[matthijscox]

This solves my issue: #30

The macro now takes the output type assertion into consideration, which is basically all I needed:

julia> @macroexpand f(x::X) = @unionsplit f(x)
:(f(x::X) = begin
          (WrappedUnions).unionsplit(f, (x,), (;))
      end)

julia> @macroexpand f(x::X) = @unionsplit f(x)::Real
:(f(x::X) = begin
          (WrappedUnions).unionsplit(f, (x,), (;))::Real
      end)

[ameligrana]

Hi @matthijscox, thanks for the contribution, seems totally reasonable, I like also the way this feature is introduced, so, I will merge (and release a new version) as soon as you can fix the 1.10 failure!

[ameligrana]

Actually fixed it myself!