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-rw-r--r--posix/regex.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/posix/regex.h b/posix/regex.h
index e251962cef..1ab3e243a7 100644
--- a/posix/regex.h
+++ b/posix/regex.h
@@ -170,6 +170,11 @@ typedef unsigned long int reg_syntax_t;
    If not set, then case is significant.  */
 #define RE_ICASE (RE_INVALID_INTERVAL_ORD << 1)
 
+/* This bit is used internally like RE_CONTEXT_INDEP_ANCHORS but only
+   for ^, because it is difficult to scan the regex backwards to find
+   whether ^ should be special.  */
+#define RE_CARET_ANCHORS_HERE (RE_ICASE << 1)
+
 /* This global variable defines the particular regexp syntax to use (for
    some interfaces).  When a regexp is compiled, the syntax used is
    stored in the pattern buffer, so changing this does not affect