Word completion: Change regex, multiple regex

Hello again,

is it in any way possible to change the regex of the word completion or use multiple regex? I want to achive that e. g. functions are shown (with their parameters) and not only the function name like
myFunction( Param1, Param2 )
is shown as
myFunction

I'm working with non-standard programming languages.

Many thanks and greetings
padFox