src/builtins/regexp-exec.tq

// Copyright 2019 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.

#include 'src/builtins/builtins-regexp-gen.h'

namespace regexp {

  extern transitioning macro RegExpBuiltinsAssembler::RegExpPrototypeExecBody(
      implicit context: Context)(JSReceiver, String, constexpr bool): JSAny;

  transitioning macro RegExpPrototypeExecBodyFast(implicit context: Context)(
      receiver: JSReceiver, string: String): JSAny {
    return RegExpPrototypeExecBody(receiver, string, true);
  }

  transitioning macro RegExpPrototypeExecBodySlow(implicit context: Context)(
      receiver: JSReceiver, string: String): JSAny {
    return RegExpPrototypeExecBody(receiver, string, false);
  }

  // Slow path stub for RegExpPrototypeExec to decrease code size.
  transitioning builtin
  RegExpPrototypeExecSlow(implicit context: Context)(
      regexp: JSRegExp, string: String): JSAny {
    return RegExpPrototypeExecBodySlow(regexp, string);
  }

  extern macro RegExpBuiltinsAssembler::IsFastRegExpNoPrototype(
      implicit context: Context)(Object): bool;

  // ES#sec-regexp.prototype.exec
  // RegExp.prototype.exec ( string )
  transitioning javascript builtin RegExpPrototypeExec(
      js-implicit context: Context, receiver: JSAny)(string: JSAny): JSAny {
    // Ensure {receiver} is a JSRegExp.
    const receiver = Cast<JSRegExp>(receiver) otherwise ThrowTypeError(
        kIncompatibleMethodReceiver, 'RegExp.prototype.exec', receiver);
    const string = ToString_Inline(context, string);

    return IsFastRegExpNoPrototype(receiver) ?
        RegExpPrototypeExecBodyFast(receiver, string) :
        RegExpPrototypeExecSlow(receiver, string);
  }
}