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LibJS: Add the CreateMappedArgumentsObject abstract operation
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`.
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8 changed files with 95 additions and 10 deletions
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@ -7,6 +7,7 @@
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#pragma once
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#include <AK/Forward.h>
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#include <LibJS/AST.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Value.h>
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@ -24,6 +25,7 @@ FunctionObject* species_constructor(GlobalObject&, Object const&, FunctionObject
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GlobalObject* get_function_realm(GlobalObject&, FunctionObject const&);
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Object* get_prototype_from_constructor(GlobalObject&, FunctionObject const& constructor, Object* (GlobalObject::*intrinsic_default_prototype)());
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Object* create_unmapped_arguments_object(GlobalObject&, Vector<Value> const& arguments);
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Object* create_mapped_arguments_object(GlobalObject&, FunctionObject&, Vector<FunctionNode::Parameter> const&, Vector<Value> const& arguments, EnvironmentRecord&);
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enum class CallerMode {
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Strict,
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