com.google.javascript.jscomp.js.util.checkstringargs.js Maven / Gradle / Ivy
/*
* Copyright 2016 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'require base';
/**
* Throws if the argument is a RegExp, or if thisArg is undefined.
* @param {?} thisArg The 'this' arg, which must be defined.
* @param {*} arg The first argument of the function, which mustn't be a RegExp.
* @param {string} func Name of the function, for reporting.
* @return {string} The thisArg, coerced to a string.
*/
$jscomp.checkStringArgs = function(thisArg, arg, func) {
if (thisArg == null) {
throw new TypeError(
"The 'this' value for String.prototype." + func +
' must not be null or undefined');
}
if (arg instanceof RegExp) {
throw new TypeError(
'First argument to String.prototype.' + func +
' must not be a regular expression');
}
return thisArg + '';
};