automatic symbol conversions

Author: ChrisRackauckas

src/operations.jl

@@ -62,6 +62,8 @@ Base.convert(::Type{Operation}, x::Number) = Operation(identity, Expression[Cons
 Base.convert(::Type{Operation}, x::Operation) = x
 Base.convert(::Type{Operation}, x::Expression) = Operation(identity, Expression[x])
 Operation(x) = convert(Operation, x)
+Base.Symbol(O::Operation) = Symbol(convert(Variable,O))
+Base.convert(::Type{Symbol},O::Operation) = Symbol(convert(Variable,O))
 
 #convert to Expr
 Base.Expr(op::Operation) = simplified_expr(op)