/* Be really agressive about optimising patterns with trie sequences? */
#define PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION 1
+/* Use old style unicode mappings for perl and posix character classes
+ *
+ * NOTE: Enabling this essentially breaks character class matching against unicode
+ * strings, so that POSIX char classes match when they shouldn't, and \d matches
+ * way more than 10 characters, and sometimes a charclass and its complement either
+ * both match or neither match.
+ * NOTE: Disabling this will cause various backwards compatibility issues to rear
+ * their head, and tests to fail. However it will make the charclass behaviour
+ * consistant regardless of internal string type, and make character class inversions
+ * consistant. The tests that fail in the regex engine are basically broken tests.
+ *
+ * Personally I think 5.12 should disable this for sure. Its a bit more debatable for
+ * 5.10, so for now im leaving it enabled.
+ *
+ * -demerphq
+ */
+#define PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS 1
+
/* Should the optimiser take positive assertions into account? */
#define PERL_ENABLE_POSITIVE_ASSERTION_STUDY 0