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Add an implicit Self: ~const Trait bound on default_method_body_is_const methods #92228

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Add an implicit Self: ~const Trait bound on default_method_body_is_const methods #92228

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@fee1-dead fee1-dead commented Dec 23, 2021 •
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Closes #92158

r? @oli-obk

Do not r+ before I prepare a const_cmp PR.

@rustbot rustbot added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Dec 23, 2021
@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Dec 23, 2021
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The job mingw-check failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot) 
configure: rust.debug-assertions := True
configure: rust.overflow-checks := True
configure: llvm.assertions      := True
configure: dist.missing-tools   := True
configure: build.configure-args := ['--enable-sccache', '--disable-manage-submodu ...
configure: writing `config.toml` in current directory
configure: 
configure: run `python /checkout/x.py --help`
configure: 
---
* 361 features
some tidy checks failed


command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/rust-tidy" "/checkout" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "/checkout/obj/build" "16"


Build completed unsuccessfully in 0:00:11

oli-obk
oli-obk requested changes Dec 23, 2021
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I think we need to start looking into improving diagnostics soon xD

library/core/src/cmp.rs
#[inline]
fn partial_cmp(&self, other: &$t) -> Option<Ordering> {
Some(self.cmp(other))
Some(if *self < *other { Less }
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Please add a const hack comment here

This was referenced Dec 26, 2021
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bors commented Feb 13, 2022

☔ The latest upstream changes (presumably #93956) made this pull request unmergeable. Please resolve the merge conflicts.

@oli-obk oli-obk added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2022
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Jul 25, 2022
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Rollup merge of rust-lang#92390 - fee1-dead-contrib:const_cmp, r=oli-obk
5509e42 
Constify a few `(Partial)Ord` impls

Only a few `impl`s are constified for now, as rust-lang#92257 has not landed in the bootstrap compiler yet and quite a few impls would need that fix.

This unblocks rust-lang#92228, which unblocks marking iterator methods as `default_method_body_is_const`.
JohnTitor added a commit to JohnTitor/rust that referenced this pull request Jul 25, 2022
@JohnTitor
Rollup merge of rust-lang#92390 - fee1-dead-contrib:const_cmp, r=oli-obk
c1647e1 
Constify a few `(Partial)Ord` impls

Only a few `impl`s are constified for now, as rust-lang#92257 has not landed in the bootstrap compiler yet and quite a few impls would need that fix.

This unblocks rust-lang#92228, which unblocks marking iterator methods as `default_method_body_is_const`.
@fee1-dead fee1-dead closed this Jul 26, 2022
@fee1-dead fee1-dead deleted the dmbic-implied-bounds branch July 26, 2022 14:12
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const_trait_impl: investigate how to put Self: ~const Trait bounds in traits
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