Simple implementation of __FUNCTION

[mist]

Sweet! You may also find my pull request for phobos ( #863, 
fullyQualifiedTypename ) useful for adding function signature 
once it gets finalised and merged.

On Friday, 2 November 2012 at 17:31:55 UTC, 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