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| author | Brian Fraser <fraserbn@gmail.com> | 2012-01-12 17:22:05 -0300 |
|---|---|---|
| committer | Karl Williamson <public@khwilliamson.com> | 2012-01-29 10:07:40 -0700 |
| commit | 838f2281125c4e0f98e5d741f9058f09c8242d33 (patch) | |
| tree | 6fa3458446be72105180d95d66cf87a1d3b7cf3b /regen/opcodes | |
| parent | 2a4315f8fb099a3fd3bbd5d9994af3919a6c5b05 (diff) | |
| download | perl-838f2281125c4e0f98e5d741f9058f09c8242d33.tar.gz | |
Implement the fc keyword and the \F string escape.
Along with the simple_casefolding and full_casefolding features.
fc() stands for foldcase, a sort of pseudo case (like lowercase),
which is used to implement Unicode casefolding. It maps a string
to a form where all case differences are erased, so it's a
locale-independent way of checking if two strings are the same,
regardless of case.
This functionality was, and still is, available through the
regular expression engine -- /i matches would use casefolding
internally. The fc keyword merely exposes this for easier access.
Previously, one could attempt to case-insensitively test two strings
for equality by doing
lc($a) eq lc($b)
But that might get you wrong results, for example in the case of
\x{DF}, LATIN SMALL LETTER SHARP S.
Diffstat (limited to 'regen/opcodes')
| -rw-r--r-- | regen/opcodes | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/regen/opcodes b/regen/opcodes index 23f6d2852a..22cc9133fd 100644 --- a/regen/opcodes +++ b/regen/opcodes @@ -545,3 +545,6 @@ rvalues values on reference ck_each t% S coreargs CORE:: subroutine ck_null $ runcv __SUB__ ck_null s0 + +# fc and \F +fc fc ck_fun fstu% S? |