'use strict';

var awaitify = require('../../../_virtual/awaitify.js');

(function (module, exports) {

	Object.defineProperty(exports, "__esModule", {
	    value: true
	});
	exports.default = awaitify;
	// conditionally promisify a function.
	// only return a promise if a callback is omitted
	function awaitify(asyncFn, arity) {
	    if (!arity) arity = asyncFn.length;
	    if (!arity) throw new Error('arity is undefined');
	    function awaitable(...args) {
	        if (typeof args[arity - 1] === 'function') {
	            return asyncFn.apply(this, args);
	        }

	        return new Promise((resolve, reject) => {
	            args[arity - 1] = (err, ...cbArgs) => {
	                if (err) return reject(err);
	                resolve(cbArgs.length > 1 ? cbArgs : cbArgs[0]);
	            };
	            asyncFn.apply(this, args);
	        });
	    }

	    return awaitable;
	}
	module.exports = exports.default; 
} (awaitify.__module, awaitify.__module.exports));

var awaitifyExports = awaitify.__module.exports;

exports.awaitifyExports = awaitifyExports;
