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* @license Apache-2.0
*
* Copyright (c) 2025 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 isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var hasProp = require( '@stdlib/assert/has-property' );
var DataType = require( '@stdlib/ndarray/dtype-ctor' );
// MAIN //
/**
* Tests whether an input value is an ndarray data type object.
*
* @param {*} value - value to test
* @returns {boolean} boolean indicating whether an input value is an ndarray data type object
*
* @example
* var DataType = require( '@stdlib/ndarray/dtype-ctor' );
*
* var bool = isDataTypeObject( new DataType( 'float64' ) );
* // returns true
*
* bool = isDataTypeObject( 'float64' );
* // returns false
*
* bool = isDataTypeObject( {} );
* // returns false
*/
function isDataTypeObject( value ) {
return (
value instanceof DataType ||
(
typeof value === 'object' &&
value !== null &&
isInteger( value.alignment ) &&
isInteger( value.byteLength ) &&
isString( value.byteOrder ) &&
isString( value.char ) &&
isInteger( value.enum ) &&
hasProp( value, 'value' )
)
);
}
// EXPORTS //
module.exports = isDataTypeObject;
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