Bill Baxter: > The good thing is that since most of the machinery is there, the > actual compiler changes required would mostly be just rewrites of new > syntax in terms of existing functionality.
I agree, this looks like something that can be added to D even after D2 comes out of alpha. But Andrei warns us that here it's easy to overdo the design. So I think that keeping usability low (= keeping things handmade and low-tech) can be better than a Byzantine and limited design. > In particular there's not a good way for the compiler to give good > error messages about why a concept is not satisfied by a particular > type. Time ago I have asked for a "small" compiler feature: when a function/class template creates a compile-time error (because some of the code inside it is not compatible with the specific type given to the template) I'd like the D compiler to act as GCC, telling me not just where there is the error inside the template, but also and *before* that error message to show me the line of where the template is instantiated. This is another small feature that can be added after D2 "finalization". Bye, bearophile
