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LibJS: Move [[ConstructorKind]] to ECMAScriptFunctionObject

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This commit is contained in:
Linus Groh 2021-09-24 23:34:13 +02:00
parent 1e97a85095
commit 06726d41ac
4 changed files with 25 additions and 20 deletions
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2
Userland/Libraries/LibJS/AST.cpp
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@ -886,7 +886,7 @@ Value ClassExpression::execute(Interpreter& interpreter, GlobalObject& global_ob
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::ClassExtendsValueNotAConstructorOrNull, super_constructor.to_string_without_side_effects()); interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::ClassExtendsValueNotAConstructorOrNull, super_constructor.to_string_without_side_effects());
return {}; return {};
} }
class_constructor->set_constructor_kind(FunctionObject::ConstructorKind::Derived); class_constructor->set_constructor_kind(ECMAScriptFunctionObject::ConstructorKind::Derived);
Object* super_constructor_prototype = nullptr; Object* super_constructor_prototype = nullptr;
if (!super_constructor.is_null()) { if (!super_constructor.is_null()) {

23
Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.h
View file

@ -17,6 +17,11 @@ class ECMAScriptFunctionObject final : public FunctionObject {
JS_OBJECT(ECMAScriptFunctionObject, FunctionObject); JS_OBJECT(ECMAScriptFunctionObject, FunctionObject);
public: public:
enum class ConstructorKind : u8 {
Base,
Derived,
};
enum class ThisMode : u8 { enum class ThisMode : u8 {
Lexical, Lexical,
Strict, Strict,
@ -45,6 +50,9 @@ public:
virtual Environment* environment() override { return m_environment; } virtual Environment* environment() override { return m_environment; }
virtual Realm* realm() const override { return m_realm; } virtual Realm* realm() const override { return m_realm; }
ConstructorKind constructor_kind() const { return m_constructor_kind; };
void set_constructor_kind(ConstructorKind constructor_kind) { m_constructor_kind = constructor_kind; }
ThisMode this_mode() const { return m_this_mode; } ThisMode this_mode() const { return m_this_mode; }
protected: protected:
@ -58,13 +66,14 @@ private:
Value execute_function_body(); Value execute_function_body();
// Internal Slots of ECMAScript Function Objects, https://tc39.es/ecma262/#table-internal-slots-of-ecmascript-function-objects // Internal Slots of ECMAScript Function Objects, https://tc39.es/ecma262/#table-internal-slots-of-ecmascript-function-objects
Environment* m_environment { nullptr }; // [[Environment]] Environment* m_environment { nullptr }; // [[Environment]]
Vector<FunctionNode::Parameter> const m_formal_parameters; // [[FormalParameters]] Vector<FunctionNode::Parameter> const m_formal_parameters; // [[FormalParameters]]
NonnullRefPtr<Statement> m_ecmascript_code; // [[ECMAScriptCode]] NonnullRefPtr<Statement> m_ecmascript_code; // [[ECMAScriptCode]]
Realm* m_realm { nullptr }; // [[Realm]] ConstructorKind m_constructor_kind { ConstructorKind::Base }; // [[ConstructorKind]]
ThisMode m_this_mode { ThisMode::Global }; // [[ThisMode]] Realm* m_realm { nullptr }; // [[Realm]]
bool m_strict { false }; // [[Strict]] ThisMode m_this_mode { ThisMode::Global }; // [[ThisMode]]
bool m_is_class_constructor { false }; // [[IsClassConstructor]] bool m_strict { false }; // [[Strict]]
bool m_is_class_constructor { false }; // [[IsClassConstructor]]
FlyString m_name; FlyString m_name;
Optional<Bytecode::Executable> m_bytecode_executable; Optional<Bytecode::Executable> m_bytecode_executable;

9
Userland/Libraries/LibJS/Runtime/FunctionObject.h
View file

@ -15,11 +15,6 @@ class FunctionObject : public Object {
JS_OBJECT(Function, Object); JS_OBJECT(Function, Object);
public: public:
enum class ConstructorKind {
Base,
Derived,
};
virtual ~FunctionObject(); virtual ~FunctionObject();
virtual void initialize(GlobalObject&) override { } virtual void initialize(GlobalObject&) override { }
@ -37,9 +32,6 @@ public:
Object* home_object() const { return m_home_object; } Object* home_object() const { return m_home_object; }
void set_home_object(Object* home_object) { m_home_object = home_object; } void set_home_object(Object* home_object) { m_home_object = home_object; }
ConstructorKind constructor_kind() const { return m_constructor_kind; };
void set_constructor_kind(ConstructorKind constructor_kind) { m_constructor_kind = constructor_kind; }
virtual bool is_strict_mode() const { return false; } virtual bool is_strict_mode() const { return false; }
// [[Environment]] // [[Environment]]
@ -77,7 +69,6 @@ private:
Value m_bound_this; Value m_bound_this;
Vector<Value> m_bound_arguments; Vector<Value> m_bound_arguments;
Object* m_home_object { nullptr }; Object* m_home_object { nullptr };
ConstructorKind m_constructor_kind = ConstructorKind::Base;
bool m_has_simple_parameter_list { false }; bool m_has_simple_parameter_list { false };
Vector<InstanceField> m_fields; Vector<InstanceField> m_fields;
}; };

11
Userland/Libraries/LibJS/Runtime/VM.cpp
View file

@ -470,12 +470,14 @@ void VM::initialize_instance_elements(Object& object, FunctionObject& constructo
} }
} }
// FIXME: This function should not exist as-is, most of it should be moved to the individual
// [[Construct]] implementations so that this becomes the Construct() AO (3 steps).
Value VM::construct(FunctionObject& function, FunctionObject& new_target, Optional<MarkedValueList> arguments) Value VM::construct(FunctionObject& function, FunctionObject& new_target, Optional<MarkedValueList> arguments)
{ {
auto& global_object = function.global_object(); auto& global_object = function.global_object();
Value this_argument; Value this_argument;
if (function.constructor_kind() == FunctionObject::ConstructorKind::Base) if (!is<ECMAScriptFunctionObject>(function) || static_cast<ECMAScriptFunctionObject&>(function).constructor_kind() == ECMAScriptFunctionObject::ConstructorKind::Base)
this_argument = TRY_OR_DISCARD(ordinary_create_from_constructor<Object>(global_object, new_target, &GlobalObject::object_prototype)); this_argument = TRY_OR_DISCARD(ordinary_create_from_constructor<Object>(global_object, new_target, &GlobalObject::object_prototype));
// FIXME: prepare_for_ordinary_call() is not supposed to receive a BoundFunction, ProxyObject, etc. - ever. // FIXME: prepare_for_ordinary_call() is not supposed to receive a BoundFunction, ProxyObject, etc. - ever.
@ -507,7 +509,7 @@ Value VM::construct(FunctionObject& function, FunctionObject& new_target, Option
// If we are a Derived constructor, |this| has not been constructed before super is called. // If we are a Derived constructor, |this| has not been constructed before super is called.
callee_context.this_value = this_argument; callee_context.this_value = this_argument;
if (function.constructor_kind() == FunctionObject::ConstructorKind::Base) { if (!is<ECMAScriptFunctionObject>(function) || static_cast<ECMAScriptFunctionObject&>(function).constructor_kind() == ECMAScriptFunctionObject::ConstructorKind::Base) {
VERIFY(this_argument.is_object()); VERIFY(this_argument.is_object());
initialize_instance_elements(this_argument.as_object(), function); initialize_instance_elements(this_argument.as_object(), function);
if (exception()) if (exception())
@ -521,7 +523,10 @@ Value VM::construct(FunctionObject& function, FunctionObject& new_target, Option
// If we are constructing an instance of a derived class, // If we are constructing an instance of a derived class,
// set the prototype on objects created by constructors that return an object (i.e. NativeFunction subclasses). // set the prototype on objects created by constructors that return an object (i.e. NativeFunction subclasses).
if (function.constructor_kind() == FunctionObject::ConstructorKind::Base && new_target.constructor_kind() == FunctionObject::ConstructorKind::Derived && result.is_object()) {
if ((!is<ECMAScriptFunctionObject>(function) || static_cast<ECMAScriptFunctionObject&>(function).constructor_kind() == ECMAScriptFunctionObject::ConstructorKind::Base)
&& is<ECMAScriptFunctionObject>(new_target) && static_cast<ECMAScriptFunctionObject&>(new_target).constructor_kind() == ECMAScriptFunctionObject::ConstructorKind::Derived
&& result.is_object()) {
if (auto* environment = callee_context.lexical_environment) if (auto* environment = callee_context.lexical_environment)
verify_cast<FunctionEnvironment>(environment)->replace_this_binding(result); verify_cast<FunctionEnvironment>(environment)->replace_this_binding(result);
auto prototype = new_target.get(names.prototype); auto prototype = new_target.get(names.prototype);