Trait CharFormat

pub unsafe trait CharFormat<'a>: Format {
    type Iter: Iterator<Item = (usize, char)>;

    // Required methods
    unsafe fn char_indices(buf: &'a [u8]) -> Self::Iter;
    fn encode_char<F>(ch: char, cont: F) -> Result<(), ()>
       where F: FnOnce(&[u8]);
}

Indicates a format which contains characters from Unicode (all of it, or some proper subset).

Required Associated Types

type Iter: Iterator<Item = (usize, char)>

Iterator for characters and their byte indices.

Required Methods

unsafe fn char_indices(buf: &'a [u8]) -> Self::Iter

Iterate over the characters of the string and their byte indices.

You may assume the buffer is already validated for Format.

fn encode_char<F>(ch: char, cont: F) -> Result<(), ()>

where F: FnOnce(&[u8]),

Encode the character as bytes and pass them to a continuation.

Returns Err(()) iff the character cannot be represented.

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.

Implementors

impl<'a> CharFormat<'a> for ASCII

type Iter = SingleByteCharIndices<'a>

impl<'a> CharFormat<'a> for Latin1

type Iter = SingleByteCharIndices<'a>

impl<'a> CharFormat<'a> for UTF8

type Iter = CharIndices<'a>