simonbyrne

# To ensure correct alignment (e.g. for an 80-bit type)
struct StrWrap{T}
    value::T
end

function unsafe_reinterpret(T, a::A) where {A}
    if sizeof(T) <= sizeof(A)
        r = Ref(a)
        Base.@gc_preserve r begin
            u = convert(Ptr{T}, Base.unsafe_convert(Ptr{A}, r))