https://stackoverflow.com/questions/27509061/macro-to-avoid-duplicate-case-value
Someone has already used them in a switch expression... > On May 25, 2018, at 12:45 PM, David Holmes <david.hol...@oracle.com> wrote: > >>> I also wonder whether a smart compiler might not flag code where the errors >>> do infact have the same value: >>> >>> if (errno == 11 || errno == 11) ... >>> >> At least gcc -O completely removes the second redundant test, so no >> observable changes is expected on supported platforms. > > I'm more worried about a new compiler warning - especially if you happened to > use them in a switch! - resulting in future build failures.
