pub/ImplabJs: src/implab/safe.js comparison

comparison src/implab/safe.js @ 7:9c0943c68a90

minor fixes added safe.async(fn, thisArg)

author	cin
date	Tue, 20 Jun 2017 19:45:15 +0300
parents	00779cb63b12
children	f0035923ff3e

comparison

equal deleted inserted replaced

-:9663631cbdb9
+:9c0943c68a90
 dest[tmpl[p]] = src[p];
 }
 }
 }
 return dest;
+},
+/** Wraps the specified function to emulate an asynchronous execution.
+* @param{Object} thisArg [Optional] Object which will be passed as 'this' to the function.
+* @param{Function|String} fn [Required] Function wich will be wrapped.
+*/
+async: function (fn, thisArg) {
+if (arguments.length == 2)
+fn = thisArg[fn];
+if (fn == null)
+throw new Error("The function must be specified");
+function wrapresult(x, e) {
+if (e) {
+return {
+then: function (cb, eb) {
+try {
+return eb ? wrapresult(eb(e)) : this;
+} catch (e2) {
+return wrapresult(null, e2);
+}
+}
+};
+} else {
+if (x && x.then)
+return x;
+return {
+then : function(cb) {
+try {
+return cb ? wrapresult(cb(x)) : this;
+} catch(e2) {
+return wrapresult(e2);
+}
+}
+};
+}
+}
+return /** @this */ function () {
+try {
+return wrapresult(fn.apply(this, arguments));
+} catch (e) {
+return wrapresult(null, e);
+}
+};
 },
 create: function () {
 if (console && console.warn)
 console.warn("implab/safe::create is deprecated use Object.create instead");