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e7525cf620
This commit revises `path` and `os_str` to use blanket impls for `From` on reference types. This both cuts down on the number of required impls, and means that you can pass through e.g. `T: AsRef<OsStr>` to `PathBuf::from` without an intermediate call to `as_ref`. It also makes a FIXME note for later generalizing the blanket impls for `AsRef` and `AsMut` to use `Deref`/`DerefMut`, once it is possible to do so.
83 lines
1.9 KiB
Rust
83 lines
1.9 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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/// The underlying OsString/OsStr implementation on Unix systems: just
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/// a `Vec<u8>`/`[u8]`.
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use core::prelude::*;
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use borrow::Cow;
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use fmt::{self, Debug};
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use vec::Vec;
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use str;
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use string::String;
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use mem;
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#[derive(Clone, Hash)]
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pub struct Buf {
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pub inner: Vec<u8>
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}
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pub struct Slice {
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pub inner: [u8]
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}
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impl Debug for Slice {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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self.to_string_lossy().fmt(formatter)
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}
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}
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impl Debug for Buf {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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self.as_slice().fmt(formatter)
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}
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}
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impl Buf {
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pub fn from_string(s: String) -> Buf {
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Buf { inner: s.into_bytes() }
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}
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pub fn as_slice(&self) -> &Slice {
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unsafe { mem::transmute(&*self.inner) }
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}
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pub fn into_string(self) -> Result<String, Buf> {
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String::from_utf8(self.inner).map_err(|p| Buf { inner: p.into_bytes() } )
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}
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pub fn push_slice(&mut self, s: &Slice) {
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self.inner.push_all(&s.inner)
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}
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}
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impl Slice {
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fn from_u8_slice(s: &[u8]) -> &Slice {
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unsafe { mem::transmute(s) }
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}
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pub fn from_str(s: &str) -> &Slice {
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Slice::from_u8_slice(s.as_bytes())
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}
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pub fn to_str(&self) -> Option<&str> {
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str::from_utf8(&self.inner).ok()
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}
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pub fn to_string_lossy(&self) -> Cow<str> {
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String::from_utf8_lossy(&self.inner)
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}
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pub fn to_owned(&self) -> Buf {
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Buf { inner: self.inner.to_vec() }
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}
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}
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