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LibJS: Add Object.{isExtensible,preventExtensions}()

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Matthew Olsson 2020-06-01 21:13:16 -07:00 • committed by Andreas Kling
parent daa3f59a55
commit d5ae73a63b
6 changed files with 118 additions and 0 deletions
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22
Libraries/LibJS/Runtime/ObjectConstructor.cpp
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@ -48,6 +48,8 @@ ObjectConstructor::ObjectConstructor()
define_native_function("getOwnPropertyNames", get_own_property_names, 1, attr);
define_native_function("getPrototypeOf", get_prototype_of, 1, attr);
define_native_function("setPrototypeOf", set_prototype_of, 2, attr);
define_native_function("isExtensible", is_extensible, 1, attr);
define_native_function("preventExtensions", prevent_extensions, 1, attr);
define_native_function("keys", keys, 1, attr);
define_native_function("values", values, 1, attr);
define_native_function("entries", entries, 1, attr);
@ -104,6 +106,26 @@ Value ObjectConstructor::set_prototype_of(Interpreter& interpreter)
return {};
}
Value ObjectConstructor::is_extensible(Interpreter& interpreter)
{
auto argument = interpreter.argument(0);
if (!argument.is_object())
return Value(false);
return Value(argument.as_object().is_extensible());
}
Value ObjectConstructor::prevent_extensions(Interpreter& interpreter)
{
auto argument = interpreter.argument(0);
if (!argument.is_object())
return argument;
if (!argument.as_object().prevent_extensions()) {
interpreter.throw_exception<TypeError>("Proxy preventExtensions handler returned false");
return {};
}
return argument;
}
Value ObjectConstructor::get_own_property_descriptor(Interpreter& interpreter)
{
auto* object = interpreter.argument(0).to_object(interpreter);