String.gsub for string, but exlude some parts

[Florian Berger <fberger@...>]

Hi.

I have following problem with strings. I want to use string.gsub to 
modify big string. However I don't want string.gsub to affect whole 
string. There are some parts that should be left as they are. For a 
example in a string containing C language file you could let string.gsub 
modify everything else except chars between the comments (/* .. */). Any 
ideas how to implement this?

f