Inspecting __traits(isDeprecated) and deprecation warnings

[Anonymouse via Digitalmars-d-learn]

I want to write a piece of code that reflects on the names of 
members of a passed struct, where some are depreacted.

https://run.dlang.io/is/P9EtRG
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);

onlineapp.d(23): Deprecation: variable `onlineapp.Foo.zzzz` is 
deprecated - Use s

Is there any way to inspect the deprecated-ness of a member this 
way? I only have what __traits(allMembers) gives me.