Re: Get function argument name?

[JN via Digitalmars-d-learn]

On Sunday, 4 March 2018 at 21:12:44 UTC, arturg wrote:

you can pass it by alias:

import std.stdio;

void main(string[] args)
{
    int x;
    printName!(x);
}

void printName(alias var)()
{
    writeln(__traits(identifier, var), " ", var);
}

Well, it works. But I am confused now, why. Isn't alias only for 
types (like a typedef)? Why can we use it for variable here?