https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104640
Paco Arjonilla <pacoarjonilla at yahoo dot es> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pacoarjonilla at yahoo dot es --- Comment #2 from Paco Arjonilla <pacoarjonilla at yahoo dot es> --- Here is another test case with macros. ``` #define MACRO(suffix) \ double operator "" _##suffix (long double arg) \ { return arg; }\ double operator ""_##suffix (long long unsigned arg) \ { return arg; } MACRO(km) MACRO(m) MACRO(mm) MACRO(µm) // <-- COMPILATION ERROR (should compile) ```