Tagged Questions

7
votes
1answer
379 views

string manipulation and catcodes

I want to detect whether an input line contains a certain substring, similar to the problem discussed here: Check if a string contains a given character The complicating problem is that the match ...
5
votes
2answers
148 views

Changing catcode for commercial at (@) inside a macro to get it matched in pattern.

This question is related to TikZ: pgfutil-common: pgfutil@in@ - how does it work? and is a result of coping with that problem. I've already read How to change #catcode in a macro, but it didn't help ...