regex: Fix some tricky fold problems

As described in the comments, this changes the design of handling the
Unicode tricky fold characters to not generate a node for each possible
sequence but to get them to work within EXACTFish nodes.

The previous design(s) all used a node to handle these, which suffers
from the downfall that it precludes legitimate matches that would cross
the node boundary.

The new design is described in the comments.

1 files changed, 1 insertions, 0 deletions

diff --git a/regcomp.h b/regcomp.h
index 0540c637c0..e1e9fdb22b 100644
--- a/regcomp.h
+++ b/regcomp.h
@@ -494,6 +494,7 @@ struct regnode_charclass_class {
 #define REG_SEEN_VERBARG        0x00000080
 #define REG_SEEN_CUTGROUP       0x00000100
 #define REG_SEEN_RUN_ON_COMMENT 0x00000200
+#define REG_SEEN_EXACTF_SHARP_S 0x00000400
 
 START_EXTERN_C