Hi! I’m looking for a #if guard to enable/disable code using concepts-lite. The compiler version does not suffice, as it depends on -std=c++1z. Also, the documentation about concepts seems to be about the previous attempts at concepts. https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Concepts.html#C_002b_002b-Concepts And actually, I did not find the documentation for c++1z, nor even -std=c++14. https://gcc.gnu.org/onlinedocs/gcc/Standards.html#index-std-60 Finally, one would expect to see documentation about -std in "Options Controlling C++ Dialect", since the corresponding about C documents -std for C. https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html#C_002b_002b-Dialect-Options Thanks!
