Regex for matching Functions and Capturing their Arguments

Question

I\'m working on a calculator and it takes string expressions and evaluates them. I have a function that searches the expression for math functions using Regex, retrieves the

Answer 1

This regex does what you want:

^(?\w+)\((?>(?(param),)(?(?>(?>[^\(\),"]|(?
\()|(?<-p>\))|(?(p)[^\(\)]|(?!))|(?(g)(?:""|[^"]|(?<-g>"))|(?!))|(?")))*))+\)$

Don't forget to escape backslashes and double quotes when pasting it in your code.

It will match correctly arguments in double quotes, inner functions and numbers like this one:
f1(123,"df""j"" , dhf",abc12,func2(),func(123,a>2))

The param stack will contains
123
"df""j"" , dhf"
abc12
func2()
func(123,a>2)