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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';
/**
* LAPACK routine to generate an M-by-N real matrix Q with orthonormal columns. The matrix Q is defined as the first N columns of a product of K elementary reflectors of order M. `Q = H(1) H(2) . . . H(K)` as returned by `dgeqrf`.
*
* @module @stdlib/lapack/base/dorg2r
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dorg2r = require( '@stdlib/lapack/base/dorg2r' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
* var tau = new Float64Array( [ 0.0, 0.0 ] );
* var work = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );
*
* dorg2r( 'column-major', 3, 2, 2, A, 3, tau, work );
* // A => <Float64Array>[ 1.0, 0.0, 0.0, 0.0, 1.0, 0.0 ]
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
* var dorg2r = require( '@stdlib/lapack/base/dorg2r' );
*
* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
* var tau = new Float64Array( [ 0.0, 0.0 ] );
* var work = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );
*
* dorg2r.ndarray( 3, 2, 2, A, 1, 3, 0, tau, 1, 0, work, 1, 0 );
* // A => <Float64Array>[ 1.0, 0.0, 0.0, 0.0, 1.0, 0.0 ]
*/
// MODULES //
var join = require( 'path' ).join;
var tryRequire = require( '@stdlib/utils/try-require' );
var isError = require( '@stdlib/assert/is-error' );
var main = require( './main.js' );
// MAIN //
var dorg2r;
var tmp = tryRequire( join( __dirname, './native.js' ) );
if ( isError( tmp ) ) {
dorg2r = main;
} else {
dorg2r = tmp;
}
// EXPORTS //
module.exports = dorg2r;
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