How to get text with particular function name and with nested parentheses ( ) using RegEx?

Question

Reg Expression for Getting Text with particular function name and with nested parentheses, I had tried but i am not getting the RegEx. For this example

ignore if open or close parentheses between single quotes or double quotes.

eg: strcat("thanks for", param(add(a,b)), ' and ( valuable time ).')

Regex.Matches(script, @"(?x) \( ( (?: [^()]+ | (?<open>\() |
                           (?<-open>\)) )* (?(open)(?!)) ) \)");

Example:-

blelow one is the string and function name is param,

if(a>b, param(add(c,d)), param(2));

Output =>

1) param(add(c,d))

2) param(2)

Answer 1

Try this regex:

\b(?!if)\w+\s*\(.+?\)(?!\)\s*,)

Description

Demo

http://regexr.com?37grl

Discussion

You should customize this regex with other reserved keywords that accept parenthesis (switch for instance).

\b(?!if|switch)\w+\s*\(.+?\)(?!\)\s*,)

However, in your case, a C# parser is more appropriate.