Observe: https://github.com/D-Programming-Language/phobos/pull/3054
Is this change the partial proof of another failure of a part of D language design? What's the point of template constraints? Aren't C++ Concepts better? Or to rephrase that in a less trollish way, can D be enhanced to add user-defined error messages to template constraints, and is such enhancement a good idea?
Bye, bearophile
