fn get_next_actions()

in mdb_shard/src/set_operations.rs [34:63]

• 30 lines of code
• 4 McCabe index (conditional complexity)

fn get_next_actions(h1: Option<&MerkleHash>, h2: Option<&MerkleHash>, op: MDBSetOperation) -> Option<[NextAction; 2]> {
    match (h1, h2) {
        (None, None) => None,
        (Some(_), None) => {
            if op == MDBSetOperation::Union {
                Some([NextAction::CopyToOut, NextAction::Nothing])
            } else {
                Some([NextAction::SkipOver, NextAction::Nothing])
            }
        },
        (None, Some(_)) => Some([NextAction::Nothing, NextAction::CopyToOut]),
        (Some(ft0), Some(ft1)) => match ft0.cmp(ft1) {
            std::cmp::Ordering::Less => {
                if op == MDBSetOperation::Union {
                    Some([NextAction::CopyToOut, NextAction::Nothing])
                } else {
                    Some([NextAction::SkipOver, NextAction::Nothing])
                }
            },
            std::cmp::Ordering::Equal => {
                if op == MDBSetOperation::Union {
                    Some([NextAction::CopyToOut, NextAction::SkipOver])
                } else {
                    Some([NextAction::SkipOver, NextAction::SkipOver])
                }
            },
            std::cmp::Ordering::Greater => Some([NextAction::Nothing, NextAction::CopyToOut]),
        },
    }
}