52 lines
1.2 KiB
JavaScript
52 lines
1.2 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 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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/**
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* Tests that a value is a valid constructor.
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*
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* @private
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* @param {*} value - value to test
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* @returns {(Error|null)} error object or null
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*
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* @example
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* var ctor = function ctor() {};
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*
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* var err = validate( ctor );
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* // returns null
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*
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* err = validate( null );
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* // returns <TypeError>
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*/
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function validate( value ) {
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var type = typeof value;
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if (
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value === null ||
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(type !== 'object' && type !== 'function')
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) {
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return new TypeError( 'invalid argument. A provided constructor must be either an object (except null) or a function. Value: `'+value+'`.' );
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}
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return null;
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}
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// EXPORTS //
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module.exports = validate;
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