pluto functor bug

functor_bug.jl

### A Pluto.jl notebook ###
# v0.19.32

using Markdown
using InteractiveUtils

# ╔═╡ a353c1f3-0921-4c9b-ab1d-a34cb262b3d9
# following docs at https://docs.julialang.org/en/v1/manual/methods/#Function-like-objects-1
# lets make a functor

# ╔═╡ 9de6d141-a55f-4c65-a326-27485dedb0c2
p(5)

# ╔═╡ 75220770-92be-11ee-2bf9-61e84388414e
struct Polynomial{R}
   coeffs::Vector{R}
end

# ╔═╡ 2c3218fa-bd79-4c14-864b-3c3b2b4bc7ea
function (p::Polynomial)(x)
   v = p.coeffs[end]
   for i = (length(p.coeffs)-1):-1:1
	   v = v*x + p.coeffs[i]
   end
   return v
end

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