Trait Write16 

pub trait Write16 {
    // Required method
    fn write_slice(&mut self, s: &[u16]) -> Result;

    // Provided methods
    fn write_char(&mut self, c: char) -> Result { ... }
    fn size_hint(&mut self, upcoming: usize) -> Result { ... }
}

A UTF-16 sink analogous to core::fmt::Write.

Required Methods

fn write_slice(&mut self, s: &[u16]) -> Result

Write a slice containing UTF-16 to the sink.

The implementor of the trait should not validate UTF-16. It’s the responsibility of the caller to pass valid UTF-16.

Provided Methods

fn write_char(&mut self, c: char) -> Result

Write a Unicode scalar value to the sink.

fn size_hint(&mut self, upcoming: usize) -> Result

A hint that the caller expects to write upcoming UTF-16 code units. The implementation must not assume upcoming to be exact. The caller may write more or fewer code units using write_slice() and write_char(). However, the caller should try to give reasonable estimates if it uses this method.

For Vec and SmallVec, this maps to reserve(). The default implementation does nothing.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Write16 for Vec<u16>

Available on crate feature alloc only.

fn write_slice(&mut self, s: &[u16]) -> Result

fn write_char(&mut self, c: char) -> Result

fn size_hint(&mut self, upcoming: usize) -> Result

impl<A: Array<Item = u16>> Write16 for SmallVec<A>

Available on crate feature smallvec only.

fn write_slice(&mut self, s: &[u16]) -> Result

fn write_char(&mut self, c: char) -> Result

fn size_hint(&mut self, upcoming: usize) -> Result

Implementors