From 5a6f90b23e94dd5eb7004d8499486d62d71e8220 Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <Contact@ChrisRackauckas.com>
Date: Mon, 24 Feb 2020 08:09:47 -0500
Subject: [PATCH 1/2] Remove type mapping

it's not used by the constructors anymore
---
 src/utils.jl | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/utils.jl b/src/utils.jl
index c024e6d56e..0708f5fd66 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -90,8 +90,6 @@ function build_function(rhss, vs, ps = (), args = (), conv = simplified_expr, ex
                 return $arr_bounds_block
             else
                 X = $bounds_block
-                T = promote_type(map(typeof,X)...)
-                map(T,X)
                 construct = $_constructor
                 return construct(X)
             end

From 11dc663ccd04c7c95639ecb59634b55e7d50e0a5 Mon Sep 17 00:00:00 2001
From: Chris Rackauckas <accounts@chrisrackauckas.com>
Date: Mon, 24 Feb 2020 09:11:00 -0500
Subject: [PATCH 2/2] fix MTK tests due to one(x) change in StaticArrays

---
 src/function_registration.jl | 1 +
 src/simplify.jl              | 2 +-
 test/direct.jl               | 1 +
 test/runtests.jl             | 2 +-
 4 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/function_registration.jl b/src/function_registration.jl
index 092e4a9421..582cdcfe89 100644
--- a/src/function_registration.jl
+++ b/src/function_registration.jl
@@ -59,3 +59,4 @@ Base.:^(x::Expression,y::T) where T <: Rational = Operation(Base.:^, Expression[
 @register Base.conj(x)
 @register Base.getindex(x,i)
 Base.getindex(x::Operation,i::Int64) = Operation(getindex,[x,i])
+Base.one(::Operation) = 1
diff --git a/src/simplify.jl b/src/simplify.jl
index 17e098590d..8302b4a057 100644
--- a/src/simplify.jl
+++ b/src/simplify.jl
@@ -14,7 +14,7 @@ end
 simplify_constants(x, shorten_tree) = x
 simplify_constants(x) = simplify_constants(x, true)
 
-
+Base.isone(x::Operation) = x.op == one || x.op == Constant && isone(x.args)
 const AC_OPERATORS = (*, +)
 
 function _simplify_constants(O::Operation, shorten_tree)
diff --git a/test/direct.jl b/test/direct.jl
index 837380267a..f8bfd896b9 100644
--- a/test/direct.jl
+++ b/test/direct.jl
@@ -26,6 +26,7 @@ for i in 1:3
     ∇ = ModelingToolkit.gradient(eqs[i],[x,y,z])
     @test isequal(∂[i,:],∇)
 end
+                   
 @test all(isequal.(ModelingToolkit.gradient(eqs[1],[x,y,z]),[σ * -1,σ,0]))
 @test all(isequal.(ModelingToolkit.hessian(eqs[1],[x,y,z]),0))
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 941809e8bc..9fb7a9e367 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -9,4 +9,4 @@ using ModelingToolkit, Test
 @testset "Constraints Test" begin include("constraints.jl") end
 @testset "PDE Construction Test" begin include("pde.jl") end
 @testset "Distributed Test" begin include("distributed.jl") end
-#@testset "Latexify recipes Test" begin include("latexify.jl") end
+@testset "Latexify recipes Test" begin include("latexify.jl") end