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ladybird/Userland/Libraries/LibJS/Runtime/ObjectConstructor.h

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LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
Everywhere: Use linusg@serenityos.org for my copyright headers
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
*/
#pragma once
#include <LibJS/Runtime/NativeFunction.h>
namespace JS {
class ObjectConstructor final : public NativeFunction {
LibJS+LibWeb: Add JS::Object::inherits(class_name) To allow implementing the DOM class hierarchy in JS bindings, this patch adds an inherits() function that can be used to ask an Object if it inherits from a specific C++ class (by name). The necessary overrides are baked into each Object subclass by the new JS_OBJECT macro, which works similarly to C_OBJECT in LibCore. Thanks to @Dexesttp for suggesting this approach. :^)
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JS_OBJECT(ObjectConstructor, NativeFunction);
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
public:
LibJS+LibWeb: Replace GlobalObject with Realm in object constructors No functional changes - we can still very easily get to the global object via `Realm::global_object()`. This is in preparation of moving the intrinsics to the realm and no longer having to pass a global object when allocating any object. In a few (now, and many more in subsequent commits) places we get a realm using `GlobalObject::associated_realm()`, this is intended to be temporary. For example, create() functions will later receive the same treatment and are passed a realm instead of a global object.
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explicit ObjectConstructor(Realm&);
LibJS+LibWeb: Replace GlobalObject with Realm in initialize() functions This is a continuation of the previous commit. Calling initialize() is the first thing that's done after allocating a cell on the JS heap - and in the common case of allocating an object, that's where properties are assigned and intrinsics occasionally accessed. Since those are supposed to live on the realm eventually, this is another step into that direction.
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virtual void initialize(Realm&) override;
Libraries: Use default constructors/destructors in LibJS https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
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virtual ~ObjectConstructor() override = default;
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
LibJS: Convert NativeFunction::{call,construct}() to ThrowCompletionOr Both at the same time because many of them call construct() in call() and I'm not keen on adding a bunch of temporary plumbing to turn exceptions into throw completions. Also changes the return value of construct() to Object* instead of Value as it always needs to return an object; allowing an arbitrary Value is a massive foot gun.
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virtual ThrowCompletionOr<Value> call() override;
virtual ThrowCompletionOr<Object*> construct(FunctionObject& new_target) override;
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
private:
LibJS: Implement constructor/non-constructor function calls This adds Function::construct() for constructor function calls via `new` keyword. NativeFunction doesn't have constructor behaviour by default, ScriptFunction simply calls call() in construct()
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virtual bool has_constructor() const override { return true; }
LibJS: Rework how native functions are called to improve |this| value Native functions now only get the Interpreter& as an argument. They can then extract |this| along with any indexed arguments it wants from it. This forces functions that want |this| to actually deal with calling interpreter.this_value().to_object(), and dealing with the possibility of a non-object |this|. This is still not great but let's keep massaging it forward.
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LibJS: Convert ObjectConstructor to ThrowCompletionOr
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JS_DECLARE_NATIVE_FUNCTION(define_property);
JS_DECLARE_NATIVE_FUNCTION(define_properties);
JS_DECLARE_NATIVE_FUNCTION(is);
JS_DECLARE_NATIVE_FUNCTION(get_own_property_descriptor);
JS_DECLARE_NATIVE_FUNCTION(get_own_property_descriptors);
JS_DECLARE_NATIVE_FUNCTION(get_own_property_names);
JS_DECLARE_NATIVE_FUNCTION(get_own_property_symbols);
JS_DECLARE_NATIVE_FUNCTION(get_prototype_of);
JS_DECLARE_NATIVE_FUNCTION(set_prototype_of);
JS_DECLARE_NATIVE_FUNCTION(is_extensible);
JS_DECLARE_NATIVE_FUNCTION(is_frozen);
JS_DECLARE_NATIVE_FUNCTION(is_sealed);
JS_DECLARE_NATIVE_FUNCTION(prevent_extensions);
JS_DECLARE_NATIVE_FUNCTION(seal);
JS_DECLARE_NATIVE_FUNCTION(freeze);
JS_DECLARE_NATIVE_FUNCTION(from_entries);
JS_DECLARE_NATIVE_FUNCTION(keys);
JS_DECLARE_NATIVE_FUNCTION(values);
JS_DECLARE_NATIVE_FUNCTION(entries);
JS_DECLARE_NATIVE_FUNCTION(create);
JS_DECLARE_NATIVE_FUNCTION(has_own);
JS_DECLARE_NATIVE_FUNCTION(assign);
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 17:23:54 +01:00
};
}
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