Re: Ranges: is it ok if front is a data member?

[bearophile]

Adam D. Ruppe:

Consider the following:
struct JustZeroes {
    int front = 0;
    enum bool = false;
    void popFront() {}
}

Is that guaranteed to work as an input range?

It seems similar to 0.repeat

When you are not sure add a static assert below the range, to 
verify it is the kind of range you want.

Bye,
bearophile