On Wednesday, 27 May 2020 at 11:03:51 UTC, BoQsc wrote:
I'm lacking knowledge on how to achieve what I want and getting
an error.
What is the correct way to do what I tried to achieve in this
code?
Everything was intuitive until I started to add notice variable
to the writeln. Rdmd says variable `notice` is shadowing
variable.
if (driveLetter.exists){
auto directory = "/Backup";
if ((driveLetter ~ directory).exists){
auto notice = "Backup directory exists.";
}
writeln(driveLetter, notice);
}
Variables only live in a specified scope, starting from where
they are declared, and ending when they reach the '}' indicating
the end of said scope.
In you case, 'notice' only lives inside the if ((driveLetter ~
directory).exists) scope, and doesn't exist outside. In order to
fix this, you will need to declare it outside:
if (driveLetter.exists) {
auto directory = "/Backup";
auto notice = "Backup directory does not exist.";
if ((driveLetter ~ directory).exists) {
notice = "Backup directory exists.";
}
writeln(driveLetter, notice);
}
This also makes it clearer what value 'notice' will have when the
backup directory doesn't exist - in your case you haven't
assigned it any value in that case.
--
Simen
