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macros 2.0.
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rustc::hir::def_id so that we get an ICE instead of silently doing the wrong thing.
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things into a macro.
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wrong results).
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Make last structs indexes definitions use newtype_index macro
This PR makes the last two index structs not using newtype_index macro to use it and also fixes this https://github.com/rust-lang/rust/issues/45763 issue.
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Display spans correctly when there are zero-width or wide characters
Hopefully...
* fixes #45211
* fixes #8706
---
Before:
```
error: invalid width `7` for integer literal
--> unicode_2.rs:12:25
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12 | let _ = ("a̐éö̲", 0u7);
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= help: valid widths are 8, 16, 32, 64 and 128
error: invalid width `42` for integer literal
--> unicode_2.rs:13:20
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13 | let _ = ("아あ", 1i42);
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= help: valid widths are 8, 16, 32, 64 and 128
error: aborting due to 2 previous errors
```
After:
```
error: invalid width `7` for integer literal
--> unicode_2.rs:12:25
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12 | let _ = ("a̐éö̲", 0u7);
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= help: valid widths are 8, 16, 32, 64 and 128
error: invalid width `42` for integer literal
--> unicode_2.rs:13:20
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13 | let _ = ("아あ", 1i42);
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= help: valid widths are 8, 16, 32, 64 and 128
error: aborting due to 2 previous errors
```
Spans might display incorrectly on the browser.
r? @estebank
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DefaultImpl is a highly confusing name for what we now call auto impls,
as in `impl Send for ..`. The name auto impl is not formally decided
but for sanity anything is better than `DefaultImpl` which refers
neither to `default impl` nor to `impl Default`.
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incr.comp.: Implement compiler diagnostic persistence.
This PR implements storing and loading diagnostics that the compiler generates and thus allows for emitting warnings during incremental compilation without actually re-evaluating the thing the warning originally came from. It also lays some groundwork for storing and loading type information and MIR in the incr. comp. cache.
~~It is still work in progress:~~
- ~~There's still some documentation to be added.~~
- ~~The way anonymous queries are handled might lead to duplicated emissions of warnings. Not sure if there is a better way or how frequent such duplication would be in practice.~~
Diagnostic message duplication is addressed separately in #45519.
r? @nikomatsakis
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have to be hashed in downstream crates.
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- Don't hash traits in scope as part of HIR hashing any more.
- Some queries returned DefIndexes from other crates.
- Provide a generic way of stably hashing maps (not used everywhere yet).
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This is a big map that ends up inside of a `CrateContext` during translation for
all codegen units. This means that any change to the map may end up causing an
incremental recompilation of a codegen unit! In order to reduce the amount of
dependencies here between codegen units and the actual input crate this commit
refactors dealing with exported symbols and such into various queries.
The new queries are largely based on existing queries with filled out
implementations for the local crate in addition to external crates, but the main
idea is that while translating codegen untis no unit needs the entire set of
exported symbols, instead they only need queries about particulare `DefId`
instances every now and then.
The linking stage, however, still generates a full list of all exported symbols
from all crates, but that's going to always happen unconditionally anyway, so no
news there!
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This should now be entirely tracked through queries, so no need to have a
`DepGraph` in the `CStore` object any more!
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Previously a `Symbol` was stored there, but this ended up causing hash
collisions in situations that otherwise shouldn't have a hash collision. Only
the symbol's string value was hashed, but it was possible for distinct symbols
to have the same string value, fooling various calcuations into thinking that
these paths *didn't* need disambiguating data when in fact they did!
By storing `InternedString` instead we're hopefully triggering all the exising
logic to disambiguate paths with same-name `Symbol` but actually distinct
locations.
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Should hopefully more accurately reflect what's happening! This commit also
removes the cache in the cstore implementation as it's already cached through
the query infrastructure.
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Implements RFC 1845, adding implementations of:
* `From<&[T]>` for `Rc<[T]>`
* `From<&str>` for `Rc<str>`
* `From<String>` for `Rc<str>`
* `From<Box<T: ?Sized>>` for `Rc<T>`
* `From<Vec<T>>` for `Rc<[T]>`
* and likewise for `Arc<_>`
Also removes now-obsolete internal methods `Rc::__from_array` and
`Rc::__from_str`, replacing their use with `Rc::from`.
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Like #43008 (f668999), but _much more aggressive_.
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Implement lazy loading of external crates' sources. Fixes #38875
Fixes #38875. This is a follow-up to #42507. When a (now correctly translated) span from an external crate is referenced in a error, warning or info message, we still don't have the source code being referenced.
Since stuffing the source in the serialized metadata of an rlib is extremely wasteful, the following scheme has been implemented:
* File maps now contain a source hash that gets serialized as well.
* When a span is rendered in a message, the source hash in the corresponding file map(s) is used to try and load the source from the corresponding file on disk. If the file is not found or the hashes don't match, the failed attempt is recorded (and not retried).
* The machinery fetching source lines from file maps is augmented to use the lazily loaded external source as a secondary fallback for file maps belonging to external crates.
This required a small change to the expected stderr of one UI test (it now renders a span, where previously was none).
Further work can be done based on this - some of the machinery previously used to hide external spans is possibly obsolete and the hashing code can be reused in different places as well.
r? @eddyb
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A bug has been discovered and fixed in the process.
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incr.comp.: Make DepNode `Copy` and valid across compilation sessions
This PR moves `DepNode` to a representation that does not need retracing and thus simplifies comparing dep-graphs from different compilation sessions. The code also gets a lot simpler in many places, since we don't need the generic parameter on `DepNode` anymore. See https://github.com/rust-lang/rust/issues/42294 for details.
~~NOTE: Only the last commit of this is new, the rest is already reviewed in https://github.com/rust-lang/rust/pull/42504.~~
This PR is almost done but there are some things I still want to do:
- [x] Add some module-level documentation to `dep_node.rs`, explaining especially what the `define_dep_nodes!()` macro is about.
- [x] Do another pass over the dep-graph loading logic. I suspect that we can get rid of building the `edges` map and also use arrays instead of hash maps in some places.
cc @rust-lang/compiler
r? @nikomatsakis
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We can use these to perform lazy loading of source files belonging to
external crates. That way we will be able to show the source code of
external spans that have been translated.
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Fix translation of external spans
Previously, I noticed that spans from external crates don't generate any output. This limitation is problematic if analysis is performed on one or more external crates, as is the case with [rust-semverver](https://github.com/ibabushkin/rust-semverver). This change should address this behaviour, with the potential drawback that a minor performance hit is to be expected, as spans from potentially large crates have to be translated now.
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This allows for treating global crate metadata the same as regular metadata with regard to incr. comp.
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Remove interior mutability from TraitDef by turning fields into queries
This PR gets rid of anything `std::cell` in `TraitDef` by
- moving the global list of trait impls from `TraitDef` into a query,
- moving the list of trait impls relevent for some self-type from `TraitDef` into a query
- moving the specialization graph of trait impls into a query, and
- moving `TraitDef::object_safety` into a query.
I really like how querifying things not only helps with incremental compilation and on-demand, but also just plain makes the code cleaner `:)`
There are also some smaller fixes in the PR. Commits can be reviewed separately.
r? @eddyb or @nikomatsakis
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