81 lines
1.8 KiB
JavaScript
81 lines
1.8 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 nativeClass = require( '@stdlib/utils-native-class' );
|
|
var RE = require( '@stdlib/regexp-function-name' ).REGEXP;
|
|
var isBuffer = require( '@stdlib/assert-is-buffer' );
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Determines the name of a value's constructor.
|
|
*
|
|
* @param {*} v - input value
|
|
* @returns {string} name of a value's constructor
|
|
*
|
|
* @example
|
|
* var v = constructorName( 'a' );
|
|
* // returns 'String'
|
|
*
|
|
* @example
|
|
* var v = constructorName( 5 );
|
|
* // returns 'Number'
|
|
*
|
|
* @example
|
|
* var v = constructorName( null );
|
|
* // returns 'Null'
|
|
*
|
|
* @example
|
|
* var v = constructorName( undefined );
|
|
* // returns 'Undefined'
|
|
*
|
|
* @example
|
|
* var v = constructorName( function noop() {} );
|
|
* // returns 'Function'
|
|
*/
|
|
function constructorName( v ) {
|
|
var match;
|
|
var name;
|
|
var ctor;
|
|
name = nativeClass( v ).slice( 8, -1 );
|
|
if ( (name === 'Object' || name === 'Error') && v.constructor ) {
|
|
ctor = v.constructor;
|
|
if ( typeof ctor.name === 'string' ) {
|
|
return ctor.name;
|
|
}
|
|
match = RE.exec( ctor.toString() );
|
|
if ( match ) {
|
|
return match[ 1 ];
|
|
}
|
|
}
|
|
if ( isBuffer( v ) ) {
|
|
return 'Buffer';
|
|
}
|
|
return name;
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = constructorName;
|