fe5c2b7bb9
Now that only ECMAScriptFunctionObject uses this, we can remove the FunctionObject::new_function_environment() pure virtual method and just implement it as a standalone AO with an ECMAScriptFunctionObject parameter, next to the other NewFooEnvironment AOs.
95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, Jack Karamanian <karamanian.jack@gmail.com>
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* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/BoundFunction.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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BoundFunction::BoundFunction(GlobalObject& global_object, FunctionObject& bound_target_function, Value bound_this, Vector<Value> bound_arguments, i32 length, Object* constructor_prototype)
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: FunctionObject(*global_object.function_prototype())
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, m_bound_target_function(&bound_target_function)
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, m_bound_this(bound_this)
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, m_bound_arguments(move(bound_arguments))
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, m_constructor_prototype(constructor_prototype)
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, m_name(String::formatted("bound {}", bound_target_function.name()))
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, m_length(length)
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{
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}
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void BoundFunction::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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Base::initialize(global_object);
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define_direct_property(vm.names.length, Value(m_length), Attribute::Configurable);
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}
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BoundFunction::~BoundFunction()
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{
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}
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// 10.4.1.1 [[Call]] ( thisArgument, argumentsList ), https://tc39.es/ecma262/#sec-bound-function-exotic-objects-call-thisargument-argumentslist
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ThrowCompletionOr<Value> BoundFunction::internal_call([[maybe_unused]] Value this_argument, MarkedValueList arguments_list)
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{
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// 1. Let target be F.[[BoundTargetFunction]].
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auto& target = *m_bound_target_function;
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// 2. Let boundThis be F.[[BoundThis]].
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auto bound_this = m_bound_this;
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// 3. Let boundArgs be F.[[BoundArguments]].
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auto& bound_args = m_bound_arguments;
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// 4. Let args be the list-concatenation of boundArgs and argumentsList.
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auto args = MarkedValueList { heap() };
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args.extend(bound_args);
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args.extend(move(arguments_list));
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// 5. Return ? Call(target, boundThis, args).
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return call(global_object(), &target, bound_this, move(args));
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}
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// 10.4.1.2 [[Construct]] ( argumentsList, newTarget ), https://tc39.es/ecma262/#sec-bound-function-exotic-objects-construct-argumentslist-newtarget
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ThrowCompletionOr<Object*> BoundFunction::internal_construct(MarkedValueList arguments_list, FunctionObject& new_target)
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{
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// 1. Let target be F.[[BoundTargetFunction]].
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auto& target = *m_bound_target_function;
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// 2. Assert: IsConstructor(target) is true.
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VERIFY(Value(&target).is_constructor());
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// 3. Let boundArgs be F.[[BoundArguments]].
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auto& bound_args = m_bound_arguments;
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// 4. Let args be the list-concatenation of boundArgs and argumentsList.
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auto args = MarkedValueList { heap() };
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args.extend(bound_args);
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args.extend(move(arguments_list));
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// 5. If SameValue(F, newTarget) is true, set newTarget to target.
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auto* final_new_target = &new_target;
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if (this == &new_target)
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final_new_target = ⌖
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// 6. Return ? Construct(target, args, newTarget).
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return construct(global_object(), target, move(args), final_new_target);
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}
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void BoundFunction::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_bound_target_function);
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visitor.visit(m_bound_this);
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for (auto argument : m_bound_arguments)
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visitor.visit(argument);
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visitor.visit(m_constructor_prototype);
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}
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}
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