Question

I have switch. One of the cases must be a count of array:

    int count = [array count];
    switch (someValue) {
        case 0:
            [self foo];
            break;
        case count:
            [self bar];
            break;

        default:
            break;
    }

But compiler tolds:

Expression is not an integer constant expression

How to make const int from [array count]?

Answer 1

As the error suggests, the cases must all be constants. You’ll need an if statement to check the dynamic case:

    int count = [array count];
    switch (someValue) {
        case 0:
            [self foo];
            break;
        default:
            if (someValue == count)
                [self bar];
            break;
    }