CODEWITHSUNDEEP
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Tyler Durden
Tyler Durden

Reputation: 11532

Is there a way to declare a function argument to take an anonymous enum?

If I have an anonymous enum, is there any way to pass a value of that type to a function? For example,

typedef struct {
    enum { On, Off } status;
    int max_amps;
} SWITCH;

void make_switches(){
    SWITCH switch1 = createSwitch( On, 15 );
    SWITCH switch2 = createSwitch( Off, 20 );
}

SWITCH* createSwitch( ??? status, int max_amps ){
    SWITCH* new_switch = malloc( sizeof( SWITCH ) );
    new_switch->status = status;
    new_switch->max_amps = max_amps;
    return new_switch;
}

I would like to pass the value of the anonymous enum into the createSwitch() function. Is there any way to do this?

Upvotes: 8

Views: 347

Answers (1)

P.W
P.W

Reputation: 26800

As others have suggested, you can simply use an int in the place of ???.

This is because as per 6.7.2.2/3 of C11 standard (Committee draft):

The identifiers in an enumerator list are declared as constants that have type int and may appear wherever such are permitted.

Upvotes: 10

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