kc3-lang/gnulib

2000-03-29T04:01:25

(analyse_first): New function obtained by ripping out most of re_compile_fastmap and generalizing it a little bit so that it can also just return whether a given (sub)pattern can match the empty string or not. (regex_compile): Use `analyse_first' to decide whether the loop-check needs to be done or not for *, +, *? and +? (the loop check is costly for non-greedy repetition). (re_compile_fastmap): Delegate the actual work to `analyse_first'.