Error deducing function

[Ignacious via Digitalmars-d]

On Friday, 13 January 2017 at 22:57:09 UTC, Adam D. Ruppe wrote:
> On Friday, 13 January 2017 at 22:22:12 UTC, Ignacious wrote:
>> Like, which arguments actually pass and which ones fail, etc.
>
> Yes, I agree entirely. This would be a HUGE usability bonus, 
> far better than most the other things people work on...

And it should be very simple to do. as the compiler checks the 
arguments it reaches the argument that it finds invalid and it 
simply has to calculate the length in to the string to put 
something like a >> in front of the argument in the error string. 
Or simply give the index in to the argument or template list.

Probably take a good programmer less than an hour to do.