[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [creduce-dev] unifdef

Hi John,

Your guess is right, I am interested in a reduced example outlining the different behaviour of template instantiation/specialization in clang vs gcc leading to the error. So yes the test should look for the specific clang error message "error: no matching function for call to 'get'" while gcc is OK with the code. Sorry for not writing this.

I'm not sure about the -w, though. The original code compiles without any warning on gcc so ideally this behaviour should be kept in the reduced example. It may make reducing much harder, though, so we could probably start with -w and see how it goes.


2015-11-01 1:19 GMT+02:00 John Regehr <regehr@cs.utah.edu>:
Well, I probably did something wrong but using this interestingness test:

g++ -c -std=c++11 -fsyntax-only incremental_components.cpp -w &&
! clang++ -c -std=c++11 -fsyntax-only incremental_components.cpp -w

C-Reduce rather quickly came up with this:

constexpr int x0() { return __builtin_tanhl(0); }

Do you have a better interestingness test for me?  Should I be looking for a specific error message from clang++ I guess?