0) || member.variable->datatype_specifier != nullptr) {
update_array_literal_element_type(specified_type, array);
}
}
datatype = member.variable->initializer->get_datatype();
if (datatype.type_source != GDScriptParser::DataType::UNDETECTED) {
datatype.type_source = GDScriptParser::DataType::INFERRED;
}
}
// Check if initializer is an unset identifier (ie: a variable within scope, but declared below)
if (member.variable->initializer && !member.variable->initializer->get_datatype().is_set()) {
if (member.variable->initializer->type == GDScriptParser::Node::IDENTIFIER) {
GDScriptParser::IdentifierNode *initializer_identifier = static_cast<GDScriptParser::IdentifierNode *>(member.variable->initializer);
push_error(vformat(R"(Identifier "%s" must be declared above current variable.)", initializer_identifier->name), member.variable->initializer);
} else {
ERR_PRINT("Parser bug (please report): tried to assign unset node without an identifier.");
}
}
if (member.variable->datatype_specifier != nullptr) {
datatype = specified_type;
if (member.variable->initializer != nullptr) {
if (!is_type_compatible(datatype, member.variable->initializer->get_datatype(), true, member.variable->initializer)) {
// Try reverse test since it can be a masked subtype.
if (!is_type_compatible(member.variable->initializer->get_datatype(), datatype, true, member.variable->initializer)) {
push_error(vformat(R"(Value of type "%s" cannot be assigned to a variable of type "%s".)", member.variable->initializer->get_datatype().to_string(), datatype.to_string()), member.variable->initializer);
} else {
// TODO: Add warning.
mark_node_unsafe(member.variable->initializer);
member.variable->use_conversion_assign = true;
}
} else if (datatype.builtin_type == Variant::INT && member.variable->initializer->get_datatype().builtin_type == Variant::FLOAT) {
#ifdef DEBUG_ENABLED
parser->push_warning(member.variable->initializer, GDScriptWarning::NARROWING_CONVERSION);
#endif
}
if (member.variable->initializer->get_datatype().is_variant()) {
// TODO: Warn unsafe assign.
mark_node_unsafe(member.variable->initializer);
member.variable->use_conversion_assign = true;
}
}
} else if (member.variable->infer_datatype) {
if (member.variable->initializer == nullptr) {
push_error(vformat(R"(Cannot infer the type of "%s" variable because there's no default value.)", member.variable->identifier->name), member.variable->identifier);
} else if (!datatype.is_set() || datatype.has_no_type()) {
push_error(vformat(R"(Cannot infer the type of "%s" variable because the initial value doesn't have a set type.)", member.variable->identifier->name), member.variable->initializer);
} else if (datatype.is_variant()) {
push_error(vformat(R"(Cannot infer the type of "%s" variable because the initial value is Variant. Use explicit "Variant" type if this is intended.)", member.variable->identifier->name), member.variable->initializer);
} else if (datatype.builtin_type == Variant::NIL) {
push_error(vformat(R"(Cannot infer the type of "%s" variable because the initial value is "null".)", member.variable->identifier->name), member.variable->initializer);
}
datatype.type_source = GDScriptParser::DataType::ANNOTATED_INFERRED;
}
datatype.is_constant = false;
member.variable->set_datatype(datatype);
// Apply annotations.
for (GDScriptParser::AnnotationNode *&E : member.variable->annotations) {
E->apply(parser, member.variable);
}
} break;
case GDScriptParser::ClassNode::Member::CONSTANT: {
check_class_member_name_conflict(p_class, member.constant->identifier->name, member.constant);
reduce_expression(member.constant->initializer);
GDScriptParser::DataType specified_type;
if (member.constant->datatype_specifier != nullptr) {
specified_type = resolve_datatype(member.constant->datatype_specifier);
specified_type.is_meta_type = false;
}
GDScriptParser::DataType datatype;
if (member.constant->initializer) {
datatype = member.constant->initializer->get_datatype();
if (member.constant->initializer->type == GDScriptParser::Node::ARRAY) {
GDScriptParser::ArrayNode *array = static_cast<GDScriptParser::ArrayNode *>(member.constant->initializer);
const_fold_array(array);
// Can only infer typed array if it has elements.
if (array->elements.size() > 0 || (member.constant->datatype_specifier != nullptr && specified_type.has_container_element_type())) {
update_array_literal_element_type(specified_type, array);
}
} else if (member.constant->initializer->type == GDScriptParser::Node::DICTIONARY) {
const_fold_dictionary(static_cast<GDScriptParser::DictionaryNode *>(member.constant->initializer));
}
if (!member.constant->initializer->is_constant) {
push_error(R"(Initializer for a constant must be a constant expression.)", member.constant->initializer);
}
if (member.constant->datatype_specifier != nullptr) {
datatype = specified_type;
if (!is_type_compatible(datatype, member.constant->initializer->get_datatype(), true)) {
push_error(vformat(R"(Value of type "%s" cannot be initialized to constant of type "%s".)", member.constant->initializer->get_datatype().to_string(), datatype.to_string()), member.constant->initializer);
} else if (datatype.builtin_type == Variant::INT && member.constant->initializer->get_datatype().builtin_type == Variant::FLOAT) {
#ifdef DEBUG_ENABLED
parser->push_warning(member.constant->initializer, GDScriptWarning::NARROWING_CONVERSION);
#endif
}
}
}
datatype.is_constant = true;
member.constant->set_datatype(datatype);
// Apply annotations.
for (GDScriptParser::AnnotationNode *&E : member.constant->annotations) {
E->apply(parser, member.constant);
}
} break;
case GDScriptParser::ClassNode::Member::SIGNAL: {
check_class_member_name_conflict(p_class, member.signal->identifier->name, member.signal);
for (int j = 0; j < member.signal->parameters.size(); j++) {
GDScriptParser::DataType signal_type = resolve_datatype(member.signal->parameters[j]->datatype_specifier);
signal_type.is_meta_type = false;
member.signal->parameters[j]->set_datatype(signal_type);
}
// TODO: Make MethodInfo from signal.
GDScriptParser::DataType signal_type;
signal_type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
signal_type.kind = GDScriptParser::DataType::BUILTIN;
signal_type.builtin_type = Variant::SIGNAL;
member.signal->set_datatype(signal_type);
// Apply annotations.
for (GDScriptParser::AnnotationNode *&E : member.signal->annotations) {
E->apply(parser, member.signal);
}
} break;
case GDScriptParser::ClassNode::Member::ENUM: {
check_class_member_name_conflict(p_class, member.m_enum->identifier->name, member.m_enum);
GDScriptParser::DataType enum_type;
enum_type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
enum_type.kind = GDScriptParser::DataType::ENUM;
enum_type.builtin_type = Variant::DICTIONARY;
enum_type.enum_type = member.m_enum->identifier->name;
enum_type.native_type = p_class->fqcn + "." + member.m_enum->identifier->name;
enum_type.is_meta_type = true;
enum_type.is_constant = true;
// Enums can't be nested, so we can safely override this.
current_enum = member.m_enum;
for (int j = 0; j < member.m_enum->values.size(); j++) {
GDScriptParser::EnumNode::Value &element = member.m_enum->values.write[j];
if (element.custom_value) {
reduce_expression(element.custom_value);
if (!element.custom_value->is_constant) {
push_error(R"(Enum values must be constant.)", element.custom_value);
} else if (element.custom_value->reduced_value.get_type() != Variant::INT) {
push_error(R"(Enum values must be integers.)", element.custom_value);
} else {
element.value = element.custom_value->reduced_value;
element.resolved = true;
}
} else {
if (element.index > 0) {
element.value = element.parent_enum->values[element.index - 1].value + 1;
} else {
element.value = 0;
}
element.resolved = true;
}
enum_type.enum_values[element.identifier->name] = element.value;
}
current_enum = nullptr;
member.m_enum->set_datatype(enum_type);
// Apply annotations.
for (GDScriptParser::AnnotationNode *&E : member.m_enum->annotations) {
E->apply(parser, member.m_enum);
}
} break;
case GDScriptParser::ClassNode::Member::FUNCTION:
resolve_function_signature(member.function);
break;
case GDScriptParser::ClassNode::Member::ENUM_VALUE: {
if (member.enum_value.custom_value) {
check_class_member_name_conflict(p_class, member.enum_value.identifier->name, member.enum_value.custom_value);
current_enum = member.enum_value.parent_enum;
reduce_expression(member.enum_value.custom_value);
current_enum = nullptr;
if (!member.enum_value.custom_value->is_constant) {
push_error(R"(Enum values must be constant.)", member.enum_value.custom_value);
} else if (member.enum_value.custom_value->reduced_value.get_type() != Variant::INT) {
push_error(R"(Enum values must be integers.)", member.enum_value.custom_value);
} else {
member.enum_value.value = member.enum_value.custom_value->reduced_value;
member.enum_value.resolved = true;
}
} else {
check_class_member_name_conflict(p_class, member.enum_value.identifier->name, member.enum_value.parent_enum);
if (member.enum_value.index > 0) {
member.enum_value.value = member.enum_value.parent_enum->values[member.enum_value.index - 1].value + 1;
} else {
member.enum_value.value = 0;
}
member.enum_value.resolved = true;
}
// Also update the original references.
member.enum_value.parent_enum->values.write[member.enum_value.index] = member.enum_value;
p_class->members.write[i].enum_value = member.enum_value;
} break;
case GDScriptParser::ClassNode::Member::CLASS:
check_class_member_name_conflict(p_class, member.m_class->identifier->name, member.m_class);
break;
case GDScriptParser::ClassNode::Member::GROUP:
// No-op, but needed to silence warnings.
break;
case GDScriptParser::ClassNode::Member::UNDEFINED:
ERR_PRINT("Trying to resolve undefined member.");
break;
}
}
// Recurse nested classes.
for (int i = 0; i < p_class->members.size(); i++) {
GDScriptParser::ClassNode::Member member = p_class->members[i];
if (member.type != GDScriptParser::ClassNode::Member::CLASS) {
continue;
}
resolve_class_interface(member.m_class);
}
parser->current_class = previous_class;
}
void GDScriptAnalyzer::resolve_class_body(GDScriptParser::ClassNode *p_class) {
if (p_class->resolved_body) {
return;
}
p_class->resolved_body = true;
GDScriptParser::ClassNode *previous_class = parser->current_class;
parser->current_class = p_class;
// Do functions and properties now.
for (int i = 0; i < p_class->members.size(); i++) {
GDScriptParser::ClassNode::Member member = p_class->members[i];
if (member.type == GDScriptParser::ClassNode::Member::FUNCTION) {
// Apply annotations.
for (GDScriptParser::AnnotationNode *&E : member.function->annotations) {
E->apply(parser, member.function);
}
#ifdef DEBUG_ENABLED
HashSet<uint32_t> previously_ignored = parser->ignored_warning_codes;
for (uint32_t ignored_warning : member.function->ignored_warnings) {
parser->ignored_warning_codes.insert(ignored_warning);
}
#endif // DEBUG_ENABLED
resolve_function_body(member.function);
#ifdef DEBUG_ENABLED
parser->ignored_warning_codes = previously_ignored;
#endif // DEBUG_ENABLED
} else if (member.type == GDScriptParser::ClassNode::Member::VARIABLE && member.variable->property != GDScriptParser::VariableNode::PROP_NONE) {
if (member.variable->property == GDScriptParser::VariableNode::PROP_INLINE) {
if (member.variable->getter != nullptr) {
member.variable->getter->set_datatype(member.variable->datatype);
resolve_function_body(member.variable->getter);
}
if (member.variable->setter != nullptr) {
resolve_function_signature(member.variable->setter);
if (member.variable->setter->parameters.size() > 0) {
member.variable->setter->parameters[0]->datatype_specifier = member.variable->datatype_specifier;
member.variable->setter->parameters[0]->set_datatype(member.get_datatype());
}
resolve_function_body(member.variable->setter);
}
}
}
}
parser->current_class = previous_class;
// Recurse nested classes.
for (int i = 0; i < p_class->members.size(); i++) {
GDScriptParser::ClassNode::Member member = p_class->members[i];
if (member.type != GDScriptParser::ClassNode::Member::CLASS) {
continue;
}
resolve_class_body(member.m_class);
}
// Check unused variables and datatypes of property getters and setters.
for (int i = 0; i < p_class->members.size(); i++) {
GDScriptParser::ClassNode::Member member = p_class->members[i];
if (member.type == GDScriptParser::ClassNode::Member::VARIABLE) {
#ifdef DEBUG_ENABLED
HashSet<uint32_t> previously_ignored = parser->ignored_warning_codes;
for (uint32_t ignored_warning : member.function->ignored_warnings) {
parser->ignored_warning_codes.insert(ignored_warning);
}
if (member.variable->usages == 0 && String(member.variable->identifier->name).begins_with("_")) {
parser->push_warning(member.variable->identifier, GDScriptWarning::UNUSED_PRIVATE_CLASS_VARIABLE, member.variable->identifier->name);
}
#endif
if (member.variable->property == GDScriptParser::VariableNode::PROP_SETGET) {
GDScriptParser::FunctionNode *getter_function = nullptr;
GDScriptParser::FunctionNode *setter_function = nullptr;
bool has_valid_getter = false;
bool has_valid_setter = false;
if (member.variable->getter_pointer != nullptr) {
if (p_class->has_function(member.variable->getter_pointer->name)) {
getter_function = p_class->get_member(member.variable->getter_pointer->name).function;
}
if (getter_function == nullptr) {
push_error(vformat(R"(Getter "%s" not found.)", member.variable->getter_pointer->name), member.variable);
} else if (getter_function->parameters.size() != 0 || getter_function->datatype.has_no_type()) {
push_error(vformat(R"(Function "%s" cannot be used as getter because of its signature.)", getter_function->identifier->name), member.variable);
} else if (!is_type_compatible(member.variable->datatype, getter_function->datatype, true)) {
push_error(vformat(R"(Function with return type "%s" cannot be used as getter for a property of type "%s".)", getter_function->datatype.to_string(), member.variable->datatype.to_string()), member.variable);
} else {
has_valid_getter = true;
#ifdef DEBUG_ENABLED
if (member.variable->datatype.builtin_type == Variant::INT && getter_function->datatype.builtin_type == Variant::FLOAT) {
parser->push_warning(member.variable, GDScriptWarning::NARROWING_CONVERSION);
}
#endif
}
}
if (member.variable->setter_pointer != nullptr) {
if (p_class->has_function(member.variable->setter_pointer->name)) {
setter_function = p_class->get_member(member.variable->setter_pointer->name).function;
}
if (setter_function == nullptr) {
push_error(vformat(R"(Setter "%s" not found.)", member.variable->setter_pointer->name), member.variable);