Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* @license Apache-2.0
*
* Copyright (c) 2019 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 parse = require( 'acorn' ).parse;
// VARIABLES //
var AOPTS = {
'ecmaVersion': 'latest'
};
// MAIN //
/**
* Tests whether a command contains a top-level `"async"` directive.
*
* @private
* @param {string} cmd - command string
* @returns {boolean} boolean indicating whether a command contains a top-level "async" directive
*/
function hasAsyncDirective( cmd ) {
var nodes;
var ast;
var n;
var i;
try {
ast = parse( cmd, AOPTS );
} catch ( err ) { // eslint-disable-line no-unused-vars
return false;
}
nodes = ast.body;
for ( i = 0; i < nodes.length; i++ ) {
n = nodes[ i ];
if (
n.type === 'ExpressionStatement' &&
n.expression.type === 'Literal' &&
n.directive === 'async'
) {
return true;
}
}
return false;
}
// EXPORTS //
module.exports = hasAsyncDirective;
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