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authorBrian Fraser <fraserbn@gmail.com>2012-01-12 17:22:05 -0300
committerKarl Williamson <public@khwilliamson.com>2012-01-29 10:07:40 -0700
commit838f2281125c4e0f98e5d741f9058f09c8242d33 (patch)
tree6fa3458446be72105180d95d66cf87a1d3b7cf3b /keywords.c
parent2a4315f8fb099a3fd3bbd5d9994af3919a6c5b05 (diff)
downloadperl-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 'keywords.c')
-rw-r--r--keywords.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/keywords.c b/keywords.c
index 169a41c411..23d550df83 100644
--- a/keywords.c
+++ b/keywords.c
@@ -51,7 +51,7 @@ Perl_keyword (pTHX_ const char *name, I32 len, bool all_keywords)
goto unknown;
}
- case 2: /* 18 tokens of length 2 */
+ case 2: /* 19 tokens of length 2 */
switch (name[0])
{
case 'd':
@@ -70,6 +70,14 @@ Perl_keyword (pTHX_ const char *name, I32 len, bool all_keywords)
goto unknown;
+ case 'f':
+ if (name[1] == 'c')
+ { /* fc */
+ return (all_keywords || FEATURE_FC_IS_ENABLED ? -KEY_fc : 0);
+ }
+
+ goto unknown;
+
case 'g':
switch (name[1])
{
@@ -3441,5 +3449,5 @@ unknown:
}
/* Generated from:
- * 29732a698b229f9e5f475fbb191f71c335c9e8d05b6168fe29e61c34c4f10bd2 regen/keywords.pl
+ * e5a540774760ea54c761ef17ee4a153cc264e9a700b817d561e390730c457406 regen/keywords.pl
* ex: set ro: */