Re: scope(exit) considered harmful

[Walter Bright]

Justin Johansson wrote:

Long ago in the days before D, I was used to commenting out code with one of
two idioms:

#if false
.. this code is not compiled
#endif

or

if (false) {
.. this code is compiled but not executed
}

and to turn stuff back on again:

#if true
.. this code is back on now
#endif

or

if (true) {
.. this code is back on now too
}

but in the D world beware the Ides of Scopes because if your curly
brace block with the true/false conditional contains a scope(exit)
you will get explainable but unexpected behaviour if this code
is enabled inside an if(true) block.

Gotcha.

This is incorrect. Given:

    if (false)
    {
          scope(exit) writeln("hello world!");
    }

The writeln will never execute.