include/ruby/backward/2/r_cast.h: deprecate

Remove all usages of RCAST() so that the header file can be excluded
from ruby/ruby.h's dependency.

1 files changed, 2 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index f1232d3aec..102b618180 100644
--- a/gc.c
+++ b/gc.c
@@ -536,6 +536,8 @@ struct RMoved {
     } as;
 };
 
+#define RMOVED(obj) ((struct RMoved *)(obj))
+
 #if defined(_MSC_VER) || defined(__CYGWIN__)
 #pragma pack(push, 1) /* magic for reducing sizeof(RVALUE): 24 -> 20 */
 #endif