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Diffstat (limited to 'prism/compiler/fallthrough.h')
| -rw-r--r-- | prism/compiler/fallthrough.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/prism/compiler/fallthrough.h b/prism/compiler/fallthrough.h new file mode 100644 index 0000000000..ce1b450e8a --- /dev/null +++ b/prism/compiler/fallthrough.h @@ -0,0 +1,22 @@ +/** + * @file compiler/fallthrough.h + */ +#ifndef PRISM_COMPILER_FALLTHROUGH_H +#define PRISM_COMPILER_FALLTHROUGH_H + +/** + * We use -Wimplicit-fallthrough to guard potentially unintended fall-through + * between cases of a switch. Use PRISM_FALLTHROUGH to explicitly annotate cases + * where the fallthrough is intentional. + */ +#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L /* C23 or later */ + #define PRISM_FALLTHROUGH [[fallthrough]]; +#elif defined(__GNUC__) || defined(__clang__) + #define PRISM_FALLTHROUGH __attribute__((fallthrough)); +#elif defined(_MSC_VER) + #define PRISM_FALLTHROUGH __fallthrough; +#else + #define PRISM_FALLTHROUGH +#endif + +#endif |