ellipsis-error.h

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#ifndef ELLIPSIS_ERROR_H
#define ELLIPSIS_ERROR_H
 
#ifdef __is_identifier
# if __is_identifier(constexpr)
# warning "constexpr keyword is not supported, emulating as static const"
# define constexpr static const
# endif
#endif
 
#ifndef __STRINGIFY__
# define __STRINGIFY__(...) #__VA_ARGS__
#endif
 
extern bool ellipsis‿error‿dump;
extern bool ellipsis‿error‿verb;
extern _Atomic bool ellipsis‿error‿finished;
 
#if __has_c_attribute(__gnu__::__format__)
# define GNU_ATTR_FORMAT_PRINTF(...) [[__gnu__::__format__(__printf__, __VA_ARGS__)]]
#else
# define GNU_ATTR_FORMAT_PRINTF(...)
#endif
#if __has_c_attribute(__gnu__::__returns_nonnull__)
# define GNU_ATTR_RETURNS_NONNULL [[__gnu__::__returns_nonnull__]]
#else
# define GNU_ATTR_RETURNS_NONNULL
#endif
#if __has_c_attribute(__gnu__::__used__)
# define GNU_ATTR_USED [[__gnu__::__used__]]
#else
# define GNU_ATTR_USED
#endif
#if __has_c_attribute(__gnu__::__malloc__)
# define GNU_ATTR_MALLOC(...) [[__gnu__::__malloc__ __VA_OPT__((__VA_ARGS__))]]
#else
# define GNU_ATTR_MALLOC(...)
#endif
#if __has_c_attribute(__gnu__::__access__)
# define GNU_ATTR_ACCESS(...) [[__gnu__::__access__(__VA_ARGS__)]]
#else
# define GNU_ATTR_ACCESS(...)
#endif
#if __has_c_attribute(__gnu__::__strict_flex_array__)
# define GNU_ATTR_STRICT_FLEX_ARRAY(...) [[__gnu__::__strict_flex_array__(__VA_ARGS__)]]
#else
# define GNU_ATTR_STRICT_FLEX_ARRAY(...)
#endif
#if __has_c_attribute(__gnu__::__counted_by__)
# define GNU_ATTR_COUNTED_BY(...) [[__gnu__::__counted_by__(__VA_ARGS__)]]
#else
# define GNU_ATTR_COUNTED_BY(...)
#endif
#if __has_c_attribute(__nodiscard__) >= 202003L
# define STDC_ATTR_NODISCARD(...) [[__nodiscard__ __VA_OPT__((__VA_ARGS__))]]
#elif __has_c_attribute(__nodiscard__)
# define STDC_ATTR_NODISCARD(...) [[__nodiscard__]]
#elif __has_c_attribute(__gnu__::__warn_unused_result__)
# define STDC_ATTR_NODISCARD(...) [[__gnu__::__warn_unused_result__]]
#else
# define STDC_ATTR_NODISCARD(...)
#endif
 
GNU_ATTR_FORMAT_PRINTF(1, 2)
[[noreturn]]
void ellipsis‿error(char const __LOC_ID_0_1[], ...);
 
#define ELLIPSIS_ERROR(FORMAT, ...) ellipsis‿error("error, " FORMAT "\n" __VA_OPT__(,) __VA_ARGS__)
 
#define ELLIPSIS_BUG(FORMAT, ...) ellipsis‿error("error, " FORMAT "\n" __VA_OPT__(,) __VA_ARGS__)
 
GNU_ATTR_FORMAT_PRINTF(1, 2)
void ellipsis‿error‿warning(char const __LOC_ID_0_2[], ...);
 
#define ELLIPSIS_WARNING(FORMAT, ...) ellipsis‿error‿warning("warning, " FORMAT "\n" __VA_OPT__(,) __VA_ARGS__)
 
GNU_ATTR_FORMAT_PRINTF(1, 2)
void ellipsis‿error‿diagnostic(char const __LOC_ID_0_3[], ...);
 
#define ELLIPSIS_DIAGNOSTIC(FORMAT, ...) ellipsis‿error‿diagnostic("diagnostic, " FORMAT "\n" __VA_OPT__(,) __VA_ARGS__)
 
GNU_ATTR_FORMAT_PRINTF(1, 2)
void ellipsis‿error‿deadend(char const __LOC_ID_0_4[], ...);
 
#define ELLIPSIS_ERROR_CHECK(F, MESSAGE, ...) \
({\
 auto __LOC_ID_1_1  = F(__VA_ARGS__); \
 if (!__LOC_ID_1_1) {\
 ELLIPSIS_ERROR(__FILE__ ":" __STRINGIFY__(__LINE__) ": " MESSAGE); \
 } \
 __LOC_ID_1_1; \
 })
 
#ifndef _Lengthof
 
#define _Lengthof(A) \
_Generic(&(typeof(&((A)[0]))){}, \
 typeof(A)*: (struct {\
 static_assert(_Generic(&(typeof(&((A)[0]))){}, typeof(A)*: false, default: true), \
 "_Lengthof needs an array parameter"); \
 size_t _z; \
 }){}._z, \
 default: sizeof(A)/sizeof((A)[0]))
#endif
 
#endif