Enum Keying 

pub enum Keying {
    Position,
    Relative,
    Indexed {
        prime: KeySpan,
        alternates: Vec<(KeySpan, bool)>,
    },
}

How the records of a file held in memory are keyed. Record numbers and positions are held as eight big-endian bytes, so that they sort.

Variants

Position

A sequential file opened I-O, by position.

Relative

A relative file, by record number. In the DD an empty slot is a record of no bytes, or of zero bytes only.

Indexed

An indexed file: the prime key, then each alternate key and whether it allows duplicates.

Fields

prime: KeySpan

alternates: Vec<(KeySpan, bool)>

Trait Implementations

impl Clone for Keying

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Keying

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Keying

impl PartialEq for Keying

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Keying