Is there a way to do the following lazily:

writelnIfNotEmpty(T)(T a){

auto b=text(a);

if(b.length)

writeln(b);

}

ie, without using std.conv.text (which needlessly computes an intermediate string, which could be quite large) or launching a separate process ?

writelnIfNotEmpty(""); //doesn't print new line

writelnIfNotEmpty("a"); //prints "a\n"