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Add YS_FALLTHROUGH macro to mark case fall-through

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C++17 introduced [[fallthrough]], GCC and clang had their own vendored
attributes before that. MSVC doesn't seem to have such a warning at all.
This commit is contained in:
Xiretza 2020-05-04 21:12:30 +02:00
parent a299e606f8
commit 695150b037
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5 changed files with 23 additions and 6 deletions
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10
kernel/yosys.h
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@ -155,6 +155,16 @@ extern Tcl_Obj *Tcl_ObjSetVar2(Tcl_Interp *interp, Tcl_Obj *part1Ptr, Tcl_Obj *p
# define YS_NORETURN
#endif
#if __cplusplus >= 201703L
# define YS_FALLTHROUGH [[fallthrough]];
#elif defined(__GNUC__)
# define YS_FALLTHROUGH [[gnu::fallthrough]];
#elif defined(__clang__)
# define YS_FALLTHROUGH [[clang::fallthrough]];
#else
# define YS_FALLTHROUGH
#endif
YOSYS_NAMESPACE_BEGIN
// Note: All headers included in hashlib.h must be included