#define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */
#define G_NODEBUG 32 /* Disable debugging at toplevel. */
+/* flag bits for PL_in_eval */
+#define EVAL_NULL 0 /* not in an eval */
+#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
+#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
+#define EVAL_KEEPERR 4 /* set by perl_call_sv if G_KEEPERR */
+
/* Support for switching (stack and block) contexts.
* This ensures magic doesn't invalidate local stack and cx pointers.
*/