On 18 February 2014 09:01, Walter Bright <newshound2@digitalmars.com> wrote:

On 2/17/2014 2:43 PM, Ary Borenszweig wrote:

Now suppose bit_flag can get an additional "new_bit_flag" value. How does
"default" helps me notice that I'm supposed to add it to that switch statement?

Because if you account for all the cases, you write:

default: assert(0);

Now you intentionally tell the user that you intentionally covered all the cases.

I think 'final switch' should do that for you, and by typing final, you've intentionally covered the case. There's no room for mistake then.