Struct Header 

pub struct Header {
    pub tag: Tag,
    pub version: u16,
    pub len: u32,
}

The eight bytes in front of every record payload.

Fields

tag: Tag

Which record this is.

version: u16

Which version of that record’s layout the payload uses.

A version only goes up when a field is removed or changes meaning. Adding a field at the end does not need a new version, because a reader that does not know about the field skips it.

len: u32

How many bytes of payload follow, not counting the padding after them.

Implementations

impl Header

pub const SIZE: usize = 8

How wide a header is, in bytes.

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Header

impl Debug for Header

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

Formats the value using the given formatter.

impl Eq for Header

impl PartialEq for Header

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Header