Re: iterate over enum name:value pairs

[bearophile]

Jay Norwood:

    struct Suit {string nm; int val; int val2; string shortNm;};

You have missed my suggestions above regarding the struct :-)

Look at this:


void main() {
    int x;
    struct Foo1 {
        int bar1() { return x; }
    }
    pragma(msg, Foo1.sizeof);
    static struct Foo2 {
        // this gives an error
        int bar2() { return x; }
    }
    pragma(msg, Foo2.sizeof);
}


bar2() gives an error because it can't access x. If you comment 
out the bar2 line, the output is:

4u
1u

Usually you don't want your struct defined inside a function to 
contain a pointer to the enclosing function.




    static Suit[5] suits =  [
                {"spades",1,6,"spd"},
                {"hearts",4,10,"hrt"},
                {"hearts2",4,10,"hrt2"},
                {"diamonds",10,16,"dmd"},
                {"clubs",11,17,"clb"}
                ];

Unless you have to mutate the contents of a variable, like your 
suits, define it const or immutable:

      static immutable Suit[5] suits =  [
               {"spades",1,6,"spd"},
              ...
             ];

Generally in D add const/immutable to all variables that you 
don't need to mutate, if/where you can.

Bye,
bearophile