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Avoid confusion with binary integer literals and binary operator expressions in libsyntax
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this should reduce the size of ty::Region to 24 bytes (from 32),
and they are treated differently in most cases anyway.
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Fixes #27876.
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(this incidentally fixes an error message where the paths separator is " " instead of "::")
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An implementation of [RFC 1219](https://github.com/rust-lang/rfcs/pull/1219).
The RFC is not merged yet, but once merged, this could be.
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This ended up being a bigger refactoring than I thought, as I also cleaned a few ugly points in rustc. There are still a few areas that need improvements.
Performance numbers:
```
Before:
572.70user 5.52system 7:33.21elapsed 127%CPU (0avgtext+0avgdata 1173368maxresident)k
llvm-time: 385.858
After:
545.27user 5.49system 7:10.22elapsed 128%CPU (0avgtext+0avgdata 1145348maxresident)k
llvm-time: 387.119
```
A good 5% perf improvement. Note that after this patch >70% of the time is spent in LLVM - Amdahl's law is in full effect.
Passes make check locally.
r? @nikomatsakis
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Reapplied the changes from https://github.com/freebroccolo/rust/commit/dc64b731d7f66c2b43d5e5e8c721be7bd3b59540
to a clean branch of master
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This basically only affects modules which are empty (or only contain comments).
Closes #26755
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Fixes #26900
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Arrays and slices are closely related, but not that closely; making the
separation more explicit is generally more clear.
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Use camel-case naming, and use names which actually make sense in modern Rust.
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With the latter is provided by the `From` conversion trait, the former is now completely redundant. Their code is identical. Let’s deprecate now and plan to remove in the next cycle. (It’s `#[unstable]`.)
r? @alexcrichton
CC @nagisa
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r? @eddyb
Fixes #19476.
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rustdoc: Associated type fixes
The first commit fixes a bug with "dud" items in the search index from
misrepresented `type` items in trait impl blocks.
For a trait *implementation* there are typedefs which are the types for
that particular trait and implementor. Skip these in the search index.
There were lots of dud items in the search index due to this (search for
Item, Iterator's associated type).
Add a boolean to clean::TypedefItem so that it tracks whether the it is
a type alias on its own, or if it's a `type` item in a trait impl.
The second commit fixes a bug that made signatures and where bounds
using associated types (if they were not on `Self`) incorrect.
The third commit fixes so that where clauses in type alias definititons
are shown.
Fixes #22442
Fixes #24417
Fixes #25769
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by 90%.
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Functions such as `fn foo<I: Iterator>(x: I::Item)` would not
render correctly and displayed `I` instead of `I::Item`. Same thing
with `I::Item` appearing in where bounds.
This fixes the bug by using paths for generics.
Fixes #24417
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- add feature gate
- add basic tests
- adjust parser to eliminate conflict between `const fn` and associated
constants
- allow `const fn` in traits/trait-impls, but forbid later in type check
- correct some merge conflicts
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For a trait *implementation* there are typedefs which are the types for
that particular trait and implementor. Skip these in the search index.
There were lots of dud items in the search index due to this (search for
Item, Iterator's associated type).
Add a boolean to clean::TypedefItem so that it tracks whether the it is
a type alias on its own, or if it's a `type` item in a trait impl.
Fixes #22442
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The loop to load all the known impls from external crates seems to have been used because `ty::populate_implementations_for_trait_if_necessary` wasn't doing its job, and solely relying on it resulted in loading only impls in the same crate as the trait.
Coherence for `librustc` was reduced from 18.310s to 0.610s, from stage1 to stage2.
Interestingly, type checking also went from 46.232s to 42.003s, though that could be noise or unrelated improvements.
On a smaller scale, `fn main() {}` now spends 0.003s in coherence instead of 0.368s, which fixes #22068.
It also peaks at only 1.2MB, instead of 16MB of heap usage.
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clear that it only populates inherent impls.
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There were still some mentions of `~[T]` and `~T`, mostly in comments and debugging statements. I tried to do my best to preserve meaning, but I might have gotten some wrong-- I'm happy to fix anything :)
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constants is not yet working.
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Introduces new variants and types in syntax::ast, middle::ty, and middle::def.
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