function argument for map: why shorter form does not compile?

[monkyyy]

On Saturday, 20 June 2026 at 21:21:32 UTC, Ivan Kazmenko wrote:
> 
> 2. Better, on the compiler side, do a lowering of every 
> multi-argument template into a chain of nested single-argument 
> templates.

that would be a major breaking change of overload behavior