utf8.h: Parenthesize macro parameter

[perl5.git] / cv.h

diff --git a/cv.h b/cv.h
index 3d44a73..5da9a50 100644 (file)
--- a/cv.h
+++ b/cv.h
@@ -202,6 +202,15 @@ CvNAME_HEK(CV *sv)
        ? ((XPVCV*)MUTABLE_PTR(SvANY(sv)))->xcv_gv_u.xcv_hek
        : 0;
 }
+/* This lowers the refernce count of the previous value, but does *not*
+   increment the reference count of the new value. */
+#define CvNAME_HEK_set(cv, hek) ( \
+       CvNAME_HEK((CV *)(cv))                                           \
+           ? unshare_hek(SvANY((CV *)(cv))->xcv_gv_u.xcv_hek)    \
+           : (void)0,                                             \
+       ((XPVCV*)MUTABLE_PTR(SvANY(cv)))->xcv_gv_u.xcv_hek = (hek), \
+       CvNAMED_on(cv)                                               \
+    )
 
 /*
 =head1 CV reference counts and CvOUTSIDE