SymEngine.Basic in struct

[zhaoli-IHEP]

After some calculation, the expression just become equal to a symbol.
But the struct constructor seems copied something different.
What is this happening here? And what is the proper approach to do this?
Thank you.

using SymEngine

@vars x

struct test
  val::Basic
end

expr = x+2
expr_m2 = expr-2

println( SymEngine.get_symengine_class(x) ) # Symbol
println( SymEngine.get_symengine_class(expr_m2) ) # also Symbol

println( x == expr_m2 ) # true
println( test(x)==test(x) ) # also true
println( test(x)==test(expr_m2) ) # unexpected false

[isuruf]

@zhaoli-IHEP, we create julia objects from symengine C objects as necessary. Therefore expr and (expr+2)-2 are two different objects, but == operator is overloaded to compare. You'll have to overload == operator for test too

[zhaoli-IHEP]

@zhaoli-IHEP, we create julia objects from symengine C objects as necessary. Therefore expr and (expr+2)-2 are two different objects, but == operator is overloaded to compare. You'll have to overload == operator for test too

Thank you so much. Now I can understand this issue.