Automatic variable declaration

[Nick Treleaven]

On Wednesday, 15 August 2018 at 16:56:39 UTC, Everlast wrote:
>>> foo(int x = 3);
>>> foo(auto x = 3);
> If one has to declare the type it reduces it's effectiveness.

auto is not a type ;-) Having e.g. auto or a type makes it clear 
that a new variable is being defined. I'd like this to work 
inside a parenthesized expression too, not just for function 
calls.

> since D can infer the type from the function

I think this would complicate function overload resolution. If an 
initial value is required the type can be inferred from that, 
then no changes are needed to overload resolution.