Trait datafrog::Leaper

pub trait Leaper<'leap, Tuple, Val> {
    fn count(&mut self, prefix: &Tuple) -> usize;
    fn propose(&mut self, prefix: &Tuple, values: &mut Vec<&'leap Val>);
    fn intersect(&mut self, prefix: &Tuple, values: &mut Vec<&'leap Val>);
}

Methods to support treefrog leapjoin.

Required Methods

fn count(&mut self, prefix: &Tuple) -> usize

Estimates the number of proposed values.

fn propose(&mut self, prefix: &Tuple, values: &mut Vec<&'leap Val>)

Populates values with proposed values.

fn intersect(&mut self, prefix: &Tuple, values: &mut Vec<&'leap Val>)

Restricts values to proposed values.

Implementors

impl<'leap, Key, Val, Tuple, Func> Leaper<'leap, Tuple, Val> for ExtendWith<'leap, Key, Val, Tuple, Func>where
    Key: Ord + 'leap,
    Val: Ord + 'leap,
    Tuple: Ord,
    Func: Fn(&Tuple) -> Key,

impl<'leap, Key, Val, Val2, Tuple, Func> Leaper<'leap, Tuple, Val2> for FilterWith<'leap, Key, Val, Tuple, Func>where
    Key: Ord + 'leap,
    Val: Ord + 'leap,
    Tuple: Ord,
    Func: Fn(&Tuple) -> (Key, Val),

impl<'leap, Key: Ord, Val: Ord + 'leap, Tuple: Ord, Func> Leaper<'leap, Tuple, Val> for ExtendAnti<'leap, Key, Val, Tuple, Func>where
    Key: Ord + 'leap,
    Val: Ord + 'leap,
    Tuple: Ord,
    Func: Fn(&Tuple) -> Key,

impl<'leap, Key: Ord, Val: Ord + 'leap, Val2, Tuple: Ord, Func> Leaper<'leap, Tuple, Val2> for FilterAnti<'leap, Key, Val, Tuple, Func>where
    Key: Ord + 'leap,
    Val: Ord + 'leap,
    Tuple: Ord,
    Func: Fn(&Tuple) -> (Key, Val),

impl<'leap, Tuple, Val, Func> Leaper<'leap, Tuple, Val> for PrefixFilter<Tuple, Func>where
    Func: Fn(&Tuple) -> bool,

impl<'leap, Tuple, Val, Func> Leaper<'leap, Tuple, Val> for ValueFilter<Tuple, Val, Func>where
    Func: Fn(&Tuple, &Val) -> bool,