don't restructure on number

Author: ChrisRackauckas

src/broyden.jl

@@ -58,12 +58,12 @@ function SciMLBase.__solve(prob::NonlinearProblem, alg::Broyden, args...;
     xₙ₋₁ = x
     fₙ₋₁ = fₙ
     for _ in 1:maxiters
-        xₙ = xₙ₋₁ - ArrayInterface.restructure(xₙ₋₁, J⁻¹ * _vec(fₙ₋₁))
+        xₙ = xₙ₋₁ - _restructure(xₙ₋₁, J⁻¹ * _vec(fₙ₋₁))
         fₙ = f(xₙ)
         Δxₙ = xₙ - xₙ₋₁
         Δfₙ = fₙ - fₙ₋₁
-        J⁻¹Δfₙ = ArrayInterface.restructure(Δfₙ, J⁻¹ * _vec(Δfₙ))
-        J⁻¹ += ArrayInterface.restructure(J⁻¹, ((_vec(Δxₙ) .- _vec(J⁻¹Δfₙ)) ./ (_vec(Δxₙ)' * _vec(J⁻¹Δfₙ))) * (_vec(Δxₙ)' * J⁻¹))
+        J⁻¹Δfₙ = _restructure(Δfₙ, J⁻¹ * _vec(Δfₙ))
+        J⁻¹ += _restructure(J⁻¹, ((_vec(Δxₙ) .- _vec(J⁻¹Δfₙ)) ./ (_vec(Δxₙ)' * _vec(J⁻¹Δfₙ))) * (_vec(Δxₙ)' * J⁻¹))
 
         if termination_condition(fₙ, xₙ, xₙ₋₁, atol, rtol)
             return SciMLBase.build_solution(prob, alg, xₙ, fₙ; retcode = ReturnCode.Success)

src/klement.jl

@@ -75,7 +75,7 @@ function SciMLBase.__solve(prob::NonlinearProblem,
                 F = lu(J, check = false)
             end
 
-            tmp = ArrayInterface.restructure(fₙ₋₁, F \ _vec(fₙ₋₁))
+            tmp = _restructure(fₙ₋₁, F \ _vec(fₙ₋₁))
             xₙ = xₙ₋₁ - tmp
             fₙ = f(xₙ)
 
@@ -92,9 +92,9 @@ function SciMLBase.__solve(prob::NonlinearProblem,
             Δfₙ = fₙ - fₙ₋₁
 
             # Prevent division by 0
-            denominator = ArrayInterface.restructure(Δxₙ, max.(J' .^ 2 * _vec(Δxₙ) .^ 2, 1e-9))
+            denominator = _restructure(Δxₙ, max.(J' .^ 2 * _vec(Δxₙ) .^ 2, 1e-9))
 
-            k = (Δfₙ - ArrayInterface.restructure(Δxₙ, J * _vec(Δxₙ))) ./ denominator
+            k = (Δfₙ - _restructure(Δxₙ, J * _vec(Δxₙ))) ./ denominator
             J += (_vec(k) * _vec(Δxₙ)' .* J) * J
 
             xₙ₋₁ = xₙ

src/raphson.jl

@@ -100,7 +100,7 @@ function SciMLBase.__solve(prob::NonlinearProblem,
         end
         iszero(fx) &&
             return SciMLBase.build_solution(prob, alg, x, fx; retcode = ReturnCode.Success)
-        Δx = ArrayInterface.restructure(fx, dfx \ _vec(fx))
+        Δx = _restructure(fx, dfx \ _vec(fx))
         x -= Δx
         if isapprox(x, xo, atol = atol, rtol = rtol)
             return SciMLBase.build_solution(prob, alg, x, fx; retcode = ReturnCode.Success)

src/utils.jl

@@ -85,4 +85,7 @@ end
 
 @inline _vec(v) = vec(v)
 @inline _vec(v::Number) = v
-@inline _vec(v::AbstractVector) = v
+@inline _vec(v::AbstractVector) = v
+
+@inline _restructure(y::Number, x::Number) = x
+@inline _restructure(y, x) = ArrayInterface.restructure(y,x)