Trait Format 

pub trait Format: Send + Sync {
    // Required method
    fn write_record<W: Write + ?Sized>(
        &self,
        record: &Record<'_>,
        writer: &mut W,
    ) -> Result;
}

A record-to-bytes serializer.

Implementors should write exactly one logical “line” (or one logical document) per call. The included sinks add no extra separators between records; formatters that produce line-oriented output are expected to emit their own trailing newline.

Required Methods

fn write_record<W: Write + ?Sized>( &self, record: &Record<'_>, writer: &mut W, ) -> Result

Write the record to writer using a core::fmt::Write sink.

core::fmt::Write is used (instead of std::io::Write) so that formatters compile under no_std and can be used to format into a String or fixed-size buffer.

Errors

Returns core::fmt::Error if the underlying writer rejects a write.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T: Format + ?Sized> Format for &T

Helper adapter that lets &dyn Format be used as Format.

fn write_record<W: Write + ?Sized>( &self, record: &Record<'_>, writer: &mut W, ) -> Result

impl<T: Format + ?Sized> Format for Box<T>

Available on crate feature std only.

fn write_record<W: Write + ?Sized>( &self, record: &Record<'_>, writer: &mut W, ) -> Result

impl<T: Format + ?Sized> Format for Arc<T>

Available on crate feature std only.

fn write_record<W: Write + ?Sized>( &self, record: &Record<'_>, writer: &mut W, ) -> Result

Implementors

impl Format for HumanFormat

Available on crate feature human only.

impl Format for JsonFormat

Available on crate feature json only.

impl Format for LogfmtFormat

Available on crate feature logfmt only.