================ @@ -760,8 +760,9 @@ KEYWORD(__builtin_available , KEYALL) KEYWORD(__builtin_sycl_unique_stable_name, KEYSYCL) // Keywords defined by Attr.td. +// The "EMPTY ## X" is used to prevent early macro-expansion of the keyword. #ifndef KEYWORD_ATTRIBUTE -#define KEYWORD_ATTRIBUTE(X, ...) KEYWORD(X, KEYALL) +#define KEYWORD_ATTRIBUTE(X, HASARG, EMPTY) KEYWORD(EMPTY ## X, KEYALL) ---------------- nikic wrote:
Macros don't get expanded in `##` so this will produce something like `EMPTY__arm_streaming`. I believe the only way to actually get an empty concatenation is via an empty macro argument. Here's a godbolt to experiment: https://cpp.godbolt.org/z/d9zc7hs3a https://github.com/llvm/llvm-project/pull/78704 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
