import std;

​

void main()

{

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

    static assert(longestMemberName!Bar == "aaaaaaaaaa".length);

​

}

​

struct Foo

{

    string s;

    int ii;

    bool bbb;

    deprecated("Use `s`")

    string zzzz;

}

​

class Bar

{

    string s;

    int ii;

    bool aaaaaaaaaa;

    deprecated("Use `s`")

    string xxxxxxxxxxxxxx;

}

​

template isMemberDeprecated(T, string name)

{

    enum isMemberDeprecated = mixin(q{__traits(isDeprecated, }, T, ".", name, q{)});

}

​

private template longestMemberName(T)

{

    enum longestMemberName = ()

    {

        size_t maxLength;

​

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

        {

            pragma(msg, "is ", T.stringof, ".", member, "\t deprecated? : ", isMemberDeprecated!(T, member));

​

            static if (!isMemberDeprecated!(T, member))

            {

                maxLength = max(maxLength, member.length);

            }

        }

​

        return maxLength;

    }();

}