Getting the error from __traits(compiles, ...)

[Walter Bright]

Denis Koroskin wrote:
> He was asking for a string so that it would be possible to parse and/or 
> output. More like:
> 
> enum s = __traits(compiles_or_msg, ...);
> static if (s.length == 0) {
>    // no error
> } else {
>    // do stuff with error message
> }

Makes sense.