ref: a70ecba06f804990400326d0df079cd41e2ef096
dir: /include/helpers.h/
/* * This file is part of RGBDS. * * Copyright (c) 2014-2020, RGBDS contributors. * * SPDX-License-Identifier: MIT */ #ifndef HELPERS_H #define HELPERS_H // Of course, MSVC does not support C11, so no _Noreturn there... #ifdef _MSC_VER #define _Noreturn __declspec(noreturn) #endif // Ideally, we'd use `__has_attribute` and `__has_builtin`, but these were only introduced in GCC 9 #ifdef __GNUC__ // GCC or compatible #define format_(archetype, str_index, first_arg) \ __attribute__ ((format (archetype, str_index, first_arg))) // In release builds, define "unreachable" as such, but trap in debug builds #ifdef NDEBUG #define unreachable_ __builtin_unreachable #else #define unreachable_ __builtin_trap #endif #else // Unsupported, but no need to throw a fit #define format_(archetype, str_index, first_arg) // This seems to generate similar code to __builtin_unreachable, despite different semantics // Note that executing this is undefined behavior (declared _Noreturn, but does return) static inline _Noreturn unreachable_(void) {} #endif // Macros for stringification #define STR(x) #x #define EXPAND_AND_STR(x) STR(x) #endif /* HELPERS_H */