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Matthias Krüger ab1fa19d08
Rollup merge of #121047 - compiler-errors:default-impls, r=lcnr 
Do not assemble candidates for default impls

There is no reason (as far as I can tell?) that we should assemble an impl candidate for a default impl. This candidate itself does not prove that the impl holds, and any time that it *does* hold, there will be a more specializing non-default impl that also is assembled.

This is because `default impl<T> Foo for T {}` actually expands to `impl<T> Foo for T where T: Foo {}`. The only way to satisfy that where clause (without coinduction) is via *another* implementation that does hold -- precisely an impl that specializes it.

This should fix the specialization related regressions for #116494. That should lead to one root crate regression that doesn't have to do with specialization, which I think we can regress.

r? lcnr cc ``@rust-lang/types``

cc #31844
2024-02-13 22:51:57 +01:00
.github Downgrade Xcode from the default (15.0) to 14.3.1. 2024-02-10 20:59:20 -08:00
.reuse Rollup merge of #119189 - henrispriet:move-installing-from-source, r=Mark-Simulacrum 2024-01-13 22:35:08 +01:00
compiler Rollup merge of #121047 - compiler-errors:default-impls, r=lcnr 2024-02-13 22:51:57 +01:00
library Fix incorrect use of compile_fail 2024-02-13 14:03:59 -05:00
LICENSES Add missing CC-BY-SA-4.0. 2023-11-27 11:03:53 +00:00
src Rollup merge of #120999 - fmease:rustdoc-rm-instantiation-param, r=notriddle 2024-02-13 22:51:54 +01:00
tests Rollup merge of #121047 - compiler-errors:default-impls, r=lcnr 2024-02-13 22:51:57 +01:00
.editorconfig Only use max_line_length = 100 for *.rs 2023-07-10 15:18:36 -07:00
.git-blame-ignore-revs Ignore let-chains formatting 2023-10-15 18:30:34 +00:00
.gitattributes Rename config.toml.example to config.example.toml 2023-03-11 14:10:00 -08:00
.gitignore don't globally ignore rustc-ice files 2023-09-16 09:44:44 +02:00
.gitmodules Update to LLVM 18 2024-02-13 10:33:40 +01:00
.mailmap correct my mailmap entry 2024-01-21 20:47:26 -05:00
Cargo.lock Update compiler-builtins 2024-02-13 10:33:40 +01:00
Cargo.toml fix typo 2024-01-09 22:44:32 +01:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
config.example.toml add a new optimized_compiler_builtins option 2024-01-07 13:04:40 +03:00
configure Enforce Python 3 as much as possible 2020-04-10 09:09:58 -04:00
CONTRIBUTING.md fix: Update CONTRIBUTING.md recommend -> recommended 2023-11-16 23:57:09 +05:30
COPYRIGHT Update COPYRIGHT file 2022-10-30 10:23:14 -04:00
INSTALL.md Move section "Installing from Source" to seperate file 2024-01-13 17:22:55 +01:00
LICENSE-APACHE Remove appendix from LICENCE-APACHE 2019-12-30 14:25:53 +00:00
LICENSE-MIT LICENSE-MIT: Remove inaccurate (misattributed) copyright notice 2017-07-26 16:51:58 -07:00
README.md Update Readme 2024-01-15 13:57:29 -08:00
RELEASES.md Remove duplicate release note 2024-02-09 12:31:32 -05:00
rust-bors.toml Add integration for new bors 2023-09-28 10:43:24 +02:00
rustfmt.toml rustfmt.toml: don't ignore just any tests path, only root one 2024-01-11 14:59:59 +03:00
triagebot.toml Rollup merge of #121043 - lcnr:lcnr-compiler-assign, r=fmease 2024-02-13 22:51:56 +01:00
x Make x capable of resolving symlinks 2023-10-14 17:53:33 +03:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Fix recent python linting errors 2023-08-02 04:40:28 -04:00

README.md

The Rust Programming Language

Rust Community

This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

Note: this README is for users rather than contributors. If you wish to contribute to the compiler, you should read CONTRIBUTING.md instead.

Table of Contents

Quick Start

Read "Installation" from The Book.

Installing from Source

If you really want to install from source (though this is not recommended), see INSTALL.md.

Getting Help

See https://www.rust-lang.org/community for a list of chat platforms and forums.

Contributing

See CONTRIBUTING.md.

License

Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.

Trademark

The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").

If you want to use these names or brands, please read the media guide.

Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.