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This commit breaks out the logic of placheolder rewriting
into its own preprocessing step.
The only functional change from this is that the preprocessing
step (where extra `r: 'static` constraints are added) is
performed upstream of Polonius legacy, finally affecting
Polonius. That is mostly a by-product, though.
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This rewires SCC annotations to have them be a separate,
visitor-type data structure. It was broken out of #130227,
which needed them to be able to remove unused annotations
after computation without recomputing the SCCs themselves.
As a drive-by it also removes some redundant code from
the hot loop in SCC construction for a performance improvement.
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The `Edges` iterator returns `OutlivesConstraint` elements, which are 72
bytes. This is big enough to affect performance. Return
`&OutlivesConstraint` would be better. However, each `Edges` iterator is
really one of two different iterators. The "from graph" case does a
graph traversal and could return `&OutlivesConstraint`. But the "from
static" case just does a `0..n` iteration and constructs a new
`OutlivesConstraint` from that, so it can't return a reference.
This commit splits `Edges into `EdgesFromGraph` and `EdgesFromStatic`,
which allows them to have different return types. This is a perf win for
the `wg-grammar` benchmark.
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This facilitates the next commit.
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- Replace non-standard names like 's, 'p, 'rg, 'ck, 'parent, 'this, and
'me with vanilla 'a. These are cases where the original name isn't
really any more informative than 'a.
- Replace names like 'cx, 'mir, and 'body with vanilla 'a when the lifetime
applies to multiple fields and so the original lifetime name isn't
really accurate.
- Put 'tcx last in lifetime lists, and 'a before 'b.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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This version is a squash-rebased version of a series
of exiermental commits, since large parts of them
were broken out into PR #125069.
It explicitly handles universe violations in higher-kinded
outlives constraints by adding extra outlives static constraints.
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In terms of code organisation, this is a lot cleaner and allows
tighter access modifiers.
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This patch has been extracted from #123720. It specifically enhances
`Sccs` to allow tracking arbitrary commutative properties of SCCs, including
- reachable values (max/min)
- SCC-internal values (max/min)
This helps with among other things universe computation: we can now identify
SCC universes as a straightforward "find max/min" operation during SCC construction.
It's also more or less zero-cost; don't use the new features, don't pay for them.
This commit also vastly extends the documentation of the SCCs module, which I had a very hard time following.
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Now with RPITIT instead of GAT!
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Now with GAT!
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That is, change `diagnostic_outside_of_impl` and
`untranslatable_diagnostic` from `allow` to `deny`, because more than
half of the compiler has be converted to use translated diagnostics.
This commit removes more `deny` attributes than it adds `allow`
attributes, which proves that this change is warranted.
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Similar to the previous commit, this replaces `newtype_index`'s opt-out
`no_ord_impl` attribute with the opt-in `orderable` attribute.
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All the same reasons as for `[T]`: more general, less pointer chasing, and `&mut IndexSlice` emphasizes that it doesn't change *length*.
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Improve syntax of `newtype_index`
This makes it more like proper Rust and also makes the implementation a lot simpler.
Mostly just turns weird flags in the body into proper attributes.
It should probably also be converted to an attribute macro instead of function-like, but that can be done in a future PR.
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Remove the `..` from the body, only a few invocations used it and it's
inconsistent with rust syntax.
Use `;` instead of `,` between consts. As the Rust syntax gods inteded.
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This removes the `custom` format functionality as its only user was
trivially migrated to using a normal format.
If a new use case for a custom formatting impl pops up, you can add it
back.
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Revert "lint auto pass"
This reverts commit e58e4466384924c491a932d3f18ef50ffa5a5065.
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Don't use `ConstraintCategory::ClosureBounds`!
Set the category and the span for the promoted constraints to that of
the original constraint earlier than before.
This eliminates the need for `closure_bounds_mapping`.
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This reverts commit a6b5f95fb028f9feb4a2957c06b35035be2c6155.
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This reverts commit aae37f87632dd74856d55c0cd45d2c192379c990.
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Previously, we would retrieve the span from the `Body` using
the `locations` field. However, we may end up changing the
`locations` field when moving a constraint from a promoted
to a different body.
We now store the original `Span` in a dedication field, so that
changes to the `locations` do not affect the quality of our
diagnostics.
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In two cases where this ordering was used, I've replaced the sorting
to use a key that does not include DefId. I'm not sure this is correct
in terms of our goals from #90317, or otherwise.
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