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LibJS: Add the CreateMappedArgumentsObject abstract operation

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This patch adds a new ArgumentsObject class to represent what the spec
calls "Arguments Exotic Objects"

These are constructed by the new CreateMappedArgumentsObject when the
`arguments` identifier is resolved in a callee context.

The implementation is incomplete and doesn't yet support mapping of
the parameter variables to the indexed properties of `arguments`.
This commit is contained in:
Andreas Kling 2021-06-28 13:26:01 +02:00
parent a55cf08ef9
commit 2d4eb40f59
8 changed files with 95 additions and 10 deletions
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26
Userland/Libraries/LibJS/Runtime/ArgumentsObject.cpp Normal file
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@ -0,0 +1,26 @@
/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/ArgumentsObject.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
ArgumentsObject::ArgumentsObject(GlobalObject& global_object)
: Object(*global_object.object_prototype())
{
}
void ArgumentsObject::initialize(GlobalObject& global_object)
{
Base::initialize(global_object);
}
ArgumentsObject::~ArgumentsObject()
{
}
}