On Sunday, 9 July 2017 at 17:13:11 UTC, Dukc wrote:
To answer the part "why" about them sucking, is that they are generic.
Eh, that's not really why... this is just a crappy implementation. We can do a lot better with the library and a lot better with the compiler without losing any of the genericness.
Were join() just a regular function taking two strings, or two interfaces which string would implement, the messages would be better.
Better yes, but still actually a bit crappy. I have one step of an improvement in the works: https://github.com/dlang/dmd/pull/6806
Consider something similar to that for the constraints too. It could highlight that you passed a string instead of a "range of ranges" and you'd have a pretty good idea at a glance, even with the generic templates.
About C++ from what I've heard, generic error messages there are not only much worse than others, they are much worse than even D template errors!
Indeed.
