优化

MrShi

2025-09-12 202d13acd6f02b6573213e49326bc1f092d57b99

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'use strict';
var call = require('../internals/function-call');
var fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');
var anObject = require('../internals/an-object');
var isNullOrUndefined = require('../internals/is-null-or-undefined');
var requireObjectCoercible = require('../internals/require-object-coercible');
var sameValue = require('../internals/same-value');
var toString = require('../internals/to-string');
var getMethod = require('../internals/get-method');
var regExpExec = require('../internals/regexp-exec-abstract');
 
// @@search logic
fixRegExpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
  return [
    // `String.prototype.search` method
    // https://tc39.es/ecma262/#sec-string.prototype.search
    function search(regexp) {
      var O = requireObjectCoercible(this);
      var searcher = isNullOrUndefined(regexp) ? undefined : getMethod(regexp, SEARCH);
      return searcher ? call(searcher, regexp, O) : new RegExp(regexp)[SEARCH](toString(O));
    },
    // `RegExp.prototype[@@search]` method
    // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
    function (string) {
      var rx = anObject(this);
      var S = toString(string);
      var res = maybeCallNative(nativeSearch, rx, S);
 
      if (res.done) return res.value;
 
      var previousLastIndex = rx.lastIndex;
      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
      var result = regExpExec(rx, S);
      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
      return result === null ? -1 : result.index;
    }
  ];
});