Fallback operator

[jpearll]

Hi, would it be possible to have a fallback operator instead of using a complementary operator (i.e. > and <=)?

[sgrodriguez]

Fallback is an interesting feature.
I don't think the operator has to take the responsibility of fallbacking, an alternative could be a fallback node. After comparing all the node's childs, if no one satisfies the condition, continue with the fallback node or return an error.