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LibJS: Implement Function.prototype.bind()

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Jack Karamanian 2020-04-19 15:03:02 -05:00 • committed by Andreas Kling
parent b3800829da
commit 1fa0c7304d
10 changed files with 317 additions and 6 deletions
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Libraries/LibJS/Runtime/BoundFunction.cpp Normal file
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/*
* Copyright (c) 2020, Jack Karamanian <karamanian.jack@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/BoundFunction.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
BoundFunction::BoundFunction(Function& target_function, Value bound_this, Vector<Value> arguments, i32 length, Object* constructor_prototype)
: Function::Function(*interpreter().global_object().function_prototype(), bound_this, move(arguments))
, m_target_function(&target_function)
, m_constructor_prototype(constructor_prototype)
, m_name(String::format("bound %s", target_function.name().characters()))
{
put("length", Value(length));
}
BoundFunction::~BoundFunction()
{
}
Value BoundFunction::call(Interpreter& interpreter)
{
return m_target_function->call(interpreter);
}
Value BoundFunction::construct(Interpreter& interpreter)
{
if (auto this_value = interpreter.this_value(); m_constructor_prototype && this_value.is_object()) {
this_value.as_object().set_prototype(m_constructor_prototype);
}
return m_target_function->construct(interpreter);
}
LexicalEnvironment* BoundFunction::create_environment()
{
return m_target_function->create_environment();
}
void BoundFunction::visit_children(Visitor& visitor)
{
Function::visit_children(visitor);
visitor.visit(m_target_function);
visitor.visit(m_constructor_prototype);
}
}