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Add PartialEq and Eq to Cursor #67233
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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @sfackler (or someone else) soon. If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes. Please see the contribution instructions for more information. |
The job Click to expand the log.
I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact |
@rfcbot fcp merge |
Team member @sfackler has proposed to merge this. The next step is review by the rest of the tagged team members: No concerns currently listed. Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up! See this document for info about what commands tagged team members can give me. |
Could you give an example of how you’d use this and why it’s useful? If |
I personally need it for testing. It is easier to read assert_eq!(Cursor::new(vec![2, 3, 4]), Cursor::new(vec![2, 3, 4])); than assert_eq!(Cursor::new(vec![2, 3, 4]).get_ref(), Cursor::new(vec![2, 3, 4]).get_ref()); In my case I have a struct, that wraps around a reader, where it only implements This is the wrapper I am talking about: PartialEq for Mutex is WIP... |
Could this also be defined with |
🔔 This is now entering its final comment period, as per the review above. 🔔 |
Please squash the commits into one. After that, I think this'll be ready for approval (modulo FCP concluding in ~1 day). |
Could you tell me how to do this correctly please? (I never did this) |
I recommend Let me know if you need further help! |
@Mark-Simulacrum Thank you for your friendly and helpful response :) |
The final comment period, with a disposition to merge, as per the review above, is now complete. As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed. The RFC will be merged soon. |
@bors r+ |
📌 Commit 89986a3 has been approved by |
🌲 The tree is currently closed for pull requests below priority 100, this pull request will be tested once the tree is reopened |
Add PartialEq and Eq to Cursor closes rust-lang#67226
Add PartialEq and Eq to Cursor closes rust-lang#67226
Add PartialEq and Eq to Cursor closes rust-lang#67226
Rollup of 8 pull requests Successful merges: - #67233 (Add PartialEq and Eq to Cursor) - #67466 (Require const stability attributes on intrinsics to be able to use them in constant contexts) - #67507 (Remove mem::uninitalized from tests) - #67527 (Results show too much) - #67536 (Move `{hir::lowering -> hir}::is_range_literal`) - #67538 (Improve diagnostics for invalid assignment) - #67546 (Fix ICE in mir interpretation) - #67559 (Document that calling Drop, even after it panics, is UB) Failed merges: r? @ghost
Version 1.42.0 (2020-03-12) ========================== Language -------- - [You can now use the slice pattern syntax with subslices.][67712] e.g. ```rust fn foo(words: &[&str]) { match words { ["Hello", "World", "!", ..] => println!("Hello World!"), ["Foo", "Bar", ..] => println!("Baz"), rest => println!("{:?}", rest), } } ``` - [You can now use `#[repr(transparent)]` on univariant `enum`s.][68122] Meaning that you can create an enum that has the exact layout and ABI of the type it contains. - [There are some *syntax-only* changes:][67131] - `default` is syntactically allowed before items in `trait` definitions. - Items in `impl`s (i.e. `const`s, `type`s, and `fn`s) may syntactically leave out their bodies in favor of `;`. - Bounds on associated types in `impl`s are now syntactically allowed (e.g. `type Foo: Ord;`). - `...` (the C-variadic type) may occur syntactically directly as the type of any function parameter. These are still rejected *semantically*, so you will likely receive an error but these changes can be seen and parsed by procedural macros and conditional compilation. Compiler -------- - [Added tier 2* support for `armv7a-none-eabi`.][68253] - [Added tier 2 support for `riscv64gc-unknown-linux-gnu`.][68339] - [`Option::{expect,unwrap}` and `Result::{expect, expect_err, unwrap, unwrap_err}` now produce panic messages pointing to the location where they were called, rather than `core`'s internals. ][67887] * Refer to Rust's [platform support page][forge-platform-support] for more information on Rust's tiered platform support. Libraries --------- - [`iter::Empty<T>` now implements `Send` and `Sync` for any `T`.][68348] - [`Pin::{map_unchecked, map_unchecked_mut}` no longer require the return type to implement `Sized`.][67935] - [`io::Cursor` now derives `PartialEq` and `Eq`.][67233] - [`Layout::new` is now `const`.][66254] - [Added Standard Library support for `riscv64gc-unknown-linux-gnu`.][66899] Stabilized APIs --------------- - [`CondVar::wait_while`] - [`CondVar::wait_timeout_while`] - [`DebugMap::key`] - [`DebugMap::value`] - [`ManuallyDrop::take`] - [`matches!`] - [`ptr::slice_from_raw_parts_mut`] - [`ptr::slice_from_raw_parts`] Cargo ----- - [You no longer need to include `extern crate proc_macro;` to be able to `use proc_macro;` in the `2018` edition.][cargo/7700] Compatibility Notes ------------------- - [`Error::description` has been deprecated, and its use will now produce a warning.][66919] It's recommended to use `Display`/`to_string` instead. - [`use $crate;` inside macros is now a hard error.][37390] The compiler emitted forward compatibility warnings since Rust 1.14.0. - [As previously announced, this release reduces the level of support for 32-bit Apple targets to tier 3.][apple-32bit-drop]. This means that the source code is still available to build, but the targets are no longer tested and no release binary is distributed by the Rust project. Please refer to the linked blog post for more information. [37390]: rust-lang/rust#37390 [68253]: rust-lang/rust#68253 [68348]: rust-lang/rust#68348 [67935]: rust-lang/rust#67935 [68339]: rust-lang/rust#68339 [68122]: rust-lang/rust#68122 [67712]: rust-lang/rust#67712 [67887]: rust-lang/rust#67887 [67131]: rust-lang/rust#67131 [67233]: rust-lang/rust#67233 [66899]: rust-lang/rust#66899 [66919]: rust-lang/rust#66919 [66254]: rust-lang/rust#66254 [cargo/7700]: rust-lang/cargo#7700 [`DebugMap::key`]: https://doc.rust-lang.org/stable/std/fmt/struct.DebugMap.html#method.key [`DebugMap::value`]: https://doc.rust-lang.org/stable/std/fmt/struct.DebugMap.html#method.value [`ManuallyDrop::take`]: https://doc.rust-lang.org/stable/std/mem/struct.ManuallyDrop.html#method.take [`matches!`]: https://doc.rust-lang.org/stable/std/macro.matches.html [`ptr::slice_from_raw_parts_mut`]: https://doc.rust-lang.org/stable/std/ptr/fn.slice_from_raw_parts_mut.html [`ptr::slice_from_raw_parts`]: https://doc.rust-lang.org/stable/std/ptr/fn.slice_from_raw_parts.html [`CondVar::wait_while`]: https://doc.rust-lang.org/stable/std/sync/struct.Condvar.html#method.wait_while [`CondVar::wait_timeout_while`]: https://doc.rust-lang.org/stable/std/sync/struct.Condvar.html#method.wait_timeout_while
closes #67226