Add new regnode for synthetic start class

This creates a regnode specifically for the synthetic start class, which
is a type of ANYOF node.  The flag bit previously used to denote this is
removed.  This paves the way for this bit to be freed up, but first the
other use of this bit must also be removed, which will be done in the
next commit.

There are now three ANYOF-type regnodes.  This one should be called only
in one place in regexec.c.  The other special one is ANYOF_WARN_SUPER.
A synthetic start class node should not do any warning, so there is no
issue of having something need to be both types.

1 files changed, 1 insertions, 0 deletions

diff --git a/regcomp.sym b/regcomp.sym
index 68182c9e34..4de5d79bf5 100644
--- a/regcomp.sym
+++ b/regcomp.sym
@@ -56,6 +56,7 @@ SANY        REG_ANY,    no 0 S    ; Match any one character.
 CANY        REG_ANY,    no 0 S    ; Match any one byte.
 ANYOF       ANYOF,      sv 0 S    ; Match character in (or not in) this class, single char match only
 ANYOF_WARN_SUPER ANYOF, sv 0 S    ; Match character in (or not in) this class, warn (if enabled) upon matching a char above Unicode max;
+ANYOF_SYNTHETIC ANYOF,  sv 0 S    ; Synthetic start class
 
 # Order of the below is important.  See ordering comment above.
 POSIXD      POSIXD,     none 0 S   ; Some [[:class:]] under /d; the FLAGS field gives which one