fix rename

Author: ChrisRackauckas

src/build_function.jl

@@ -120,14 +120,14 @@ function numbered_expr(O::Operation,vars,parameters;
                         varname=varname,paramname=paramname) for x in O.args]...)
 end
 
-function numbered_expr(de::ModelingToolkit.DiffEq,vars::Vector{Variable},parameters;
+function numbered_expr(de::ModelingToolkit.ODEExpr,vars::Vector{Variable},parameters;
                        derivname=:du,varname=:u,paramname=:p)
     i = findfirst(x->isequal(x.name,de.x.name),vars)
     :($derivname[$i] = $(numbered_expr(de.rhs,vars,parameters;
                                      derivname=derivname,
                                      varname=varname,paramname=paramname)))
 end
-function numbered_expr(de::ModelingToolkit.DiffEq,vars::Vector{Operation},parameters;
+function numbered_expr(de::ModelingToolkit.ODEExpr,vars::Vector{Operation},parameters;
                        derivname=:du,varname=:u,paramname=:p)
     i = findfirst(x->isequal(x.op.name,de.x.name),vars)
     :($derivname[$i] = $(numbered_expr(de.rhs,vars,parameters;

src/systems/diffeqs/first_order_transform.jl

@@ -14,7 +14,7 @@ end
 function ode_order_lowering(eqs, iv)
     var_order = Dict{Variable,Int}()
     vars = Variable[]
-    new_eqs = similar(eqs, DiffEq)
+    new_eqs = similar(eqs, ODEExpr)
     new_vars = Variable[]
 
     for (i, eq) ∈ enumerate(eqs)
@@ -25,7 +25,7 @@ function ode_order_lowering(eqs, iv)
         end
         var′ = lower_varname(eq.x, iv, eq.n - 1)
         rhs′ = rename(eq.rhs)
-        new_eqs[i] = DiffEq(var′, 1, rhs′)
+        new_eqs[i] = ODEExpr(var′, 1, rhs′)
     end
 
     for var ∈ vars
@@ -36,7 +36,7 @@ function ode_order_lowering(eqs, iv)
             push!(new_vars, rvar)
 
             rhs = rvar(iv())
-            eq = DiffEq(lvar, 1, rhs)
+            eq = ODEExpr(lvar, 1, rhs)
             push!(new_eqs, eq)
         end
     end

src/systems/diffeqs/odesystem.jl

@@ -10,7 +10,7 @@ function flatten_differential(O::Operation)
     return (x, t, order + 1)
 end
 
-struct DiffEq  # dⁿx/dtⁿ = rhs
+struct ODEExpr  # dⁿx/dtⁿ = rhs
     x::Variable
     n::Int
     rhs::Expression
@@ -98,7 +98,7 @@ function ODESystem(eqs)
     ODESystem(deqs, iv, dvs, ps)
 end
 
-function ODESystem(deqs::AbstractVector{DiffEq}, iv, dvs, ps)
+function ODESystem(deqs::AbstractVector{ODEExpr}, iv, dvs, ps)
     tgrad = RefValue(Vector{Expression}(undef, 0))
     jac = RefValue(Matrix{Expression}(undef, 0, 0))
     Wfact   = RefValue(Matrix{Expression}(undef, 0, 0))