fn resolve_ddd<'a, S: Clone>(
        lhs: &'a Rc<Vec<EnvMBE<T>>>,
        lhs_ddd: &'a Option<usize>,
        rhs: &'a Rc<Vec<EnvMBE<S>>>,
        rhs_ddd: &'a Option<usize>,
    ) -> Vec<(&'a EnvMBE<T>, &'a EnvMBE<S>)>
    {
        let len_diff = lhs.len() as i32 - (rhs.len() as i32);

        let matched: Vec<(&EnvMBE<T>, &EnvMBE<S>)> = match (lhs_ddd, rhs_ddd) {
            (&None, &None) => {
                if len_diff != 0 {
                    panic!("mismatched MBE lengths")
                }
                lhs.iter().zip(rhs.iter()).collect()
            }
            (&Some(ddd_idx), &None) => {
                if len_diff - 1 > 0 {
                    panic!("abstract MBE LHS too long")
                }
                DddIter::new(lhs.iter(), ddd_idx, -(len_diff - 1) as usize)
                    .zip(rhs.iter())
                    .collect()
            }
            (&None, &Some(ddd_idx)) => {
                if len_diff + 1 < 0 {
                    panic!("abstract MBE RHS too long")
                }
                lhs.iter().zip(DddIter::new(rhs.iter(), ddd_idx, (len_diff + 1) as usize)).collect()
            }
            (&Some(_), &Some(_)) => panic!("repetition on both sides"),
        };

        matched
    }
/// Duplicate contents of the side with a DDD to line it up with the other
// TODO: this needs to return `Option` (and so does everything `_with`)
// TODO: for efficiency, this ought to return iterators
Duplicate contents of the side with a DDD to line it up with the other
TODO: this needs to return `Option` (and so does everything `_with`)
TODO: for efficiency, this ought to return iterators
Duplicate contents of the side with a DDD to line it up with the other TODO : this needs to return ` Option ` ( and so does everything ` _with ` ) TODO : for efficiency this ought to return iterators
fn resolve_ddd<'a, S: Clone>(
        lhs: &'a Rc<Vec<EnvMBE<T>>>,
        lhs_ddd: &'a Option<usize>,
        rhs: &'a Rc<Vec<EnvMBE<S>>>,
        rhs_ddd: &'a Option<usize>,
    ) -> Vec<(&'a EnvMBE<T>, &'a EnvMBE<S>)>
    {
        let len_diff = lhs.len() as i32 - (rhs.len() as i32);
        let matched: Vec<(&EnvMBE<T>, &EnvMBE<S>)> = match (lhs_ddd, rhs_ddd) {
            (&None, &None) => {
                if len_diff != 0 {
                    panic!("mismatched MBE lengths")
                }
                lhs.iter().zip(rhs.iter()).collect()
            }
            (&Some(ddd_idx), &None) => {
                if len_diff - 1 > 0 {
                    panic!("abstract MBE LHS too long")
                }
                DddIter::new(lhs.iter(), ddd_idx, -(len_diff - 1) as usize)
                    .zip(rhs.iter())
                    .collect()
            }
            (&None, &Some(ddd_idx)) => {
                if len_diff + 1 < 0 {
                    panic!("abstract MBE RHS too long")
                }
                lhs.iter().zip(DddIter::new(rhs.iter(), ddd_idx, (len_diff + 1) as usize)).collect()
            }
            (&Some(_), &Some(_)) => panic!("repetition on both sides"),
        };
        matched
    }
fn resolve_ddd < ' a , S : Clone > ( lhs : & ' a Rc < Vec < EnvMBE < T > > > , lhs_ddd : & ' a Option < usize > , rhs : & ' a Rc < Vec < EnvMBE < S > > > , rhs_ddd : & ' a Option < usize > , ) -> Vec < ( & ' a EnvMBE < T > , & ' a EnvMBE < S > ) > { let len_diff = lhs . len ( ) as i32 - ( rhs . len ( ) as i32 ) ; let matched : Vec < ( & EnvMBE < T > , & EnvMBE < S > ) > = match ( lhs_ddd , rhs_ddd ) { ( & None , & None ) => { if len_diff != 0 { panic ! ( " " ) } lhs . iter ( ) . zip ( rhs . iter ( ) ) . collect ( ) } ( & Some ( ddd_idx ) , & None ) => { if len_diff - 1 > 0 { panic ! ( " " ) } DddIter :: new ( lhs . iter ( ) , ddd_idx , - ( len_diff - 1 ) as usize ) . zip ( rhs . iter ( ) ) . collect ( ) } ( & None , & Some ( ddd_idx ) ) => { if len_diff + 1 < 0 { panic ! ( " " ) } lhs . iter ( ) . zip ( DddIter :: new ( rhs . iter ( ) , ddd_idx , ( len_diff + 1 ) as usize ) ) . collect ( ) } ( & Some ( _ ) , & Some ( _ ) ) => panic ! ( " " ) , } ; matched }
Duplicate contents of the side with a DDD to line it up with the other
TODO: this needs to return `Option` (and so does everything `_with`)
TODO: for efficiency, this ought to return iterators
Duplicate contents of the side with a DDD to line it up with the other TODO : this needs to return ` Option ` ( and so does everything ` _with ` ) TODO : for efficiency this ought to return iterators
lhs
&'a Rc<Vec<EnvMBE<T>>>
lhs_ddd
&'a Option<usize>
rhs
&'a Rc<Vec<EnvMBE<S>>>
rhs_ddd
&'a Option<usize>
lhs
&'a Rc<Vec<EnvMBE<T>>>
lhs_ddd
&'a Option<usize>
rhs
&'a Rc<Vec<EnvMBE<S>>>
rhs_ddd
&'a Option<usize>