parser.h: Comment that lex_expect is unused

There is at least one CPAN module (Data::Alias) that assigns to this.
Removing it won’t shrink the parser struct because of alignment, so
it doesn’t gain us anything.  Just leave it for now.  We can remove
it later if we have to.

1 files changed, 1 insertions, 1 deletions

diff --git a/parser.h b/parser.h
index 75f676c1b1..11367b6c68 100644
--- a/parser.h
+++ b/parser.h
@@ -56,7 +56,7 @@ typedef struct yy_parser {
     U8		lex_defer;	/* state after determined token */
     U8		lex_dojoin;	/* doing an array interpolation
 				   1 = @{...}  2 = ->@ */
-    U8		lex_expect;	/* expect after determined token */
+    U8		lex_expect;	/* UNUSED */
     U8		expect;		/* how to interpret ambiguous tokens */
     I32		lex_formbrack;	/* bracket count at outer format level */
     OP		*lex_inpat;	/* in pattern $) and $| are special */