9a4f43b9b6
This commit stabilizes and deprecates the FCP (final comment period) APIs for
the upcoming 1.7 beta release. The specific APIs which changed were:
Stabilized
* `Path::strip_prefix` (renamed from `relative_from`)
* `path::StripPrefixError` (new error type returned from `strip_prefix`)
* `Ipv4Addr::is_loopback`
* `Ipv4Addr::is_private`
* `Ipv4Addr::is_link_local`
* `Ipv4Addr::is_multicast`
* `Ipv4Addr::is_broadcast`
* `Ipv4Addr::is_documentation`
* `Ipv6Addr::is_unspecified`
* `Ipv6Addr::is_loopback`
* `Ipv6Addr::is_unique_local`
* `Ipv6Addr::is_multicast`
* `Vec::as_slice`
* `Vec::as_mut_slice`
* `String::as_str`
* `String::as_mut_str`
* `<[T]>::clone_from_slice` - the `usize` return value is removed
* `<[T]>::sort_by_key`
* `i32::checked_rem` (and other signed types)
* `i32::checked_neg` (and other signed types)
* `i32::checked_shl` (and other signed types)
* `i32::checked_shr` (and other signed types)
* `i32::saturating_mul` (and other signed types)
* `i32::overflowing_add` (and other signed types)
* `i32::overflowing_sub` (and other signed types)
* `i32::overflowing_mul` (and other signed types)
* `i32::overflowing_div` (and other signed types)
* `i32::overflowing_rem` (and other signed types)
* `i32::overflowing_neg` (and other signed types)
* `i32::overflowing_shl` (and other signed types)
* `i32::overflowing_shr` (and other signed types)
* `u32::checked_rem` (and other unsigned types)
* `u32::checked_neg` (and other unsigned types)
* `u32::checked_shl` (and other unsigned types)
* `u32::saturating_mul` (and other unsigned types)
* `u32::overflowing_add` (and other unsigned types)
* `u32::overflowing_sub` (and other unsigned types)
* `u32::overflowing_mul` (and other unsigned types)
* `u32::overflowing_div` (and other unsigned types)
* `u32::overflowing_rem` (and other unsigned types)
* `u32::overflowing_neg` (and other unsigned types)
* `u32::overflowing_shl` (and other unsigned types)
* `u32::overflowing_shr` (and other unsigned types)
* `ffi::IntoStringError`
* `CString::into_string`
* `CString::into_bytes`
* `CString::into_bytes_with_nul`
* `From<CString> for Vec<u8>`
* `From<CString> for Vec<u8>`
* `IntoStringError::into_cstring`
* `IntoStringError::utf8_error`
* `Error for IntoStringError`
Deprecated
* `Path::relative_from` - renamed to `strip_prefix`
* `Path::prefix` - use `components().next()` instead
* `os::unix::fs` constants - moved to the `libc` crate
* `fmt::{radix, Radix, RadixFmt}` - not used enough to stabilize
* `IntoCow` - conflicts with `Into` and may come back later
* `i32::{BITS, BYTES}` (and other integers) - not pulling their weight
* `DebugTuple::formatter` - will be removed
* `sync::Semaphore` - not used enough and confused with system semaphores
Closes #23284
cc #27709 (still lots more methods though)
Closes #27712
Closes #27722
Closes #27728
Closes #27735
Closes #27729
Closes #27755
Closes #27782
Closes #27798
53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// Test that an `&mut self` method, when invoked on an lvalue whose
|
|
// type is `&mut [u8]`, passes in a pointer to the lvalue and not a
|
|
// temporary. Issue #19147.
|
|
|
|
use std::slice;
|
|
use std::cmp;
|
|
|
|
trait MyWriter {
|
|
fn my_write(&mut self, buf: &[u8]) -> Result<(), ()>;
|
|
}
|
|
|
|
impl<'a> MyWriter for &'a mut [u8] {
|
|
fn my_write(&mut self, buf: &[u8]) -> Result<(), ()> {
|
|
let amt = cmp::min(self.len(), buf.len());
|
|
self[..amt].clone_from_slice(&buf[..amt]);
|
|
|
|
let write_len = buf.len();
|
|
unsafe {
|
|
*self = slice::from_raw_parts_mut(
|
|
self.as_mut_ptr().offset(write_len as isize),
|
|
self.len() - write_len
|
|
);
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let mut buf = [0; 6];
|
|
|
|
{
|
|
let mut writer: &mut [_] = &mut buf;
|
|
writer.my_write(&[0, 1, 2]).unwrap();
|
|
writer.my_write(&[3, 4, 5]).unwrap();
|
|
}
|
|
|
|
// If `my_write` is not modifying `buf` in place, then we will
|
|
// wind up with `[3, 4, 5, 0, 0, 0]` because the first call to
|
|
// `my_write()` doesn't update the starting point for the write.
|
|
|
|
assert_eq!(buf, [0, 1, 2, 3, 4, 5]);
|
|
}
|