diff options
Diffstat (limited to 'regen')
| -rw-r--r-- | regen/regcharclass_multi_char_folds.pl | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/regen/regcharclass_multi_char_folds.pl b/regen/regcharclass_multi_char_folds.pl index 7a4c2a6d96..caee865069 100644 --- a/regen/regcharclass_multi_char_folds.pl +++ b/regen/regcharclass_multi_char_folds.pl @@ -15,12 +15,19 @@ use Unicode::UCD "prop_invmap"; # this code is designed to help regcomp.c, and EXACTFish regnodes. For # non-UTF-8 patterns, the strings are not folded, so we need to check for the # upper and lower case versions. For UTF-8 patterns, the strings are folded, -# so we only need to worry about the fold version. There are no non-ASCII -# Latin1 multi-char folds currently, and none likely to be ever added. Thus -# the output is the same as if it were just asking for ASCII characters, not -# full Latin1. Hence, it is suitable for generating things that match -# EXACTFA. It does check for and croak if there ever were to be an upper -# Latin1 range multi-character fold. +# except in EXACTFL nodes) so we only need to worry about the fold version. +# All folded-to characters in non-UTF-8 (Latin1) are members of fold-pairs, +# at least within Latin1, 'k', and 'K', for example. So there aren't +# complications with dealing with unfolded input. That's not true of UTF-8 +# patterns, where things can get tricky. Thus for EXACTFL nodes where things +# aren't all folded, code has to be written specially to handle this, instead +# of the macros here being extended to try to handle it. +# +# There are no non-ASCII Latin1 multi-char folds currently, and none likely to +# be ever added. Thus the output is the same as if it were just asking for +# ASCII characters, not full Latin1. Hence, it is suitable for generating +# things that match EXACTFA. It does check for and croak if there ever were +# to be an upper Latin1 range multi-character fold. # # This is designed for input to regen/regcharlass.pl. |