Tracking Issue for read_buf_at #140771
Description
Feature gate: #![feature(read_buf_at)]
This is a tracking issue for FileExt::read_buf_at() and related methods, providing positioned reads into unintialized buffers.
#![feature(read_buf)] adds support for reads into unintialized buffers via BorrowedBuf and BorrowedCursor. This feature expands that to reads from specific offsets.
Public API
// std::os::unix::fs trait FileExt { // [...] (existing methods) /// Equivalent to read_at() fn read_buf_at(&self, buf: BorrowedCursor<'_>, offset: u64) -> io::Result<()>; /// Equivalent to read_exact_at() fn read_buf_exact_at(&self, buf: BorrowedCursor<'_>, offset: u64) -> io::Result<()>; } // std::os::windows::fs trait FileExt { // [...] (existing methods) /// Equivalent to seek_read() fn seek_read_buf(&self, buf: BorrowedCursor<'_>, offset: u64) -> io::Result<()>; }Steps / History
- ACP: Positioned reads into uninitialized buffers (
FileExt::read_buf_at, ...) libs-team#581 - Implementation: Add
read_bufequivalents for positioned reads #140459 - Final comment period (FCP)1
- Stabilization PR
Unresolved Questions
#![feature(core_io_borrowed_buf)]changes before stabilization?#![feature(read_buf)]changes before stabilization?