On Monday, 15 October 2012 at 08:25:18 UTC, Tommi wrote:
in reality, it's very easy to write a bug that makes an enum
variable have an invalid value. E.g:
Writing that bug wasn't as easy as I thought though. Here's the
code with a bug:
enum MyEnum { first, second, third }
auto me = MyEnum.min;
while (me <= MyEnum.max)
{
// do something
++me;
}
final switch (me) // this should throw
{
case MyEnum.first: break;
case MyEnum.second: break;
case MyEnum.third: break;
}
Instead, currently this code runs just fine, none of the switch
cases are taken. So, this bug might manifest itself very far from
where it actually should have been throwing: on that final switch
expression. Thus hunting this bug down could be tedious.
