What's the use of FASTFortranTFortranBinaryExpression ?

[NicolasAnquetil]

since operator/left//right are defined in FASTFortranBinaryExpression, why having a trait ?

[lsafina]

If I understood correctly, we can not instantiate a trait so we still need the class FortranBinaryExpression inheriting TBinaryExpression. So we could only a) delete left/right from FortranBinaryExpression, b) delete left/right from TBinaryExpression, c) keep both.

@NicolasAnquetil what do you prefer?

[NicolasAnquetil]

That is correct: cannot instantiate a Trait

I prefer (a): put left/right in TBinaryExpression and have FortranBinaryExpression "inherit" them from the trait
There is also a need for an operator in TBinaryExpression.
It can be just a String for now.

[lsafina]

move left/right, operator from unary/binary expressions to the traits level
merged