55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2021 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MAIN //
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/**
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* Returns a regular expression to capture everything that is not a space immediately after the `function` keyword and before the first left parenthesis.
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*
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* @returns {RegExp} regular expression
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*
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* @example
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* var RE_FUNCTION_NAME = reFunctionName();
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*
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* function fname( fcn ) {
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* return RE_FUNCTION_NAME.exec( fcn.toString() )[ 1 ];
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* }
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*
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* var fn = fname( Math.sqrt );
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* // returns 'sqrt'
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*
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* fn = fname( Int8Array );
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* // returns 'Int8Array'
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*
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* fn = fname( Object.prototype.toString );
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* // returns 'toString'
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*
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* fn = fname( function(){} );
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* // returns ''
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*/
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function reFunctionName() {
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return /^\s*function\s*([^(]*)/i;
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}
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// EXPORTS //
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module.exports = reFunctionName;
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