The problem that took him 5 years to fix in C++, I solved in a minute with D

[zjh]

On Thursday, 10 March 2022 at 20:25:12 UTC, H. S. Teoh wrote:
> 

`D` has no `C++`'s collapse expression.
And It is orthogonal to the '[]' index. Why not add it in d?
`...` Folding expression, is very powerful.
With its help, they can complete powerful metaprogramming like d.