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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
namespace string {
struct StringMatchFunctor {
macro FnSymbol(): Symbol {
return MatchSymbolConstant();
}
macro CanCallFast(implicit context: Context)(maybeRegExp: HeapObject): bool {
return regexp::IsFastRegExpForMatch(maybeRegExp);
}
transitioning macro CallFast(implicit context: Context)(
regexp: FastJSRegExp, string: String): JSAny {
return regexp::RegExpMatchFast(regexp, string);
}
}
struct StringSearchFunctor {
macro FnSymbol(): Symbol {
return SearchSymbolConstant();
}
macro CanCallFast(implicit context: Context)(maybeRegExp: HeapObject): bool {
return regexp::IsFastRegExpForSearch(maybeRegExp);
}
transitioning macro CallFast(implicit context: Context)(
regexp: FastJSRegExp, string: String): JSAny {
return regexp::RegExpSearchFast(regexp, string);
}
}
transitioning macro StringMatchSearch<F: type>(
implicit context: NativeContext, receiver: JSAny)(
regexp: JSAny, functor: F, methodName: constexpr string): JSAny {
// 1. Let O be ? RequireObjectCoercible(this value).
RequireObjectCoercible(receiver, methodName);
try {
// 3. Let string be ? ToString(O).
const string = Cast<String>(receiver) otherwise Slow;
const heapRegexp = Cast<HeapObject>(regexp) otherwise Slow;
if (!functor.CanCallFast(heapRegexp)) goto Slow;
return functor.CallFast(UnsafeCast<FastJSRegExp>(heapRegexp), string);
} label Slow deferred {
// 2. If regexp is neither undefined nor null, then
if (regexp != Undefined && regexp != Null) {
try {
// a. Let fn be ? GetMethod(regexp, @@match/@@search).
// b. If fn is not undefined, then
const fn = GetMethod(regexp, functor.FnSymbol())
otherwise FnSymbolIsNullOrUndefined;
// i. Return ? Call(fn, regexp, « O »).
return Call(context, fn, regexp, receiver);
} label FnSymbolIsNullOrUndefined {}
}
// 3. Let string be ? ToString(O).
const string = ToString_Inline(receiver);
// 4. Let rx be ? RegExpCreate(regexp, undefined).
const rx = regexp::RegExpCreate(context, regexp, kEmptyString);
// 5. Return ? Invoke(rx, @@match/@@search, « string »).
const fn = GetProperty(rx, functor.FnSymbol());
return Call(context, fn, rx, string);
}
}
// https://tc39.es/ecma262/#sec-string.prototype.match
transitioning javascript builtin
StringPrototypeMatch(
js-implicit context: NativeContext, receiver: JSAny)(regexp: JSAny): JSAny {
return StringMatchSearch(
regexp, StringMatchFunctor{}, 'String.prototype.match');
}
// https://tc39.es/ecma262/#sec-string.prototype.search
transitioning javascript builtin
StringPrototypeSearch(
js-implicit context: NativeContext, receiver: JSAny)(regexp: JSAny): JSAny {
return StringMatchSearch(
regexp, StringSearchFunctor{}, 'String.prototype.search');
}
}
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