import std;

​

void main() {}

​

struct Foo

{

    string s;

    int ii;

    bool bbb;

​

    deprecated("Use `s`")

    string zzzz;

}

​

template longestMemberLength(T)

{

    enum longestMemberLength = ()

    {

        size_t maxLength;

​

        foreach (immutable i, immutable name; __traits(allMembers, T))

        {

            static if (!__traits(isDeprecated, __traits(getMember, T, name)))

            {

                maxLength = max(maxLength, name.length);

            }

        }

        return maxLength;

    }();

}

​

static assert (longestMemberLength!Foo == "bbb".length);