Is the following possible in D?  To call a (unary) function f with variable a, and let f print:

> Called with argument named 'a'.

I am of course asking for a generic solution, independent of the actual variable name (in this case, 'a').  I am aware that I am likely asking the impossible because of how the function call mechanism is implemented in most programming languages, hence in D.  Still, it might be possible given D's stong introspection capabilities / traits / pragma's / whathaveyou's.

On Monday, October 19, 2015 04:14 PM, Handyman wrote:

> Is the following possible in D?  To call a (unary) function f
> with variable a, and let f print:
> 
>> Called with argument named 'a'.
> 
> I am of course asking for a generic solution, independent of the actual variable name (in this case, 'a').  I am aware that I am likely asking the impossible because of how the function call mechanism is implemented in most programming languages, hence in D.  Still, it might be possible given D's stong introspection capabilities / traits / pragma's / whathaveyou's.

I think the exact thing you're asking for is not possible.

With slightly different syntax you can do this:
----
module test;
void f(alias v)()
{
    import std.stdio: writeln;
    import std.traits: fullyQualifiedName;
    writeln(v.stringof, " ", fullyQualifiedName!v);
}

void main()
{
    int a;
    f!a(); /* prints "a test.main.a" */
}
----