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-rw-r--r--include/ruby/internal/attr/nonnull.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/ruby/internal/attr/nonnull.h b/include/ruby/internal/attr/nonnull.h
index cfced0bf74..778d5be208 100644
--- a/include/ruby/internal/attr/nonnull.h
+++ b/include/ruby/internal/attr/nonnull.h
@@ -17,7 +17,7 @@
* recursively included from extension libraries written in C++.
* Do not expect for instance `__VA_ARGS__` is always available.
* We assume C99 for ruby itself but we don't assume languages of
- * extension libraries. They could be written in C++98.
+ * extension libraries. They could be written in C++98.
* @brief Defines #RBIMPL_ATTR_NONNULL.
*/
#include "ruby/internal/has/attribute.h"
@@ -25,8 +25,10 @@
/** Wraps (or simulates) `__attribute__((nonnull))` */
#if RBIMPL_HAS_ATTRIBUTE(nonnull)
# define RBIMPL_ATTR_NONNULL(list) __attribute__((__nonnull__ list))
+# define RBIMPL_NONNULL_ARG(arg) RBIMPL_ASSERT_NOTHING
#else
# define RBIMPL_ATTR_NONNULL(list) /* void */
+# define RBIMPL_NONNULL_ARG(arg) RUBY_ASSERT(arg)
#endif
#endif /* RBIMPL_ATTR_NONNULL_H */