1 1 11 Macros for text handling 1 *************************** 1 1 There are a number of builtins in 'm4' for manipulating text in various 1 ways, extracting substrings, searching, substituting, and so on. 1
1 · Len Calculating length of strings · Index macro Searching for substrings · Regexp Searching for regular expressions · Substr Extracting substrings · Translit Translating characters · Patsubst Substituting text by regular expression · Format Formatting strings (printf-like) 1