Should aliasing a lambda expression be allowed?

[Timon Gehr]

On 15.11.2017 15:07, Jonathan M Davis wrote:
> In general, alias aliases symbols, whereas a lambda isn't a symbol. ...

There is essentially no merit to the symbol/no symbol distinction. It's 
just a DMD implementation detail resulting in weird inconsistencies 
between alias declarations and alias template parameters that are being 
fixed one by one.

> ...
> alias foo = int;
> alias foo = float;

Case in point. Neither int nor float are symbols.