Module buf 

缓冲区操作工具。

缓冲区（buffer）是任何包含一段字节序列的结构。字节 可能存储在连续内存中，也可能不连续。本模块提供了用于抽象缓冲区的 trait， 以及用于处理缓冲区类型的工具。

Buf, BufMut

这两个 trait 是抽象处理缓冲区的两个基础 trait。 可以把它们视为字节结构的迭代器。它们通过提供面向字节切片优化的 API， 在性能上优于 Iterator。

更多细节请参见 Buf 和 BufMut。

结构体

Chain

A Chain sequences two buffers.

IntoIter

Iterator over the bytes contained by the buffer.

Limit

A BufMut adapter which limits the amount of bytes that can be written to an underlying buffer.

Reader

A Buf adapter which implements io::Read for the inner value.

Take

A Buf adapter which limits the bytes read from an underlying buffer.

UninitSlice

Uninitialized byte slice.

Writer

A BufMut adapter which implements io::Write for the inner value.

Trait

Buf

Read bytes from a buffer.

BufMut

A trait for values that provide sequential write access to bytes.