Allow more characters in string:match()

Question

string:match( "[^%w%s]" )

This currently allows only letters, numbers and spaces as far as I understand. How can I add characters to it? For example I'd like to allow ( and _ too.

Answer 1

string:match( "[^%w%s(_]" )

This would add the characters you mentioned. Basically any character you add in the square brackets.

Some need to be escaped, such as parentheses.