/* cv.h
*
- * Copyright (c) 1991-2002, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
+ * 2000, 2001, 2002, 2003, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
-/* This structure much match XPVCV in B/C.pm and the beginning of XPVFM
+/* This structure must match XPVCV in B/C.pm and the beginning of XPVFM
* in sv.h */
struct xpvcv {
#define CVf_CLONED 0x0002 /* a clone of one of those */
#define CVf_ANON 0x0004 /* CvGV() can't be trusted */
#define CVf_OLDSTYLE 0x0008
-#define CVf_UNIQUE 0x0010 /* can't be cloned */
+#define CVf_UNIQUE 0x0010 /* sub is only called once (eg PL_main_cv,
+ * require, eval). Not to be confused
+ * with the GVf_UNIQUE flag associated
+ * with the :unique attribute */
#define CVf_NODEBUG 0x0020 /* no DB::sub indirection for this CV
(esp. useful for special XSUBs) */
#define CVf_METHOD 0x0040 /* CV is explicitly marked as a method */
#define CVf_LVALUE 0x0100 /* CV return value can be used as lvalue */
#define CVf_CONST 0x0200 /* inlinable sub */
#define CVf_WEAKOUTSIDE 0x0400 /* CvOUTSIDE isn't ref counted */
+#define CVf_ASSERTION 0x0800 /* CV called only when asserting */
/* This symbol for optimised communication between toke.c and op.c: */
-#define CVf_BUILTIN_ATTRS (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)
+#define CVf_BUILTIN_ATTRS (CVf_METHOD|CVf_LOCKED|CVf_LVALUE|CVf_ASSERTION)
#define CvCLONE(cv) (CvFLAGS(cv) & CVf_CLONE)
#define CvCLONE_on(cv) (CvFLAGS(cv) |= CVf_CLONE)
#define CvLVALUE_on(cv) (CvFLAGS(cv) |= CVf_LVALUE)
#define CvLVALUE_off(cv) (CvFLAGS(cv) &= ~CVf_LVALUE)
+#define CvASSERTION(cv) (CvFLAGS(cv) & CVf_ASSERTION)
+#define CvASSERTION_on(cv) (CvFLAGS(cv) |= CVf_ASSERTION)
+#define CvASSERTION_off(cv) (CvFLAGS(cv) &= ~CVf_ASSERTION)
+
#define CvEVAL(cv) (CvUNIQUE(cv) && !SvFAKE(cv))
#define CvEVAL_on(cv) (CvUNIQUE_on(cv),SvFAKE_off(cv))
#define CvEVAL_off(cv) CvUNIQUE_off(cv)