Identifiers cannot be used as local var once declared as symbols about symengine.jl

[kindlychung]

Julia version 0.6

[isuruf]

F(x) = begin
  x1 = x[1]
  x2 = x[2]
  res = SymF(x1 => x1, x2 => x2)
  convert(Float64, res)
end

Problem with the code is that in line4, the function call is equivalent to SymF(1=>1, 1=>2) since x1 has value 1, but the first argument of each pair has to be of type Basic, but 1 is a Int64.
How about adding a new method that takes in Symbols as well?
For eg: SymF(:x1 => x1, :x2 => x2)

[jverzani]

In SymPy we had that but removed it. It had issues when assumptions were put on symbolic variables. Here the issue is two uses of the same variable name.

[jverzani]

To elaborate, the hashing of a new variable derived from a symbol was not the same as one with assumptions. If that wouldn't be a symengine issue, the previous comment isn't apt.