add missing TaylorBundle constructor, thus fixing map

Author: oxinabox

src/tangent.jl

@@ -206,20 +206,25 @@ end
 
 const TaylorBundle{N, B, P} = TangentBundle{N, B, TaylorTangent{P}}
 
+
+function TaylorBundle{N, B, P}(primal::B, coeffs::P) where {N, B, P}
+    check_taylor_invariants(coeffs, primal, N)
+    _TangentBundle(Val{N}(), primal, TaylorTangent(coeffs))
+end
 function TaylorBundle{N, B}(primal::B, coeffs) where {N, B}
     check_taylor_invariants(coeffs, primal, N)
     _TangentBundle(Val{N}(), primal, TaylorTangent(coeffs))
 end
+function TaylorBundle{N}(primal, coeffs) where {N}
+    check_taylor_invariants(coeffs, primal, N)
+    _TangentBundle(Val{N}(), primal, TaylorTangent(coeffs))
+end
 
 function check_taylor_invariants(coeffs, primal, N)
     @assert length(coeffs) == N
-
 end
 @ChainRulesCore.non_differentiable check_taylor_invariants(coeffs, primal, N)
 
-function TaylorBundle{N}(primal, coeffs) where {N}
-    _TangentBundle(Val{N}(), primal, TaylorTangent(coeffs))
-end
 
 function Base.show(io::IO, x::TaylorBundle{1})
     print(io, x.primal)

test/forward.jl

@@ -1,6 +1,6 @@
-module forward_tests
+#module forward_tests
 using Diffractor
-using Diffractor: TaylorBundle, ZeroBundle
+using Diffractor: TaylorBundle, ZeroBundle, ∂☆
 using ChainRules
 using ChainRulesCore
 using ChainRulesCore: ZeroTangent, NoTangent, frule_via_ad, rrule_via_ad
@@ -61,7 +61,7 @@ end
     end
 
     # Special case if there is no derivative information at all:
-    @test (Diffractor.∂☆{1}())(ZeroBundle{1}(foo), ZeroBundle{1}(2.0), ZeroBundle{1}(3.0)) == ZeroBundle{1}(5.0)
+    @test ∂☆{1}()(ZeroBundle{1}(foo), ZeroBundle{1}(2.0), ZeroBundle{1}(3.0)) == ZeroBundle{1}(5.0)
     @test frule_calls[] == 0
     @test primal_calls[] == 1
 end
@@ -88,6 +88,14 @@ end
 end
 
 
+@testset "map" begin
+    @test ==(
+        ∂☆{1}()(ZeroBundle{1}(xs->(map(x->2*x, xs))), TaylorBundle{1}([1.0, 2.0], ([10.0, 100.0],))),
+        TaylorBundle{1}([2.0, 4.0], ([20.0, 200.0],))
+    )
+end
+
+
 @testset "structs" begin
     struct IDemo
         x::Float64