b7e5f08e56
To no one's surprise, this patch is pretty big - this is possibly the most used AO of all of them. Definitely worth it though.
60 lines
2 KiB
C++
60 lines
2 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Interpreter.h>
|
|
#include <LibJS/Runtime/BoundFunction.h>
|
|
#include <LibJS/Runtime/FunctionObject.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
|
|
namespace JS {
|
|
|
|
FunctionObject::FunctionObject(Object& prototype)
|
|
: Object(prototype)
|
|
{
|
|
}
|
|
|
|
FunctionObject::~FunctionObject()
|
|
{
|
|
}
|
|
|
|
BoundFunction* FunctionObject::bind(Value bound_this_value, Vector<Value> arguments)
|
|
{
|
|
auto& vm = this->vm();
|
|
FunctionObject& target_function = is<BoundFunction>(*this) ? static_cast<BoundFunction&>(*this).bound_target_function() : *this;
|
|
|
|
auto bound_this_object = [&vm, bound_this_value, this]() -> Value {
|
|
if (is<BoundFunction>(*this) && !static_cast<BoundFunction&>(*this).bound_this().is_empty())
|
|
return static_cast<BoundFunction&>(*this).bound_this();
|
|
switch (bound_this_value.type()) {
|
|
case Value::Type::Undefined:
|
|
case Value::Type::Null:
|
|
if (vm.in_strict_mode())
|
|
return bound_this_value;
|
|
return &global_object();
|
|
default:
|
|
return bound_this_value.to_object(global_object());
|
|
}
|
|
}();
|
|
|
|
i32 computed_length = 0;
|
|
auto length_property = TRY_OR_DISCARD(get(vm.names.length));
|
|
if (length_property.is_number())
|
|
computed_length = max(0, length_property.as_i32() - static_cast<i32>(arguments.size()));
|
|
|
|
Object* constructor_prototype = nullptr;
|
|
auto prototype_property = TRY_OR_DISCARD(target_function.get(vm.names.prototype));
|
|
if (prototype_property.is_object())
|
|
constructor_prototype = &prototype_property.as_object();
|
|
|
|
Vector<Value> all_bound_arguments;
|
|
if (is<BoundFunction>(*this))
|
|
all_bound_arguments.extend(static_cast<BoundFunction&>(*this).bound_arguments());
|
|
all_bound_arguments.extend(move(arguments));
|
|
|
|
return heap().allocate<BoundFunction>(global_object(), global_object(), target_function, bound_this_object, move(all_bound_arguments), computed_length, constructor_prototype);
|
|
}
|
|
|
|
}
|