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LibJS: Add spec comments to RegExp.prototype.compile

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Timothy Flynn 2021-12-17 15:12:37 -05:00 • committed by Linus Groh
parent c6e2b03073
commit 4a915fc9fa
1 changed files with 16 additions and 10 deletions
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26
Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
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@ -860,27 +860,33 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_split)
// B.2.4.1 RegExp.prototype.compile ( pattern, flags ), https://tc39.es/ecma262/#sec-regexp.prototype.compile
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::compile)
{
auto* regexp_object = TRY(typed_this_object(global_object));
auto pattern = vm.argument(0);
auto flags = vm.argument(1);
Value pattern_value;
Value flags_value;
// 1. Let O be the this value.
// 2. Perform ? RequireInternalSlot(O, [[RegExpMatcher]]).
auto* regexp_object = TRY(typed_this_object(global_object));
// 3. If Type(pattern) is Object and pattern has a [[RegExpMatcher]] internal slot, then
if (pattern.is_object() && is<RegExpObject>(pattern.as_object())) {
// a. If flags is not undefined, throw a TypeError exception.
if (!flags.is_undefined())
return vm.throw_completion<TypeError>(global_object, ErrorType::NotUndefined, flags.to_string_without_side_effects());
auto& regexp_pattern = static_cast<RegExpObject&>(pattern.as_object());
pattern_value = js_string(vm, regexp_pattern.pattern());
flags_value = js_string(vm, regexp_pattern.flags());
} else {
pattern_value = pattern;
flags_value = flags;
// b. Let P be pattern.[[OriginalSource]].
pattern = js_string(vm, regexp_pattern.pattern());
// c. Let F be pattern.[[OriginalFlags]].
flags = js_string(vm, regexp_pattern.flags());
}
// 4. Else,
// a. Let P be pattern.
// b. Let F be flags.
return TRY(regexp_object->regexp_initialize(global_object, pattern_value, flags_value));
// 5. Return ? RegExpInitialize(O, P, F).
return TRY(regexp_object->regexp_initialize(global_object, pattern, flags));
}
}