Scriptlike v0.9.4 - Perl-like interpolated strings, full examples and more.

[Nick Sabalausky via Digitalmars-d-announce]

On 09/23/2015 01:44 AM, Sönke Ludwig wrote:
>
> An alternative idea would be to mix in a local "writeln" function, which
> can then be used multiple times without syntax overhead:
>
> mixin template interp()
> {
>      void iwriteln(string str)()
>      {
>          // pretend that we actually parse the string ;)
>          write("This is ");
>          write(somevar);
>          writeln(".");
>      }
> }
>
> void main()
> {
>      int somevar = 42;
>      mixin interp;
>      iwriteln!("This is ${somevar}.");
> }
>

Hmm, interesting idea. I'd leave it as a string-returning function, 
rather than automatically printing, but a writeln convenience wrapper is 
a nice idea too.

The one problem I'm seeing with it though, is it wouldn't be able to see 
symbols declared between the "mixin interp;" and any later uses of it. Ie:

void main()
{
     int somevar = 42;
     mixin interp;
     iwriteln!("This is ${somevar}.");

     int another = 17;
     iwriteln!("This won't work, using ${another}.");
}

Seems like it would be too awkward and confusing to be worthwhile. :(