Instead of probing for all possible impls that could have caused an
`ImplObligation`, keep track of its `DefId` and obligation spans for
accurate error reporting.
Follow up to #89580. Addresses #89418.
Remove some unnecessary clones.
Tweak output for auto trait impl obligations.
This enhances documentation with these details and extends the validator to check these requirements
more thoroughly. As a part of this, we add a new `Deaggregated` phase, and rename other phases so
that their names more naturally correspond to what they represent.
There are a few places were we have to construct it, though, and a few
places that are more invasive to change. To do this, we create a
constructor with a long obvious name.
fix typos
Rework of #94603 which got closed as I was trying to unmerge and repush. This is a subset of changes from the original pr as I sed'd whatever typos I remembered from the original PR
thanks to `@cuishuang` for the original PR
Improve `expect` impl and handle `#[expect(unfulfilled_lint_expectations)]` (RFC 2383)
This PR updates unstable `ExpectationIds` in stashed diagnostics and adds some asserts to ensure that the stored expectations are really empty in the end. Additionally, it handles the `#[expect(unfulfilled_lint_expectations)]` case.
According to the [Errors and lints docs](https://rustc-dev-guide.rust-lang.org/diagnostics.html#diagnostic-levels) the `error` level should only be used _"when the compiler detects a problem that makes it unable to compile the program"_. As this isn't the case with `#[expect(unfulfilled_lint_expectations)]` I decided to only create a warning. To avoid adding a new lint only for this case, I simply emit a `unfulfilled_lint_expectations` diagnostic with an additional note.
---
r? `@wesleywiser` I'm requesting a review from you since you reviewed the previous PR https://github.com/rust-lang/rust/pull/87835. You are welcome to reassign it if you're busy 🙃
rfc: [RFC-2383](https://rust-lang.github.io/rfcs/2383-lint-reasons.html)
tracking issue: https://github.com/rust-lang/rust/issues/85549
cc: `@flip1995` In case you're also interested in this :)
Type params and assoc types have unit metadata if they are sized
Extend the logic in `Pointee` projection to ensure that we can satisfy `<T as Pointee>::Metadata = ()` if `T: Sized`.
cc: `@SimonSapin` and #93959
Return early to fix ICE
This fixes#94627, ICE happens because compiler tries to suggest constraining type parameter but the only constraint is implicit `std::Sized` one, so it gets removed and there is nothing to suggest resulting in ICE.
Improve `AdtDef` interning.
This commit makes `AdtDef` use `Interned`. Much of the commit is tedious
changes to introduce getter functions. The interesting changes are in
`compiler/rustc_middle/src/ty/adt.rs`.
r? `@fee1-dead`
CTFE/Miri: detect out-of-bounds pointers in offset_from
Also I became uneasy with aggressively doing `try_to_int` here -- this will always succeed on Miri, leading to the wrong codepath being taken. We should rather try to convert them both to pointers, and use the integer path as a fallback, so that's what I implemented now.
Hiding whitespaces helps with the diff.
Fixes https://github.com/rust-lang/miri/issues/1950
r? ``@oli-obk``
Change several HashMaps to IndexMap to improve incremental hashing performance
Stable hashing hash maps in incremental mode takes a lot of time, especially for some benchmarks like `clap`. As noted by `@Mark-Simulacrum` [here](https://github.com/rust-lang/rust/pull/89404#issuecomment-950043892), this cost could be reduced by replacing some hash maps by indexmaps.
I gathered some statistics and found several hash maps that took a lot of time to hash and replaced them by indexmaps. However, in order for this to work, we need to make sure that these indexmaps have deterministic insertion order. These three are used only in visitors as far as I can see, which seems deterministic. Can we enforce this somehow? Or should some explaining comment be included for these maps?
This commit makes `AdtDef` use `Interned`. Much the commit is tedious
changes to introduce getter functions. The interesting changes are in
`compiler/rustc_middle/src/ty/adt.rs`.
mir-opt: Replace clone on primitives with copy
We can't do it for everything, but it would be nice to at least stop making calls to clone methods in debug from things like derived-clones.
r? `@ghost`
This updates the standard library's documentation to use the new syntax. The
documentation is worthwhile to update as it should be more idiomatic
(particularly for features like this, which are nice for users to get acquainted
with). The general codebase is likely more hassle than benefit to update: it'll
hurt git blame, and generally updates can be done by folks updating the code if
(and when) that makes things more readable with the new format.
A few places in the compiler and library code are updated (mostly just due to
already having been done when this commit was first authored).
diagnostics: use rustc_on_unimplemented to recommend `[].iter()`
To make this work, the `#[rustc_on_unimplemented]` data needs to be used to
report method resolution errors, which is most of what this commit does.
Fixes#94581
This change is somewhat extensive, since it affects MIR -- since this is called to determine Copy vs Move -- so any test that's `no_core` needs to actually have the normal `impl`s it uses.
