(at_begline_loc_p): Also recognize the \\(?:^ case

of an anchor at the beginning of a shy-group.

(at_begline_loc_p): Also recognize the \\(?:^ case
of an anchor at the beginning of a shy-group.
d2af47df · Stefan Monnier · fc6a6a4e · d2af47df · d2af47df
Commit d2af47df authored May 25, 2000 by Stefan Monnier
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src/ChangeLog src/ChangeLog +5 -0

src/regex.c src/regex.c +6 -1

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--- a/src/ChangeLog
+++ b/src/ChangeLog
--- a/src/regex.c
+++ b/src/regex.c
@@ -3208,7 +3208,12 @@ at_begline_loc_p (pattern, p, syntax)
       /* After a subexpression?  */
       (*prev == '(' && (syntax & RE_NO_BK_PARENS || prev_prev_backslash))
       /* After an alternative?	 */
-    || (*prev == '|' && (syntax & RE_NO_BK_VBAR || prev_prev_backslash));
+    || (*prev == '|' && (syntax & RE_NO_BK_VBAR || prev_prev_backslash))
+       /* After a shy subexpression?  */
+    || ((syntax & RE_SHY_GROUPS) && prev - 2 >= pattern
+	&& prev[-1] == '?' && prev[-2] == '('
+	&& (syntax & RE_NO_BK_PARENS
+	    || (prev - 3 >= pattern && prev[-3] == '\\')));
 }