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LibJS: Add spec comments to Value::to_object()

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This commit is contained in:
Linus Groh 2022-12-09 23:58:26 +00:00
parent 9c10624278
commit 63f6099cc3
1 changed files with 18 additions and 1 deletions
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19
Userland/Libraries/LibJS/Runtime/Value.cpp
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@ -519,22 +519,39 @@ ThrowCompletionOr<Object*> Value::to_object(VM& vm) const
{ {
auto& realm = *vm.current_realm(); auto& realm = *vm.current_realm();
VERIFY(!is_empty()); VERIFY(!is_empty());
if (is_number())
// Number
if (is_number()) {
// Return a new Number object whose [[NumberData]] internal slot is set to argument. See 21.1 for a description of Number objects.
return NumberObject::create(realm, as_double()); return NumberObject::create(realm, as_double());
}
switch (m_value.tag) { switch (m_value.tag) {
// Undefined
// Null
case UNDEFINED_TAG: case UNDEFINED_TAG:
case NULL_TAG: case NULL_TAG:
// Throw a TypeError exception.
return vm.throw_completion<TypeError>(ErrorType::ToObjectNullOrUndefined); return vm.throw_completion<TypeError>(ErrorType::ToObjectNullOrUndefined);
// Boolean
case BOOLEAN_TAG: case BOOLEAN_TAG:
// Return a new Boolean object whose [[BooleanData]] internal slot is set to argument. See 20.3 for a description of Boolean objects.
return BooleanObject::create(realm, as_bool()); return BooleanObject::create(realm, as_bool());
// String
case STRING_TAG: case STRING_TAG:
// Return a new String object whose [[StringData]] internal slot is set to argument. See 22.1 for a description of String objects.
return StringObject::create(realm, const_cast<JS::PrimitiveString&>(as_string()), *realm.intrinsics().string_prototype()); return StringObject::create(realm, const_cast<JS::PrimitiveString&>(as_string()), *realm.intrinsics().string_prototype());
// Symbol
case SYMBOL_TAG: case SYMBOL_TAG:
// Return a new Symbol object whose [[SymbolData]] internal slot is set to argument. See 20.4 for a description of Symbol objects.
return SymbolObject::create(realm, const_cast<JS::Symbol&>(as_symbol())); return SymbolObject::create(realm, const_cast<JS::Symbol&>(as_symbol()));
// BigInt
case BIGINT_TAG: case BIGINT_TAG:
// Return a new BigInt object whose [[BigIntData]] internal slot is set to argument. See 21.2 for a description of BigInt objects.
return BigIntObject::create(realm, const_cast<JS::BigInt&>(as_bigint())); return BigIntObject::create(realm, const_cast<JS::BigInt&>(as_bigint()));
// Object
case OBJECT_TAG: case OBJECT_TAG:
// Return argument.
return &const_cast<Object&>(as_object()); return &const_cast<Object&>(as_object());
default: default:
VERIFY_NOT_REACHED(); VERIFY_NOT_REACHED();