Small @nogc experience report

[Walter Bright]

On 9/19/2018 10:13 AM, Shachar Shemesh wrote:
>    assert(condition, string); // string is useless without actual info about 
> what went wrong.
>    assert(condition, format(string, arg, arg)); // No good - format is not @nogc

Another method:

   debug
     assert(condition, format(string, arg, arg));
   else
     assert(condition, string);

because @nogc is ignored in debug conditionals, just like purity is ignored in 
debug conditionals.