feat: add support for non-string data types

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/assert/is-complex-floating-point-data-type/README.md

@@ -44,7 +44,7 @@ var isComplexFloatingPointDataType = require( '@stdlib/ndarray/base/assert/is-co
 
 #### isComplexFloatingPointDataType( value )
 
-Tests if an input `value` is a supported ndarray complex-valued floating-point data type.
+Tests if an input value is a supported ndarray complex-valued floating-point data type.
 
 <!-- eslint-disable id-length -->
 

lib/node_modules/@stdlib/ndarray/base/assert/is-complex-floating-point-data-type/lib/main.js

@@ -24,6 +24,11 @@ var contains = require( '@stdlib/array/base/assert/contains' ).factory;
 var dtypes = require( '@stdlib/ndarray/dtypes' );
 
 
+// VARIABLES //
+
+var isDataType = contains( dtypes( 'complex_floating_point' ) );
+
+
 // MAIN //
 
 /**
@@ -77,7 +82,9 @@ var dtypes = require( '@stdlib/ndarray/dtypes' );
 * bool = isComplexFloatingPointDataType( 'foo' );
 * // returns false
 */
-var isComplexFloatingPointDataType = contains( dtypes( 'complex_floating_point' ) ); // eslint-disable-line id-length
+function isComplexFloatingPointDataType( v ) { // eslint-disable-line id-length
+	return isDataType( String( v ) );
+}
 
 
 // EXPORTS //

lib/node_modules/@stdlib/ndarray/base/assert/is-complex-floating-point-data-type/test/test.js

@@ -21,6 +21,7 @@
 // MODULES //
 
 var tape = require( 'tape' );
+var DataType = require( '@stdlib/ndarray/dtype-ctor' );
 var isComplexFloatingPointDataType = require( './../lib' ); // eslint-disable-line id-length
 
 
@@ -39,7 +40,9 @@ tape( 'the function returns `true` if provided a supported ndarray complex-value
 
 	values = [
 		'complex64',
-		'complex128'
+		'complex128',
+		new DataType( 'complex64' ),
+		new DataType( 'complex128' )
 	];
 	for ( i = 0; i < values.length; i++ ) {
 		bool = isComplexFloatingPointDataType( values[ i ] );
@@ -67,6 +70,8 @@ tape( 'the function returns `false` if not provided a supported ndarray complex-
 		'int8',
 		'generic',
 
+		new DataType( 'generic' ),
+
 		// Unsupported dtypes:
 		'float',
 		'int',