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LibJS: Implement the CreateUnmappedArgumentsObject abstract operation

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This commit is contained in:
Andreas Kling 2021-06-28 01:44:58 +02:00
parent 63a1275378
commit 9eed7444de
4 changed files with 46 additions and 5 deletions
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34
Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp
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@ -11,6 +11,8 @@
#include <LibJS/Interpreter.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/ArrayPrototype.h>
#include <LibJS/Runtime/BoundFunction.h>
#include <LibJS/Runtime/DeclarativeEnvironmentRecord.h>
#include <LibJS/Runtime/ErrorTypes.h>
@ -204,4 +206,36 @@ Value perform_eval(Value x, GlobalObject& caller_realm, CallerMode strict_caller
return interpreter.execute_statement(caller_realm, program).value_or(js_undefined());
}
// 10.4.4.6 CreateUnmappedArgumentsObject ( argumentsList ), https://tc39.es/ecma262/#sec-createunmappedargumentsobject
Object* create_unmapped_arguments_object(GlobalObject& global_object, Vector<Value> const& arguments)
{
auto& vm = global_object.vm();
// FIXME: This should use OrdinaryObjectCreate
auto* object = Object::create(global_object, global_object.object_prototype());
if (vm.exception())
return nullptr;
// 4. Perform DefinePropertyOrThrow(obj, "length", PropertyDescriptor { [[Value]]: 𝔽(len), [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true }).
auto length = arguments.size();
object->define_property(vm.names.length, Value(length), Attribute::Writable | Attribute::Configurable);
if (vm.exception())
return nullptr;
object->define_property(*vm.well_known_symbol_iterator(), global_object.array_prototype()->get(vm.names.values), Attribute::Writable | Attribute::Configurable);
for (auto& argument : arguments)
object->indexed_properties().append(argument);
// FIXME: 8. Perform ! DefinePropertyOrThrow(obj, "callee", PropertyDescriptor { [[Get]]: %ThrowTypeError%, [[Set]]: %ThrowTypeError%, [[Enumerable]]: false, [[Configurable]]: false }).
PropertyAttributes attributes;
attributes.set_has_configurable();
attributes.set_has_enumerable();
object->define_property(vm.names.callee, js_undefined(), attributes);
if (vm.exception())
return nullptr;
return object;
}
}