Merge pull request #371 from AayushSabharwal/as/broadcast-index

fix: fix indexing using array symbolics, `Colon`

Author: ChrisRackauckas

Project.toml

@@ -59,7 +59,7 @@ StaticArrays = "1.6"
 StaticArraysCore = "1.4"
 Statistics = "1.10"
 StructArrays = "0.6.11"
-SymbolicIndexingInterface = "0.3.19"
+SymbolicIndexingInterface = "0.3.20"
 Tables = "1.11"
 Test = "1"
 Tracker = "0.2.15"

src/vector_of_array.jl

@@ -351,49 +351,73 @@ Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::NotSymboli
     DiffEqArray(A.u[I], A.t[I], parameter_values(A), symbolic_container(A))
 end
 
+struct ParameterIndexingError <: Exception
+    sym
+end
+
+function Base.showerror(io::IO, pie::ParameterIndexingError)
+    print(io, "Indexing with parameters is deprecated. Use `getp(A, $(pie.sym))` for parameter indexing.")
+end
+
 # Symbolic Indexing Methods
-for symtype in [ScalarSymbolic, ArraySymbolic]
-    paramcheck = quote
-        if is_parameter(A, sym) || (sym isa AbstractArray && symbolic_type(eltype(sym)) !== NotSymbolic() || sym isa Tuple) && all(x -> is_parameter(A, x), sym)
-            error("Indexing with parameters is deprecated. Use `getp(A, $sym)` for parameter indexing.")
-        end
-    end
-    @eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype, sym)
-        $paramcheck
-        getu(A, sym)(A)
+for (symtype, elsymtype, valtype, errcheck) in [
+    (ScalarSymbolic, SymbolicIndexingInterface.SymbolicTypeTrait, Any, :(is_parameter(A, sym))),
+    (ArraySymbolic, SymbolicIndexingInterface.SymbolicTypeTrait, Any, :(is_parameter(A, sym))),
+    (NotSymbolic, SymbolicIndexingInterface.SymbolicTypeTrait, Union{<:Tuple, <:AbstractArray}, 
+        :(all(x -> is_parameter(A, x), sym))),
+]
+@eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype,
+        ::$elsymtype, sym::$valtype)
+    if $errcheck
+        throw(ParameterIndexingError(sym))
     end
-    @eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype, sym, arg)
-        $paramcheck
-        getu(A, sym)(A, arg)
+    getu(A, sym)(A)
+end
+@eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype,
+        ::$elsymtype, sym::$valtype, arg)
+    if $errcheck
+        throw(ParameterIndexingError(sym))
     end
-    @eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype, sym, arg::Union{AbstractArray{Int}, AbstractArray{Bool}})
-        $paramcheck
-        getu(A, sym).((A,), arg)
+    getu(A, sym)(A, arg)
+end
+@eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype,
+        ::$elsymtype, sym::$valtype, arg::Union{AbstractArray{Int}, AbstractArray{Bool}})
+    if $errcheck
+        throw(ParameterIndexingError(sym))
     end
-    @eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype, sym, arg::Colon)
-        $paramcheck
-        getu(A, sym)(A)
+    getu(A, sym).((A,), arg)
+end
+@eval Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::$symtype,
+        ::$elsymtype, sym::$valtype, ::Colon)
+    if $errcheck
+        throw(ParameterIndexingError(sym))
     end
+    getu(A, sym)(A)
+end
 end
 
 Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::ScalarSymbolic,
-        ::SymbolicIndexingInterface.SolvedVariables, args...)
+        ::NotSymbolic, ::SymbolicIndexingInterface.SolvedVariables, args...)
     return getindex(A, variable_symbols(A), args...)
 end
 
 Base.@propagate_inbounds function _getindex(A::AbstractDiffEqArray, ::ScalarSymbolic,
-        ::SymbolicIndexingInterface.AllVariables, args...)
+        ::NotSymbolic, ::SymbolicIndexingInterface.AllVariables, args...)
     return getindex(A, all_variable_symbols(A), args...)
 end
 
 Base.@propagate_inbounds function Base.getindex(A::AbstractVectorOfArray, _arg, args...)
     symtype = symbolic_type(_arg)
     elsymtype = symbolic_type(eltype(_arg))
 
-    if symtype != NotSymbolic()
-        return _getindex(A, symtype, _arg, args...)
+    if symtype == NotSymbolic() && elsymtype == NotSymbolic()
+        if _arg isa Union{Tuple, AbstractArray} && any(x -> symbolic_type(x) != NotSymbolic(), _arg)
+        _getindex(A, symtype, elsymtype, _arg, args...)
+        else
+            _getindex(A, symtype, _arg, args...)
+        end
     else
-        return _getindex(A, elsymtype, _arg, args...)
+        _getindex(A, symtype, elsymtype, _arg, args...)
     end
 end
 

test/downstream/symbol_indexing.jl

@@ -61,3 +61,15 @@ sol_ts = sol(ts)
 @assert sol_ts isa DiffEqArray
 test_tables_interface(sol_ts, [:timestamp, Symbol("x(t)"), Symbol("y(t)")],
     hcat(ts, Array(sol_ts)'))
+
+# Array variables
+using LinearAlgebra
+sts = @variables x(t)[1:3]=[1, 2, 3.0] y(t)=1.0
+ps = @parameters p[1:3] = [1, 2, 3]
+eqs = [collect(D.(x) .~ x)
+       D(y) ~ norm(collect(x)) * y - x[1]]
+@mtkbuild sys = ODESystem(eqs, t, sts, ps)
+prob = ODEProblem(sys, [], (0, 1.0))
+sol = solve(prob, Tsit5())
+@test sol[x .+ [y, 2y, 3y]] ≈ vcat.(getindex.((sol,), [x[1] + y, x[2] + 2y, x[3] + 3y])...)
+@test sol[x, :] ≈ sol[x]