Merge pull request #923 from SciML/returns_forwarddif

Specialize forwarddiff dual detection for Returns

Author: ChrisRackauckas

src/forwarddiff.jl

@@ -114,6 +114,10 @@ anyeltypedual(x::Union{ForwardDiff.AbstractConfig, Module}, counter = 0) = Any
 anyeltypedual(x::Type{T}, counter = 0) where {T <: ForwardDiff.AbstractConfig} = Any
 anyeltypedual(x::SciMLBase.RecipesBase.AbstractPlot, counter = 0) = Any
 
+if VERSION >= v"1.7"
+    anyeltypedual(x::Returns, counter = 0) = anyeltypedual(x.value, counter)
+end
+
 if isdefined(PreallocationTools, :FixedSizeDiffCache)
     anyeltypedual(x::PreallocationTools.FixedSizeDiffCache, counter = 0) = Any
 end

test/forwarddiff_dual_detection.jl

@@ -85,8 +85,7 @@ p_possibilities17 = [
     (Mod, ForwardDiff.Dual(2.0)), (() -> 2.0, ForwardDiff.Dual(2.0)),
     (Base.pointer([2.0]), ForwardDiff.Dual(2.0)),
 ]
-VERSION >= v"1.7" && VERSION < v"1.9" &&
-    push!(p_possibilities17, Returns((a = 2, b = 1.3, c = ForwardDiff.Dual(2.0f0))))
+VERSION >= v"1.7" && push!(p_possibilities17, Returns((a = 2, b = 1.3, c = ForwardDiff.Dual(2.0f0))))
 
 for p in p_possibilities17
     @show p
@@ -128,9 +127,6 @@ p_possibilities_uninferrred = [
     (; x = Vector{Float64}(undef, 2), y = [[MyStruct3(ForwardDiff.Dual(2.0))]]),
     (; x = Matrix{Any}(undef, 2, 2), y = [[MyStruct3(ForwardDiff.Dual(2.0))]]),
 ]
-VERSION >= v"1.9" &&
-    push!(p_possibilities_uninferrred,
-        Returns((a = 2, b = 1.3, c = ForwardDiff.Dual(2.0f0))))
 
 for p in p_possibilities_uninferrred
     @show p