pure.h

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#ifndef RBIMPL_ATTR_PURE_H                           /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_ATTR_PURE_H
#include "ruby/internal/compiler_since.h"
#include "ruby/internal/has/attribute.h"
#include "ruby/assert.h"
 
#if RBIMPL_HAS_ATTRIBUTE(pure)
# define RBIMPL_ATTR_PURE() __attribute__((__pure__))
#elif RBIMPL_COMPILER_SINCE(SunPro, 5, 10, 0)
# define RBIMPL_ATTR_PURE() _Pragma("does_not_write_global_data")
#else
# define RBIMPL_ATTR_PURE() /* void */
#endif
 
#if !RUBY_DEBUG
# define RBIMPL_ATTR_PURE_UNLESS_DEBUG() RBIMPL_ATTR_PURE()
#else
# define RBIMPL_ATTR_PURE_UNLESS_DEBUG() /* void */
#endif
 
#endif /* RBIMPL_ATTR_PURE_H */