Compile time foreach with switch

[Adam D. Ruppe via Digitalmars-d-learn]

On Friday, 21 April 2017 at 19:09:25 UTC, Johan Fjeldtvedt wrote:
> void foo(string s) {
>     enum es = tuple("a", "b", "c");
>     switch (s) {
>       foreach (e; es) {
>         case e:
>             writeln("matched ", e);
>             break;
>       }

Let me remove some surrounding stuff and ask you what happens:

        foreach (e; es) {
          if(s == c) {
              writeln("matched ", e);
              break;
          }
        }


What does that break do?


Then realize that it does exactly the same thing when it is 
inside a switch... it always breaks the innermost thing, which 
happens to be this loop. (note that cases are not `breaked`, the 
switch is.)