I have a problem similar to this:
But in an opposite way, that I already have a string and want to parse it back to be a tree.
For example, I have
type expr =
Number of int
|Plus of expr*expr
|Minus of expr*expr
and I have a string like 1 2 + 3 4 + - (operator notations post-fixed, a little different from the link above)
Then I want my result to be a expr type
Minus(Plus(1,2), Plus(3, 4))
I found another link that might talk about this, but not sure if it's a way of doing my problem:
Please share some ideas, thank you.