Rollup merge of #22009 - japaric:no-mov, r=alexcrichton
If you were still using `MaybeOwnedVector`, update your code to use `CowVec`. [breaking-change] --- We already removed `MaybeOwned` (the string equivalent) long time ago and with a much shorter deprecation period. It's time to let go.
This commit is contained in:
Manish Goregaokar
commit
df7db970dc
3 changed files with 1 additions and 170 deletions
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@ -278,7 +278,6 @@
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#![feature(collections)]
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#![feature(core)]
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#![feature(io)]
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#![feature(path)]
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use self::LabelText::*;
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@ -287,8 +286,6 @@ use std::old_io;
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use std::string::CowString;
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use std::vec::CowVec;
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pub mod maybe_owned_vec;
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/// The text for a graphviz label on a node or edge.
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pub enum LabelText<'a> {
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/// This kind of label preserves the text directly as is.
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@ -1,165 +0,0 @@
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// Copyright 2014 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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#![unstable(feature = "rustc_private")]
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#![deprecated(since = "1.0.0", reason = "use std::vec::CowVec")]
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pub use self::MaybeOwnedVector::*;
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use std::cmp::Ordering;
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use std::default::Default;
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use std::fmt;
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use std::iter::FromIterator;
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use std::old_path::BytesContainer;
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use std::slice;
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// Note 1: It is not clear whether the flexibility of providing both
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// the `Growable` and `FixedLen` variants is sufficiently useful.
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// Consider restricting to just a two variant enum.
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// Note 2: Once Dynamically Sized Types (DST) lands, it might be
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// reasonable to replace this with something like `enum MaybeOwned<'a,
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// U: ?Sized>{ Owned(Box<U>), Borrowed(&'a U) }`; and then `U` could be
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// instantiated with `[T]` or `str`, etc. Of course, that would imply
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// removing the `Growable` variant, which relates to note 1 above.
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// Alternatively, we might add `MaybeOwned` for the general case but
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// keep some form of `MaybeOwnedVector` to avoid unnecessary copying
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// of the contents of `Vec<T>`, since we anticipate that to be a
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// frequent way to dynamically construct a vector.
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/// MaybeOwnedVector<'a,T> abstracts over `Vec<T>`, `&'a [T]`.
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///
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/// Some clients will have a pre-allocated vector ready to hand off in
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/// a slice; others will want to create the set on the fly and hand
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/// off ownership, via `Growable`.
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pub enum MaybeOwnedVector<'a,T:'a> {
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Growable(Vec<T>),
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Borrowed(&'a [T]),
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}
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/// Trait for moving into a `MaybeOwnedVector`
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pub trait IntoMaybeOwnedVector<'a,T> {
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/// Moves self into a `MaybeOwnedVector`
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fn into_maybe_owned(self) -> MaybeOwnedVector<'a,T>;
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}
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#[allow(deprecated)]
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impl<'a,T:'a> IntoMaybeOwnedVector<'a,T> for Vec<T> {
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#[allow(deprecated)]
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#[inline]
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fn into_maybe_owned(self) -> MaybeOwnedVector<'a,T> { Growable(self) }
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}
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#[allow(deprecated)]
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impl<'a,T> IntoMaybeOwnedVector<'a,T> for &'a [T] {
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#[allow(deprecated)]
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#[inline]
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fn into_maybe_owned(self) -> MaybeOwnedVector<'a,T> { Borrowed(self) }
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}
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impl<'a,T> MaybeOwnedVector<'a,T> {
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pub fn iter(&'a self) -> slice::Iter<'a,T> {
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match self {
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&Growable(ref v) => v.as_slice().iter(),
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&Borrowed(ref v) => v.iter(),
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}
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}
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pub fn len(&self) -> uint { self.as_slice().len() }
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#[allow(deprecated)]
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pub fn is_empty(&self) -> bool { self.len() == 0 }
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}
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impl<'a, T: PartialEq> PartialEq for MaybeOwnedVector<'a, T> {
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fn eq(&self, other: &MaybeOwnedVector<T>) -> bool {
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self.as_slice() == other.as_slice()
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}
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}
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impl<'a, T: Eq> Eq for MaybeOwnedVector<'a, T> {}
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impl<'a, T: PartialOrd> PartialOrd for MaybeOwnedVector<'a, T> {
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fn partial_cmp(&self, other: &MaybeOwnedVector<T>) -> Option<Ordering> {
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self.as_slice().partial_cmp(other.as_slice())
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}
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}
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impl<'a, T: Ord> Ord for MaybeOwnedVector<'a, T> {
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fn cmp(&self, other: &MaybeOwnedVector<T>) -> Ordering {
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self.as_slice().cmp(other.as_slice())
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}
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}
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// The `Vector` trait is provided in the prelude and is implemented on
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// both `&'a [T]` and `Vec<T>`, so it makes sense to try to support it
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// seamlessly. The other vector related traits from the prelude do
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// not appear to be implemented on both `&'a [T]` and `Vec<T>`. (It
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// is possible that this is an oversight in some cases.)
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//
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// In any case, with `Vector` in place, the client can just use
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// `as_slice` if they prefer that over `match`.
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impl<'b,T> AsSlice<T> for MaybeOwnedVector<'b,T> {
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fn as_slice<'a>(&'a self) -> &'a [T] {
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match self {
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&Growable(ref v) => v.as_slice(),
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&Borrowed(ref v) => v.as_slice(),
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}
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}
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}
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impl<'a,T> FromIterator<T> for MaybeOwnedVector<'a,T> {
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#[allow(deprecated)]
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fn from_iter<I:Iterator<Item=T>>(iterator: I) -> MaybeOwnedVector<'a,T> {
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// If we are building from scratch, might as well build the
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// most flexible variant.
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Growable(iterator.collect())
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}
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}
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impl<'a,T:fmt::Debug> fmt::Debug for MaybeOwnedVector<'a,T> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.as_slice().fmt(f)
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}
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}
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impl<'a, T: Clone> Clone for MaybeOwnedVector<'a, T> {
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#[allow(deprecated)]
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fn clone(&self) -> MaybeOwnedVector<'a, T> {
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match *self {
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Growable(ref v) => Growable(v.clone()),
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Borrowed(v) => Borrowed(v)
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}
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}
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}
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impl<'a, T> Default for MaybeOwnedVector<'a, T> {
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#[allow(deprecated)]
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fn default() -> MaybeOwnedVector<'a, T> {
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Growable(Vec::new())
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}
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}
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impl<'a> BytesContainer for MaybeOwnedVector<'a, u8> {
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fn container_as_bytes(&self) -> &[u8] {
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self.as_slice()
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}
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}
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impl<'a,T:Clone> MaybeOwnedVector<'a,T> {
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/// Convert `self` into a growable `Vec`, not making a copy if possible.
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pub fn into_vec(self) -> Vec<T> {
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match self {
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Growable(v) => v,
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Borrowed(v) => v.to_vec(),
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}
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}
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}
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@ -17,7 +17,6 @@ extern crate graphviz;
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extern crate "flate" as myflate;
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use graphviz::maybe_owned_vec::MaybeOwnedVector;
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use std::collections::{HashMap,HashSet};
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use std::cell::RefCell;
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use std::old_io::stdio::println;
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@ -35,7 +34,7 @@ use std::mem::size_of;
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static uni: &'static str = "Les Miséééééééérables";
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static yy: usize = 25us;
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static bob: Option<graphviz::maybe_owned_vec::MaybeOwnedVector<'static, isize>> = None;
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static bob: Option<std::vec::CowVec<'static, isize>> = None;
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// buglink test - see issue #1337.
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