support shorthand method name in object literal (#4264)

lib/parse.js

@@ -1342,6 +1342,20 @@ function parse($TEXT, options) {
             var start = S.token;
             var type = start.type;
             var name = as_property_name();
+            if (is("punc", "(")) {
+                var func_start = S.token;
+                var func = function_(AST_Function);
+                func.start = func_start;
+                func.end = prev();
+                a.push(new AST_ObjectKeyVal({
+                    start: start,
+                    quote: start.quote,
+                    key: "" + name,
+                    value: func,
+                    end: prev(),
+                }));
+                continue;
+            }
             if (!is("punc", ":") && type == "name") switch (name) {
               case "get":
                 a.push(new AST_ObjectGetter({
@@ -1379,11 +1393,11 @@ function parse($TEXT, options) {
             }
             expect(":");
             a.push(new AST_ObjectKeyVal({
-                start : start,
-                quote : start.quote,
-                key   : "" + name,
-                value : expression(false),
-                end   : prev()
+                start: start,
+                quote: start.quote,
+                key: "" + name,
+                value: expression(false),
+                end: prev(),
             }));
         }
         next();