Remove box expressions from HIR
After #108516, `#[rustc_box]` is used at HIR->THIR lowering and this is no longer emitted, so it can be removed.
This is based on top of #108471 to help with conflicts, so 43490488ccacd1a822e9c621f5ed6fca99959a0b is the only relevant commit (sorry for all the duplicated pings!)
````@rustbot```` label +S-blocked
fix `almost_swapped`: Ignore external macros
Fixes#10421 ; Related to #10499 (Fixing points *1* and *3* from #10421)
changelog: [`almost_swapped`]: Add a check to ignore external macros
Fix `almost_swapped` false positive (`let mut a = b; a = a`)
Fixes `2` in #10421
changelog: [`almost_swapped`]: Fix false positive when a variable is changed to itself. (`a = a`)
Fix documentation for `derived_hash_with_manual_eq`
changelog: fix documentation for `derived_hash_with_manual_eq`
The documentation retained "vice versa" from the previous incarnation of the lint but the lint itself no longer lints against manual `Hash` implementations with a derived `PartialEq`.
I also adjusted the documentation for `PartialOrd`-`Ord` lint as "vice versa" seemed a little confusing to me there (as to what it was refering to exactly.)
The documentation retained "vice versa" from the previous incarnation of
the lint but the lint itself no longer lints against manual `Hash`
implementations with a derived `PartialEq`.
I also adjusted the documentation for `PartialOrd`-`Ord` lint as "vice
versa" seemed a little confusing to me there (as to what it was refering
to exactly.)
Remove `identity_future` indirection
This was previously needed because the indirection used to hide some unexplained lifetime errors, which it turned out were related to the `min_choice` algorithm.
Removing the indirection also solves a couple of cycle errors, large moves and makes async blocks support the `#[track_caller]`annotation.
Fixes https://github.com/rust-lang/rust/issues/104826.
enhance [`ifs_same_cond`] to warn same immutable method calls as well
fixes: #10272
---
changelog: Enhancement: [`ifs_same_cond`]: Now also detects immutable method calls.
[#10350](https://github.com/rust-lang/rust-clippy/pull/10350)
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Fix semicolon insertion in `match_single_binding`
changelog: [`match_single_binding`]: Fix missing semicolon after the suggestion
Fixes#10447
Also fixes an edge case for unit returning macros in expression contexts:
```rust
f(match 1 {
_ => println!("foo"),
});
```
would suggest
```rust
f(println!("foo"););
```
Remove `box_syntax`
r? `@Nilstrieb`
This removes the feature `box_syntax`, which allows the use of `box <expr>` to create a Box, and finalises removing use of the feature from the compiler. `box_patterns` (allowing the use of `box <pat>` in a pattern) is unaffected.
It also removes `ast::ExprKind::Box` - the only way to create a 'box' expression now is with the rustc-internal `#[rustc_box]` attribute.
As a temporary measure to help users move away, `box <expr>` now parses the inner expression, and emits a `MachineApplicable` lint to replace it with `Box::new`
Closes#49733
Strengthen state tracking in const-prop
Some/many of the changes are replicated between both the const-prop lint and the const-prop optimization.
Behaviour changes:
- const-prop opt does not give a span to propagated values. This was useless as that span's primary purpose is to diagnose evaluation failure in codegen.
- we remove the `OnlyPropagateInto` mode. It was only used for function arguments, which are better modeled by a write before entry.
- the tracking of assignments and discriminants make clearer that we do nothing in `NoPropagation` mode or on indirect places.
Add utility macros to help with writing tests.
Adds two utility macros to help with testing:
* `external` expands to it's argument tokens, but makes them appear to come from an external macro. Helps make tests for `in_external_macro` much more readable.
* `inline_macros` is an attribute macro which allows the use of a pseudo `inline!` macro which expands to it's argument tokens, but makes them appear to be from a crate-local macro expansion. This removes the need to write `macro_rules` boilerplate when testing how lints interact with macros.
---
`external`'s usage is simple. `external!(struct Foo { x: u32});` will make the struct appear as though it came from an external macro. Individual tokens can be escaped if needed. `external!($x + 0 / 10)` will make everything except `x` appear as though it came from an external macro. Can also use `$literal` and `$(tokens...)` as well.
---
`inline_macros` is more complicated due to compiler constraints. Given:
```rust
#[inline_macros]
fn foo() {
inline!(5 + 5 / 10);
}
```
`inline!(5 + 5 / 10)` will be replace with a call to a generated macro which expands to the contained tokens.
Tokens can be escaped by prefixing them with `$`:
```rust
#[inline_macros]
fn foo() {
let x = 5;
inline!($x + 5 / $10);
}
```
This will pass `x` as an `ident` argument and `10` as a `literal` argument.
Token sequences can also be passed with `$(...)`:
```rust
#[inline_macros]
fn foo() {
let mut x = 5;
inline!(if $(x >= 5) {
$x = 5;
});
}
```
This will pass `x >= 5` as `tt` arguments, and `x` as an `ident` argument.
---
Not 100% sure `inline_macros` is actually worth having. It does make the tests a little easier to read once you're used to it and it becomes more useful once there are multiple macro tests. The verbosity of declaring single use macros starts to hurt at that point.
changelog: None
Improve diagnostic of `no_mangle_with_rust_abi`
fixes#10409
Pending rust-lang/rustfmt#5701
This rewords the message to focus on the error being an implicit ABI, rather than the `Rust` ABI. Also downgrades the suggestion to `MaybeIncorrect` and changes the suggestion span to better highlight the change.
---
changelog: None
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Directly construct Inherited in typeck.
Using `InheritedBuilder` + a closure does not seem necessary any more.
+ a few opportunistic simplifications to typeck entry point.
Add more license annotations
This PR updates the `.reuse/dep5` file to include more accurate licensing data for everything in the repository (*excluding* submodules and dependencies). Some decisions were made in this PR:
* The standard copyright attribution for files maintained by us is "The Rust Project Developers (see https://thanks.rust-lang.org)", to avoid having to maintain an in-tree `AUTHORS` file.
* For files that have specific licensing terms, we added the terms to the `.reuse/dep5` rather than adding SPDX comments in the files themselves.
* REUSE picks up any comment/text line with `Copyright` on it, so I had to sprinkle around `REUSE-IgnoreStart` and `REUSE-IgnoreEnd` comments.
The rendered `COPYRIGHT` file is available at https://gist.github.com/pietroalbini/efb81103f69596d39758114f3f6a8688.
r? `@pnkfelix`
Don't lint `manual_clamp` in const contexts.
fixes#10474
Probably worth including in the sync.
r? `@flip1995`
changelog: [`manual_clamp`]: Don't lint in const contexts.
Migrate `write.rs` to `rustc_ast::FormatArgs`
changelog: none
Part 1 of #10233
The additions to `clippy_utils` are the main novelty of this PR, there's no removals yet since other parts still rely on `FormatArgsExpn`
The changes to `write.rs` itself are relatively straightforward this time around, as there's no lints in it that rely on type checking format params
r? `@flip1995`
