source: libcfa/src/enum.hfa @ 983f486

#pragma once

forall(T) { // T is the based type of enum(T)
    forall(E) trait Bounded {
        E lowerBound();
        E upperBound();
    };

    forall(E| Bounded(E, T)) trait Serial {
        unsigned fromInstance(E e);
        E fromInt(unsigned i);
        E succ(E e);
        E pred(E e);
    };

    // Opague Enum + TypedEnum
    forall(E | Serial(E, T)) trait CfaEnum { 
        char * labelE(E e);
        unsigned int posE(E e);
    };

    forall(E | CfaEnum(E, T)) trait TypedEnum {
        T valueE(E e);
    };
}

forall(E, T| TypedEnum(E, T)) {
    // comparison
    int ?==?(E l, E r);
    int ?!=?(E l, E r);
    int ?!=?(E l, zero_t);
    int ?<?(E l, E r);
    int ?<=?(E l, E r);
    int ?>?(E l, E r);
    int ?>=?(E l, E r);

    // for testing; To be removed
    // char * typeEnumString(E e);
    char * typeEnumString(E e);
}