https://issues.dlang.org/show_bug.cgi?id=24876

          Issue ID: 24876
           Summary: Undocumented cast from slice to static array
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dlang.org
          Assignee: nobody@puremagic.com
          Reporter: nick@geany.org

E.g.:

        void f(int[] b)
        {
            char[4] a;
            a = cast(char[4]) b[0..1]; // OK
            const i = 1;
            a = cast(char[4]) b[i..2]; // OK
        }

PR incoming.

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