fix: use tryRequire with JS fallback in native.js

Author: rajanarahul93

lib/node_modules/@stdlib/math/base/special/gammaincinv/lib/native.js

@@ -1,21 +1,3 @@
-/**
-* @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 //
@@ -28,29 +10,13 @@ var isError = require( '@stdlib/assert/is-error' );
 // MAIN //
 
 // Attempt to load the native addon:
-var addon = tryRequire( join( __dirname, '..', 'build', 'Release', 'math.base.special.gammaincinv.node' ) ); // eslint-disable-line stdlib/no-dynamic-require
-
-// If we failed to load the addon, raise an error:
-if ( isError( addon ) ) {
-	throw new Error( 'failed to load native addon. Error: ' + addon.message );
-}
+var gammaincinv = tryRequire(
+	join( __dirname, '..', 'build', 'Release', 'math.base.special.gammaincinv.node' )
+); // eslint-disable-line stdlib/no-dynamic-require
 
-/**
-* Inverts the lower incomplete gamma function.
-*
-* @param {Probability} p - probability value
-* @param {number} a - scale parameter
-* @param {boolean} [upper=false] - boolean indicating if the function should invert the upper tail
-* @returns {number} function value
-*
-* @example
-* var y = gammaincinv( 0.5, 1.0, false );
-* // returns ~0.693
-*/
-function gammaincinv( p, a, upper ) {
-	// Directly call the loaded native addon function
-	// The native function likely expects (double, double, bool)
-	return addon( p, a, upper === true );
+// Fallback to the pure JavaScript implementation if loading the addon fails:
+if ( isError( gammaincinv ) ) {
+	gammaincinv = require( './main.js' );
 }