Struct Sort 

pub struct Sort<'a> {
    pub field: usize,
    pub desc: bool,
    pub key: &'a dyn Fn(&[u8]) -> Option<Vec<u8>>,
}

An order to select the top hits by, other than the score.

The key function maps a stored value’s raw bytes to an order-preserving encoding, computed once per candidate; the segment then compares bytes and never learns what a number is. None from it means the document has no usable value for the field, which sorts last in both directions — missing is not a value, and placing it at one end or the other by direction would make “the oldest” and “the newest” disagree about where the unknowns went.

Fields

field: usize

Which declared value field orders the result.

desc: bool

Descending when true.

key: &'a dyn Fn(&[u8]) -> Option<Vec<u8>>

The order-preserving encoding of one stored value.

Trait Implementations

impl<'a> Clone for Sort<'a>

fn clone(&self) -> Sort<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Copy for Sort<'a>