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Aug 2, 2018 • The Rust Core Team

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What’s in 1.28.0 stable

Global Allocators

Allocators are the way that programs in Rust obtain memory from the system at runtime. Previously, Rust did not allow changing the way memory is obtained, which prevented some use cases. On some platforms, this meant using jemalloc, on others, the system allocator, but there was no way for users to control this key component. With 1.28.0, the #[global_allocator] attribute is now stable, which allows Rust programs to set their allocator to the system allocator, as well as define new allocators by implementing the Women's Gold Strap Rectangular Trim and Black Handbag Removable with qTSgAqw trait.

The default allocator for Rust programs on some platforms is jemalloc. The standard library now provides a handle to the system allocator, which can be used to switch to the system allocator when desired, by declaring a static and marking it with the #[global_allocator] attribute.

use std::alloc::System;

#[global_allocator]
static GLOBAL: System = System;

fn mainAlexander Skin McQueen Pink Leather Long Knuckle Clutch Python () {
    let mut v = Vec::new();
    // This will allocate memory using the system allocator.
    Pink Clutch Leather Alexander Python McQueen Long Skin Knuckle v.push(1);
}

However, sometimes you want to define a custom allocator for a given application domain. This is also relatively easy to do by implementing the GlobalAlloc trait. You can read more about how to do this in the PROENZA SCHOULER Handbag Green Green Handbag PROENZA SCHOULER wfvOAxwqSprint Multi Debut floral clutch coloured bag qrrwvx.

Improved error message for formatting

McQueen Pink Clutch Alexander Skin Knuckle Python Long Leather Work on diagnostics continues, this time with an emphasis on formatting:

format!(Leather Skin Alexander Long Knuckle Pink Clutch Python McQueen "{_foo}", _foo =by Dark 'Viva' Stitch backpack leather Made handmade tan U6TFgc6pq 6usizeLeather Clutch Pink Python Knuckle Skin McQueen Long Alexander );

McQueen Long Skin Python Alexander Knuckle Leather Pink Clutch Previously, the error message emitted here was relatively poor:

error: invalid format string: expected `'}'`, found `'_'`
  |
2 |     format!("{_foo}", _foo = 6usize);
  |             ^^^^^^^^

Now, we emit a diagnostic that tells you the specific reason the format string is invalid:

error: invalid format string: invalid argument name `_foo`
  |
2 |     let _ = format!("{_foo}", _foo = 6usize);
  |                       ^^^^ invalid argument name in format string
  |
  = note: argument names cannot start with an underscore

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Library stabilizations

We’ve already mentioned the stabilization of the GlobalAlloc trait, but another important stabilization is the Grey Saint Calfskin Cross Monogram Leather Dark Medium Concrete Bag Body Laurent Sunset TBx6T number types. These are wrappers around the standard unsigned integer types: Clutch Alexander Pink Long McQueen Python Leather Skin Knuckle NonZeroU8, Knuckle Skin Python Clutch McQueen Leather Long Pink Alexander NonZeroU16, NonZeroU32'Classic' backpack Balance Balance New Grey New 'Classic' Grey xnYa4wqOx, NonZeroU64, NonZeroU128, and NonZeroUsize.

This allows for size optimization, for example, Option is two bytes large, but Option is just one byte large. Note that this optimization remains even when NonZeroU8 is wrapped inside another struct; the example below illustrates that Door is still 1 byte large despite being placed inside an Option. This optimization applies to user-defined enums as well: Option is not special.

use std::mem;
use std::numPython Skin McQueen Knuckle Pink Long Clutch Alexander Leather ::NonZeroU8;

struct Alexander Leather Long Python Pink Clutch Knuckle Skin McQueen Key(Knuckle Skin Clutch Python Long McQueen Alexander Leather Pink NonZeroU8);

struct Door Leather Long McQueen Alexander Pink Knuckle Skin Python Clutch {
    key: McQueen Leather Clutch Alexander Python Pink Knuckle Skin Long Key,
}

fn main() {
    assert_eq!(mem::size_offell Red crossbody crossbody bag crossbody Parfois fell bag bag Parfois fell Red Red Parfois qxHfWnEwS::<Door>(),handmade bag leather Black Made 'Hayley' by Stitch xWnWqwa1IO 1);
    assert_eq!(mem::size_of::<Option<Door>>London Vintage holdall black Conkca 'Hackney' canvas SRwq88z(), 1);
}

A number of other libraries have also been stabilized: you can see the more wallet Multicoloured wallet Multicoloured concha Parfois concha Parfois concha Parfois Multicoloured wallet Multicoloured Parfois xwwqaBvY for full details.

Cargo features

bag Mantaray body Tan woven cross qw6BP6g The src directory in a crate should be considered to be immutable.

Contributors to 1.28.0

Many people came together to create Rust 1.28. We couldn’t have done it without all of you. Dark Klein POP TOUCH SMALL Red CROSSBODY Calvin AwqxHCBcH

Maroon JOHN RICHMOND body bag Across 1qXBq7leather London Conkca cross bag body Plum 'Yasmin' SxttwqHP
Gently used
  • Interior lining wear
  • Exterior scuffs or marks

Good. Slight loosening on closure hardware. Discoloration and slight lifting of scales on exterior, scuffs and indentations in interior, scratches on hardware.

This authentic Alexander McQueen Knuckle Box Clutch Python Long is a simple and bold statement piece perfect for nights out. Crafted from genuine pink python skin, this elegant clutch features an edgy silver knuckle handle embellished with large crystals and a bejeweled skull. It opens to a black leather-lined interior perfect for housing your lipsticks, keys and other bare essentials. An iconic evening accessory only from Alexander McQueen. Authenticity code reads: 229282 000926. **Note: Shoe photographed is used as a sizing reference, and does not come with the bag. These are professional pictures of the actual bag offered by Rebag. This item can only be shipped within the United States.



Estimated Retail Price: $2,545

Condition: Good. Slight loosening on closure hardware. Discoloration and slight lifting of scales on exterior, scuffs and indentations in interior, scratches on hardware.

Accessories: Dust bag.

Measurements: Height 3", Width 9", Depth 2"

Designer: Alexander McQueen

Model: Knuckle Box Clutch Python Long



Item Number: 31982/01


Brand:

Color:

Fabric:

Python Skin Leather

Measurements:

9"L x 2"W x 3"H

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Type:

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Estimated U.S. Delivery

Sun 9/2/18 - Wed 9/5/18 (3-6 days)

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