Struct CountSink 

pub struct CountSink { /* private fields */ }

A sink that counts bytes and writes nothing.

Run a writer into it to learn the exact output length, then size a buffer once. Saturates at usize::MAX.

Examples

use parse_net::{self as pn, write};

let mut count = pn::CountSink::new();
write::write_param(b"filename", b"my report.pdf", &mut count)?;
let mut buf = [0u8; 64];
let mut out = pn::SliceSink::new(&mut buf[..count.count()]);
write::write_param(b"filename", b"my report.pdf", &mut out)?;
assert_eq!(out.written(), b"; filename=\"my report.pdf\"");

Implementations

impl CountSink

pub const fn new() -> Self

A counter at zero.

pub const fn count(&self) -> usize

The number of bytes put so far.

Trait Implementations

impl Clone for CountSink

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CountSink

impl Debug for CountSink

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

Formats the value using the given formatter.

impl Default for CountSink

fn default() -> Self

Returns the “default value” for a type.

impl Eq for CountSink

impl Hash for CountSink

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for CountSink

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

Equality operator ==.

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

Inequality operator !=.

impl Sink for CountSink

fn put(&mut self, bytes: &[u8]) -> Result<(), Full>

Appends all of bytes, or fails with Full and appends nothing.

fn remaining(&self) -> Option<usize>

How many more bytes fit, when the sink knows; None otherwise.

impl StructuralPartialEq for CountSink