Merge pull request #1062 from JuliaSymbolics/myb/getprop

Add symbolic_getproperty

src/struct.jl

@@ -67,7 +67,7 @@ function decodetyp(typ::TypeT)
     end
 end
 
-struct Struct
+struct Struct <: Real
     juliatype::DataType
     v::Vector{StructElement}
 end
@@ -108,6 +108,13 @@ function Base.setproperty!(s::Struct, name::Symbol, x)
     SymbolicUtils.term(setfield!, s, idx, x; type)
 end
 
+function symbolic_getproperty(s, name::Symbol)
+    SymbolicUtils.term(getfield, s, name, type = Real)
+end
+function symbolic_getproperty(s::Union{Arr, Num}, name::Symbol)
+    wrap(symbolic_getproperty(unwrap(s), name))
+end
+
 # We cannot precisely derive the type after `getfield` due to SU limitations,
 # so give up and just say Real.
 SymbolicUtils.promote_symtype(::typeof(getfield), ::Type{<:Struct}, _...) = Real