On Mon, 30 May 2011 20:43:18 -0400, bearophile <bearophileh...@lycos.com>
wrote:
Jesse Phillips:
The purpose is commenting out code, but note that there is also
version(none) { } which is never compiled in.
version(none) {} is probably the official way to comment out code.
And if you use a versioning system to keep your code, then commenting
out code is not a so wise thing to do.
I would add that there is a huge difference between version(none) and
commenting -- version(none) code must still parse, whereas commenting out
code is more flexible.
For example:
for(int i = 0; i < 100; i++)
if(x == i)
{
writeln("found x")
if(y == i)
writeln("x and y are the same!");
}
if you want to just comment out the if(x == i) line, using version(none)
is not going to work well.
I would say that commenting out to test things is acceptable, but
version(none) should be used when code is to be turned off long-term.
-Steve
