On Tuesday, 21 April 2020 at 14:43:04 UTC, Jean-Louis Leroy wrote:
I wonder if templates are lazily expanded. I haven't looked at
the compiler's code, my guess is: maybe not.
If the template gets used it gets instantiated (and cached).
if not than not.
you can use the -vcg-ast switch to look at how your souce code
looks "expandend".
If these techniques get traction, it will incite compiler
developers to improve template instantiation, hopefully.
They already gained traction, unfortunately.
Making this system fast is not easy. And will need a few language
changes, and some work from users (programmers) as well.
