javascript - JS regex remove typecasts -

i'm trying remove type casts js file.

the current (not-working) regex have is:

/(?!new\s+&?!function\s+)\w+\((.+)\)/gi 

basically want class(var) not new class(arg) or function func(arg)

thanks!

 s = "basically want class(var) not new class(arg) or function func(arg)"  re = /(?:(?!new|function)\b\s+|^|[^\w\s])\s*\b([a-z]\w*\s*\(.*?\))/g  (var match; (match = re.exec(s));) { alert(match[1]); } 

produces

 class(var) 

but match correctly if there no nested parentheses in actual parameter list. match function call not possible using regular expressions since regular grammars can't handled nested parenthetical groups.