maybe_unused.h

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#ifndef RBIMPL_ATTR_MAYBE_UNUSED_H                   /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_ATTR_MAYBE_UNUSED_H
#include "ruby/internal/has/attribute.h"
#include "ruby/internal/has/c_attribute.h"
#include "ruby/internal/has/cpp_attribute.h"

#if RBIMPL_HAS_CPP_ATTRIBUTE(maybe_unused)
# define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
#elif RBIMPL_HAS_C_ATTRIBUTE(maybe_unused)
# define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
#elif RBIMPL_HAS_ATTRIBUTE(unused)
# define RBIMPL_ATTR_MAYBE_UNUSED() __attribute__((__unused__))
#else
# define RBIMPL_ATTR_MAYBE_UNUSED() /* void */
#endif
 
#endif /* RBIMPL_ATTR_MAYBE_UNUSED */