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libs: add Deref, DerefMut impls for references, fixing a bug in compiler in the process that was blocking this.
r? @aturon
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the process that was blocking this.
Fixes #18621.
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Closes #16529
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Fixes #18387.
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This to avoid warning: unused variable: `from`,
#[warn(unused_variable)] on by default.
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It shows error: failed to resolve. Maybe a missing `extern crate core`
anyway.
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Because var is provided as an index not a right hand side.
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Also convert a number of `static mut` to just a plain old `static` and remove
some unsafe blocks.
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[breaking-change]
If you are using slicing syntax you will need to add #![feature(slicing_syntax)] to your crate.
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This reverts commit df2f1fa7680a86ba228f004e7de731e91a1df1fe.
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This reverts commit 95cfc35607ccf5f02f02de56a35a9ef50fa23a82.
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[breaking-change]
If you are using slicing syntax you will need to add #![feature(slicing_syntax)] to your crate.
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Deprecates slicing methods from ImmutableSlice/MutableSlice in favour of slicing syntax or the methods in Slice/SliceMut.
Closes #17273.
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The syntax sugar is `[mut from..to]` not `[from..to]`
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`expr[]`, `expr[expr..]`, `expr[..expr]`,`expr[expr..expr]`
Uses the Slice and SliceMut traits.
Allows ... as well as .. in range patterns.
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This adds support for lint groups to the compiler. Lint groups are a way of
grouping a number of lints together under one name. For example, this also
defines a default lint for naming conventions, named `bad_style`. Writing
`#[allow(bad_style)]` is equivalent to writing
`#[allow(non_camel_case_types, non_snake_case, non_uppercase_statics)]`. These
lint groups can also be defined as a compiler plugin using the new
`Registry::register_lint_group` method.
This also adds two built-in lint groups, `bad_style` and `unused`. The contents
of these groups can be seen by running `rustc -W help`.
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This is done entirely in the libraries for functions up to 16 arguments.
A macro is used so that more arguments can be easily added if we need.
Note that I had to adjust the overloaded call algorithm to not try
calling the overloaded call operator if the callee is a built-in
function type, to prevent loops.
Closes #15448.
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At the moment, writing generic functions for integer types that involve shifting is rather verbose. For example, a function at shifts an integer left by 1 currently requires
use std::num::One;
fn f<T: Int>(x : T) -> T {
x << One::one()
}
If the shift amount is not 1, it's even worse:
use std::num::FromPrimitive;
fn f<T: Int + FromPrimitive>(x: T) -> T {
x << FromPrimitive::from_int(2).unwrap()
}
This patch allows the much simpler implementation
fn f<T: Int>(x: T) -> T {
x << 2
}
It accomplishes this by changing the built-in integer types (and the `Int` trait) to implement `Shl<uint, T>` instead of `Shl<T, T>` as it currently is defined. Note that the internal implementations of `shl` already cast the right-hand side to `uint`. `BigInt` also implements `Shl<uint, BigInt>`, so this increases consistency.
All of the above applies similarly to right shifts, i.e., `Shr<uint, T>`.
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Closes #15544
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This will break code that used the old `Index` trait. Change this code
to use the new `Index` traits. For reference, here are their signatures:
pub trait Index<Index,Result> {
fn index<'a>(&'a self, index: &Index) -> &'a Result;
}
pub trait IndexMut<Index,Result> {
fn index_mut<'a>(&'a mut self, index: &Index) -> &'a mut Result;
}
Closes #6515.
[breaking-change]
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Libcore's test infrastructure is complicated by the fact that many lang
items are defined in the crate. The current approach (realcore/realstd
imports) is hacky and hard to work with (tests inside of core::cmp
haven't been run for months!).
Moving tests to a separate crate does mean that they can only test the
public API of libcore, but I don't feel that that is too much of an
issue. The only tests that I had to get rid of were some checking the
various numeric formatters, but those are also exercised through normal
format! calls in other tests.
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This change starts denying `*T` in the parser. All code using `*T` should ensure
that the FFI call does indeed take `const T*` on the other side before renaming
the type to `*const T`.
Otherwise, all code can rename `*T` to `*const T`.
[breaking-change]
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This breaks a fair amount of code. The typical patterns are:
* `for _ in range(0, 10)`: change to `for _ in range(0u, 10)`;
* `println!("{}", 3)`: change to `println!("{}", 3i)`;
* `[1, 2, 3].len()`: change to `[1i, 2, 3].len()`.
RFC #30. Closes #6023.
[breaking-change]
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gate.
This is part of unboxed closures.
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Closes #12925
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This commit moves reflection (as well as the {:?} format modifier) to a new
libdebug crate, all of which is marked experimental.
This is a breaking change because it now requires the debug crate to be
explicitly linked if the :? format qualifier is used. This means that any code
using this feature will have to add `extern crate debug;` to the top of the
crate. Any code relying on reflection will also need to do this.
Closes #12019
[breaking-change]
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This only changes the directory names; it does not change the "real"
metadata names.
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As requested on the mailing list: https://mail.mozilla.org/pipermail/rust-dev/2013-April/003713.html
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correct handling of moves for struct-record update.
Part of #3678. Fixes #2828, #3904, #4719.
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borrow checker to support this. r=nmatsakis
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