Simple implementation of __FUNCTION

[Alex Rønne Petersen]

On 02-11-2012 18:31, Rob T wrote:
> Thanks to input from the D community, I've managed to implement a
> reasonable way to log the name of a calling function. This is used for
> basic execution monitoring and for automated logging of exception errors.
>
> Here's what I did.
>
> template __FUNCTION()
> {
>     const char[] __FUNCTION = "__traits(identifier, __traits(parent, {}))";
> }
>
> Example use in code:
>
> throw new Exception( "Error: Function ", mixin(__FUNCTION!()) );
>
> writefln( "File: %s, Func: %s, Line: %d", __FILE__,
> mixin(__FUNCTION!()), __LINE__ );
>
>
> The ONLY thing left that I would like to have, is ability to display the
> function signature along with the name. The signature will be very
> useful to show which version of an overloaded or templated function was
> called.
>
> If anyone can suggest imporvements, like how to get rid of need to
> explicitly call mixin, and better yet a solution to get the function
> signature, please post away. Thanks!
>
> I have to mention that we need a real solution that can only be provided
> through improved reflection support, eg __scope.function, __scope.line,
> __scope.file, etc, or whatever the D community thinks will fit in best.
>
> --rt
>
>

You should totally submit this for inclusion into std.traits in Phobos.

(Though, to follow naming conventions, it should be functionName and 
functionSignature or so.)

-- 
Alex Rønne Petersen
alex at lycus.org
http://lycus.org