#ifndef _EXOPT_H
#define _EXOPT_H

#define _EO__OPT_OLD_ASSUME //XXX: __attribute__((gnu::assume(X))) fails to build

#define _EXOPT_INTERNAL_PREFIX _exopt__

#ifdef __cplusplus
#	define _exopt__cpp 1
#	define _exopt__c 1
extern "C" {
#else
#	define _exopt__cpp 0
#	define _exopt__c 1
#endif

#define _EO_PASTE_(x,y) x##y
#define _EO_PASTE(x,y) _EO_PASTE_(x,y)
#define _EO(X) _EO_PASTE(_EXOPT_INTERNAL_PREFIX, X)


#define _exopt__internal __attribute__((visibility("internal")))
#define _exopt__readonly __attribute__((__pure__))
#define _exopt__pure __attribute__((__const__))

#ifdef _EO__OPT_OLD_ASSUME
#	define _EO_ASSUME(X) ({ if(! (X)) __builtin_unreachable(); })
#endif

#if _EO(cpp)
#	ifndef _EO_ASSUME
#		define _EO_ASSUME(X) [[gnu::assume(X)]]
#	endif
#	define _exopt__restrict __restrict__
#else
#	ifndef _EO_ASSUME
#		define _EO_ASSUME(X) __attribute__((assume(X)))
#	endif
#	define _exopt__restrict restrict
#endif

#ifdef __cplusplus
}
#endif

#endif /* _EXOPT_H */