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LibJS: Add spec comments to RegExp.prototype [ @@matchAll ]

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Timothy Flynn 2021-12-17 14:45:30 -05:00 • committed by Linus Groh
parent 5eb4d2e96e
commit 9f7c3e6cad
1 changed files with 21 additions and 3 deletions
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24
Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
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@ -431,27 +431,45 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match)
// 22.2.5.8 RegExp.prototype [ @@matchAll ] ( string ), https://tc39.es/ecma262/#sec-regexp-prototype-matchall
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match_all)
{
// 1. Let R be the this value.
// 2. If Type(R) is not Object, throw a TypeError exception.
auto* regexp_object = TRY(this_object(global_object));
// 3. Let S be ? ToString(string).
auto string = TRY(vm.argument(0).to_utf16_string(global_object));
// 4. Let C be ? SpeciesConstructor(R, %RegExp%).
auto* constructor = TRY(species_constructor(global_object, *regexp_object, *global_object.regexp_constructor()));
// 5. Let flags be ? ToString(? Get(R, "flags")).
auto flags_value = TRY(regexp_object->get(vm.names.flags));
auto flags = TRY(flags_value.to_string(global_object));
bool global = flags.find('g').has_value();
bool unicode = flags.find('u').has_value();
// Steps 9-12 are performed early so that flags can be moved.
// 9. If flags contains "g", let global be true.
// 10. Else, let global be false.
bool global = flags.contains('g');
// 11. If flags contains "u", let fullUnicode be true.
// 12. Else, let fullUnicode be false.
bool full_unicode = flags.contains('u');
// 6. Let matcher be ? Construct(C, « R, flags »).
MarkedValueList arguments(vm.heap());
arguments.append(regexp_object);
arguments.append(js_string(vm, move(flags)));
auto* matcher = TRY(construct(global_object, *constructor, move(arguments)));
// 7. Let lastIndex be ? ToLength(? Get(R, "lastIndex")).
auto last_index_value = TRY(regexp_object->get(vm.names.lastIndex));
auto last_index = TRY(last_index_value.to_length(global_object));
// 8. Perform ? Set(matcher, "lastIndex", lastIndex, true).
TRY(matcher->set(vm.names.lastIndex, Value(last_index), Object::ShouldThrowExceptions::Yes));
return RegExpStringIterator::create(global_object, *matcher, move(string), global, unicode);
// 13. Return ! CreateRegExpStringIterator(matcher, S, global, fullUnicode).
return RegExpStringIterator::create(global_object, *matcher, move(string), global, full_unicode);
}
// 22.2.5.10 RegExp.prototype [ @@replace ] ( string, replaceValue ), https://tc39.es/ecma262/#sec-regexp.prototype-@@replace