• Handyman (8/9) Oct 19 2015 I am of course asking for a generic solution, independent of the
• anonymous (17/28) Oct 19 2015 I think the exact thing you're asking for is not possible.

Handyman <handyman handyworld.tv> writes:

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.

anonymous <anonymous example.com> writes:

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" */
}
----