Struct FnMutChunkSource 

pub struct FnMutChunkSource<'s, F, B, E>
where
    F: FnMut() -> Option<Result<B, E>>,
    B: AsRef<[u8]> + 's,
{ /* private fields */ }

A ChunkSource implementation that wraps a mutable closure (FnMut).

This struct is generic over a lifetime 's, the closure type F, the chunk type B, and the error type E. It correctly handles the lifetime of the returned chunks, which are guaranteed to live at least as long as the 's lifetime associated with the struct.

Implementations

impl<'s, F, B, E> FnMutChunkSource<'s, F, B, E>

where F: FnMut() -> Option<Result<B, E>>, B: AsRef<[u8]> + 's,

pub fn new(closure: F) -> Self

Creates a new FnMutChunkSource.

This function takes a closure F that will be used to generate chunks. The closure must return Option<Result<B, E>>, where B is a type that can be borrowed as a &[u8] and E is the error type.

Trait Implementations

impl<'s, F, B, E> ChunkSource for FnMutChunkSource<'s, F, B, E>

where F: FnMut() -> Option<Result<B, E>>, B: AsRef<[u8]> + 's,

type Error = E

The type of error that can occur when reading a chunk.

type Chunk<'a> = B where Self: 'a

The type of chunk returned, which must implement AsRef<u8>

fn next_chunk<'a>(&'a mut self) -> Option<Result<Self::Chunk<'a>, Self::Error>>

Get the next chunk of bytes.