Struct sval_json::Formatter

pub struct Formatter<W> { /* fields omitted */ }

A stream for writing structured data as json.

The stream internally wraps a std::fmt::Write.

Examples

Create an owned json stream:

use sval::stream::OwnedStream;
use sval_json::Formatter;

let mut stream = OwnedStream::begin(Formatter::new(String::new()))?;
stream.any(42)?;
let json = stream.end()?.into_inner();

assert_eq!("42", json);

Methods

impl<W> Formatter<W> where
    W: Write, 

pub fn new(out: W) -> Self

Create a new json stream.

pub fn into_inner(self) -> W

Get the inner writer back out of the stream.

There is no validation done to ensure the data written is valid.

Trait Implementations

impl<W> Stream for Formatter<W> where
    W: Write, 

fn begin(&mut self) -> Result<(), Error>

Begin the stream.

fn fmt(&mut self, v: Arguments) -> Result<(), Error>

Stream a format.

fn i64(&mut self, v: i64) -> Result<(), Error>

Stream a signed integer.

fn u64(&mut self, v: u64) -> Result<(), Error>

Stream an unsigned integer.

fn f64(&mut self, v: f64) -> Result<(), Error>

Stream a floating point value.

fn bool(&mut self, v: bool) -> Result<(), Error>

Stream a boolean.

fn char(&mut self, v: char) -> Result<(), Error>

Stream a unicode character.

fn str(&mut self, v: &str) -> Result<(), Error>

Stream a UTF-8 string slice.

fn none(&mut self) -> Result<(), Error>

Stream an empty value.

fn seq_begin(&mut self, _: Option<usize>) -> Result<(), Error>

Begin a sequence.

fn seq_elem(&mut self) -> Result<(), Error>

Begin a sequence element.

fn seq_end(&mut self) -> Result<(), Error>

End a sequence.

fn map_begin(&mut self, _: Option<usize>) -> Result<(), Error>

Begin a map.

fn map_key(&mut self) -> Result<(), Error>

Begin a map key.

fn map_value(&mut self) -> Result<(), Error>

Begin a map value.

fn map_end(&mut self) -> Result<(), Error>

End a map.

fn end(&mut self) -> Result<(), Error>

End the stream.

fn i128(&mut self, v: i128) -> Result<(), Error>

Stream a 128bit signed integer.

fn u128(&mut self, v: u128) -> Result<(), Error>

Stream a 128bit unsigned integer.