parametric constructor warning

[t-bltg]

The following leaves a warning, although the result is correct:

julia> @oodef struct Foo{F}
  x::F
  function new()
    @mk x = F(1)
  end
end
WARNING: method definition for Foo at REPL[4]:3 declares type variable F but does not use it.

julia> f = Foo{Float64}()
julia> f.x
1.0

[thautwarm]

This is generally not achievable due to the lack of scope analysis tool for Julia metaprogramming. Anyway, I created a partial fix for this at https://github.com/Suzhou-Tongyuan/ObjectOriented.jl/pull/14 .

Please comment if any idea.