Fix ODEFunction QuoteNode bug and implement iip_config (#1887)

Author: bradcarman

src/systems/diffeqs/abstractodesystem.jl

@@ -537,7 +537,7 @@ function ODEFunctionExpr{iip}(sys::AbstractODESystem, dvs = states(sys),
                           jac_prototype = $jp_expr,
                           syms = $(Symbol.(states(sys))),
                           indepsym = $(QuoteNode(Symbol(get_iv(sys)))),
-                          paramsyms = $(QuoteNode(Symbol.(parameters(sys)))),
+                          paramsyms = $(Symbol.(parameters(sys))),
                           sparsity = $(jacobian_sparsity(sys)))
     end
     !linenumbers ? striplines(ex) : ex

test/odesystem.jl

@@ -72,6 +72,15 @@ for f in [
     @test J == f.jac(u, p, t)
 end
 
+#check iip_config
+f = eval(ODEFunctionExpr(de, [x, y, z], [σ, ρ, β], iip_config = (false, true)))
+du = zeros(3)
+u = collect(1:3)
+p = collect(4:6)
+f.f(du, u, p, 0.1)
+@test du == [4, 0, -16]
+@test_throws ArgumentError f.f(u, p, 0.1)
+
 eqs = [D(x) ~ σ * (y - x),
     D(y) ~ x * (ρ - z) - y * t,
     D(z) ~ x * y - β * z]