66 lines
1.4 KiB
JavaScript
66 lines
1.4 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2018 The Stdlib 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.
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
// MODULES //
|
|
|
|
var hasToStringTag = require( '@stdlib/assert-has-tostringtag-support' );
|
|
var nativeClass = require( '@stdlib/utils-native-class' );
|
|
var test = require( './try2exec.js' );
|
|
|
|
|
|
// VARIABLES //
|
|
|
|
var FLG = hasToStringTag();
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Tests if a value is a regular expression.
|
|
*
|
|
* @param {*} value - value to test
|
|
* @returns {boolean} boolean indicating whether value is a regular expression
|
|
*
|
|
* @example
|
|
* var bool = isRegExp( /\.+/ );
|
|
* // returns true
|
|
*
|
|
* @example
|
|
* var bool = isRegExp( {} );
|
|
* // returns false
|
|
*/
|
|
function isRegExp( value ) {
|
|
if ( typeof value === 'object' ) {
|
|
if ( value instanceof RegExp ) {
|
|
return true;
|
|
}
|
|
if ( FLG ) {
|
|
return test( value );
|
|
}
|
|
return ( nativeClass( value ) === '[object RegExp]' );
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = isRegExp;
|