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LibJS: Update spec steps / links for the JSON modules proposal

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This proposal has reached stage 4 and been merged into the main ECMA-262
spec. See:

3feb1ba
This commit is contained in:
Timothy Flynn 2025-04-28 16:22:48 -04:00 • committed by Tim Flynn
parent 3867a192a1
commit 2401764697
Notes: github-actions[bot] 2025-04-29 11:34:58 +00:00
5 changed files with 191 additions and 130 deletions
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49
Libraries/LibJS/Runtime/JSONObject.cpp
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@ -419,22 +419,57 @@ JS_DEFINE_NATIVE_FUNCTION(JSONObject::parse)
{
auto& realm = *vm.current_realm();
auto string = TRY(vm.argument(0).to_string(vm));
auto text = vm.argument(0);
auto reviver = vm.argument(1);
auto json = JsonValue::from_string(string);
if (json.is_error())
return vm.throw_completion<SyntaxError>(ErrorType::JsonMalformed);
Value unfiltered = parse_json_value(vm, json.value());
// 1. Let jsonString be ? ToString(text).
auto json_string = TRY(text.to_string(vm));
// 2. Let unfiltered be ? ParseJSON(jsonString).
auto unfiltered = TRY(parse_json(vm, json_string));
// 3. If IsCallable(reviver) is true, then
if (reviver.is_function()) {
// a. Let root be OrdinaryObjectCreate(%Object.prototype%).
auto root = Object::create(realm, realm.intrinsics().object_prototype());
auto root_name = String {};
// b. Let rootName be the empty String.
String root_name;
// c. Perform ! CreateDataPropertyOrThrow(root, rootName, unfiltered).
MUST(root->create_data_property_or_throw(root_name, unfiltered));
// d. Return ? InternalizeJSONProperty(root, rootName, reviver).
return internalize_json_property(vm, root, root_name, reviver.as_function());
}
// 4. Else,
// a. Return unfiltered.
return unfiltered;
}
// 25.5.1.1 ParseJSON ( text ), https://tc39.es/ecma262/#sec-ParseJSON
ThrowCompletionOr<Value> JSONObject::parse_json(VM& vm, StringView text)
{
auto json = JsonValue::from_string(text);
// 1. If StringToCodePoints(text) is not a valid JSON text as specified in ECMA-404, throw a SyntaxError exception.
if (json.is_error())
return vm.throw_completion<SyntaxError>(ErrorType::JsonMalformed);
// 2. Let scriptString be the string-concatenation of "(", text, and ");".
// 3. Let script be ParseText(scriptString, Script).
// 4. NOTE: The early error rules defined in 13.2.5.1 have special handling for the above invocation of ParseText.
// 5. Assert: script is a Parse Node.
// 6. Let result be ! Evaluation of script.
auto result = JSONObject::parse_json_value(vm, json.value());
// 7. NOTE: The PropertyDefinitionEvaluation semantics defined in 13.2.5.5 have special handling for the above evaluation.
// 8. Assert: result is either a String, a Number, a Boolean, an Object that is defined by either an ArrayLiteral or an ObjectLiteral, or null.
// 9. Return result.
return result;
}
Value JSONObject::parse_json_value(VM& vm, JsonValue const& value)
{
if (value.is_object())
@ -448,7 +483,7 @@ Value JSONObject::parse_json_value(VM& vm, JsonValue const& value)
if (value.is_string())
return PrimitiveString::create(vm, value.as_string());
if (value.is_bool())
return Value(static_cast<bool>(value.as_bool()));
return Value(value.as_bool());
VERIFY_NOT_REACHED();
}