openharmony_ci 21cf238325 !11 merge master into master
README.OpenSource修改

Created-by: dragonswordy
Commit-by: ljy9810
Merged-by: openharmony_ci
Description: ### 一、内容说明(相关的Issue)
https://gitcode.com/openharmony/third_party_rust_unicode-ident/issues/3


### 二、建议测试周期和提测地址  
  建议测试完成时间:xxxx.xx.xx  
  投产上线时间:xxxx.xx.xx  
  提测地址:CI环境/压测环境  
  测试账号:  

### 三、变更内容
  * 3.1 关联PR列表

  * 3.2 数据库和部署说明  
    1. 常规更新 
    2. 重启unicorn
    3. 重启sidekiq
    4. 迁移任务:是否有迁移任务,没有写 "无"
    5. rake脚本:`bundle exec xxx RAILS_ENV = production`;没有写 "无"

  * 3.4 其他技术优化内容(做了什么,变更了什么)
    - 重构了 xxxx 代码
    - xxxx 算法优化


  * 3.5 废弃通知(什么字段、方法弃用?)



  * 3.6  后向不兼容变更(是否有无法向后兼容的变更?)


  
### 四、研发自测点(自测哪些?冒烟用例全部自测?)
  自测测试结论:


### 五、测试关注点(需要提醒QA重点关注的、可能会忽略的地方)
  检查点:

| 需求名称 | 是否影响xx公共模块 | 是否需要xx功能 | 需求升级是否依赖其他子产品 |
|------|------------|----------|---------------|
| xxx  | 否          | 需要       | 不需要           |
|      |            |          |               |

  接口测试:

  性能测试:

  并发测试:

  其他:



See merge request: openharmony/third_party_rust_memoffset!11
2026-04-09 20:56:15 +08:00
2025-11-14 10:33:53 +08:00
2018-01-13 19:37:05 +02:00
2025-12-24 09:17:42 +08:00
2025-11-14 10:33:53 +08:00
2025-11-14 10:33:53 +08:00
2025-11-14 10:33:53 +08:00
2017-10-17 08:37:35 +03:00
2025-11-14 10:33:53 +08:00
2026-04-09 17:34:19 +08:00

memoffset

C-Like offset_of functionality for Rust structs.

Introduces the following macros:

  • offset_of! for obtaining the offset of a member of a struct.
  • offset_of_tuple! for obtaining the offset of a member of a tuple. (Requires Rust 1.20+)
  • offset_of_union! for obtaining the offset of a member of a union.
  • span_of! for obtaining the range that a field, or fields, span.

memoffset works under no_std environments.

If you're using a rustc version greater or equal to 1.77, this crate's offset_of!() macro simply forwards to core::mem::offset_of!().

Usage

Add the following dependency to your Cargo.toml:

[dependencies]
memoffset = "0.9"

These versions will compile fine with rustc versions greater or equal to 1.19.

Examples

use memoffset::{offset_of, span_of};

#[repr(C, packed)]
struct Foo {
    a: u32,
    b: u32,
    c: [u8; 5],
    d: u32,
}

fn main() {
    assert_eq!(offset_of!(Foo, b), 4);
    assert_eq!(offset_of!(Foo, d), 4+4+5);

    assert_eq!(span_of!(Foo, a),        0..4);
    assert_eq!(span_of!(Foo, a ..  c),  0..8);
    assert_eq!(span_of!(Foo, a ..= c),  0..13);
    assert_eq!(span_of!(Foo, ..= d),    0..17);
    assert_eq!(span_of!(Foo, b ..),     4..17);
}

Usage in constants

memoffset has support for compile-time offset_of! on rust>=1.65.

On versions below 1.77, this is an incomplete implementation with one caveat: Due to dependence on #![feature(const_refs_to_cell)], you cannot get the offset of a Cell field in a const-context.

S
Description
提供计算内存偏移量的支持 | A Rust library that provides support for calculating offsets in memory.
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