Added doc comments for fmt::Result
Added doc comments for fmt::Result in regards to item 3 in issue #29355. I'm not certain that this is all that's needed but I think it's a good starting point on this item.
Apply clippy's doc_markdown improvements to libcollections
Since my last PR led to linker failure, I'm now taking much smaller steps.
This only fixes some doc_markdown warnings; as they are in comments only,
we shouldn't get any problems building.
Since my last PR led to linker failure, I'm now taking much smaller steps.
This only fixes some doc_markdown warnings; as they are in comments only,
we shouldn't get any problems building.
Update ChildStderr docs to be clearer
Before the docs only had a line about where it was found and that it was
a handle to stderr. This commit changes it so that the summary second line is
removed and that it's a bit clearer about what can be done with it. Part of
#29370
Use ty::layout for ABI computation instead of LLVM types.
This is the first step in creating a backend-agnostic library for computing call ABI details from signatures.
I wanted to open the PR *before* attempting to move `cabi_*` from trans to avoid rebase churn in #39999.
**EDIT**: As I suspected, #39999 needs this PR to fully work (see https://github.com/rust-lang/rust/pull/39999#issuecomment-287723379).
The first 3 commits add more APIs to `ty::layout` and replace non-ABI uses of `sizing_type_of`.
These APIs are probably usable by other backends, and miri too (cc @stoklund @solson).
The last commit rewrites `rustc_trans::cabi_*` to use `ty::layout` and new `rustc_trans::abi` APIs.
Also, during the process, a couple trivial bugs were identified and fixed:
* `msp430`, `nvptx`, `nvptx64`: type sizes *in bytes* were compared with `32` and `64`
* `x86` (`fastcall`): `f64` was incorrectly not treated the same way as `f32`
Although not urgent, this PR also uses the more general "homogenous aggregate" logic to fix#32045.
Implement .rfind() for slice iterators Iter and IterMut
Just like the forward case find, implement rfind explicitly for slice iterators Iter and IterMut.
Add safe wrapper for atomic_compilerfence intrinsics
This PR adds a proposed safe wrapper for the `atomic_singlethreadfence_*` intrinsics introduced by [RFC #888](https://github.com/rust-lang/rfcs/pull/888). See #41091 for further discussion.
borrowck::mir::dataflow: ignore unwind edges of empty drops
This avoids creating drop flags in many unnecessary situations.
Fixes#41110.
r? @nagisa
beta-nominating because regression. However, that is merely a small perf regression and codegen changes are always risky, so we might let this slide for 1.17.
Fixed ICEs with pattern matching in const expression
Fixed 2 ICEs with when pattern matching inside a constant expression.
Both of these ICEs now resolve to an appropriate compiler error.
1. ICE was caused by a compiler bug to implement discriminant const qualify.
I removed this intentionally thrown bug and changed it to a FIXME as the unimplemented expression type is handled as a compiler error elsewhere.
2. ICE was caused during a drop check when checking if a variable lifetime outlives the current scope if there was no parent scope .
I've changed it to stop checking if there is no parent scope for the current scope. It is valid syntax for a const variable to be assigned a match expression with no enclosing scope.
The ICE seemed to mainly be used as a defensive check for bugs elsewhere.
Fixes#38199.
Fixes#31577.
Fixes#29093.
Fixes#40012.
Introduce `TyErr` independent from `TyInfer`
Add a `TyErr` type to represent unknown types in places where
parse errors have happened, while still able to build the AST.
Initially only used to represent incorrectly written fn arguments and
avoid "expected X parameters, found Y" errors when called with the
appropriate amount of parameters. We cannot use `TyInfer` for this as
`_` is not allowed as a valid argument type.
Example output:
```rust
error: expected one of `:` or `@`, found `,`
--> file.rs:12:9
|
12 | fn bar(x, y: usize) {}
| ^
error[E0061]: this function takes 2 parameters but 3 parameters were supplied
--> file.rs:19:9
|
12 | fn bar(x, y) {}
| --------------- defined here
...
19 | bar(1, 2, 3);
| ^^^^^^^ expected 2 parameters
```
Fix#34264.
Suggest using enum when a variant is used as a type
Given a file:
```rust
enum Fruit {
Apple(i64),
Orange(i64),
}
fn should_return_fruit() -> Apple {
Apple(5)
}
```
Provide the following output:
```rust
error[E0412]: cannot find type `Apple` in this scope
--> file.rs:16:29
|
16 | fn should_return_fruit() -> Apple {
| ^^^^^ not found in this scope
|
help: there is an enum variant `Fruit::Apple`, did you mean to use `Fruit`?
--> file.rs:12:5
|
12 | Apple(i64),
| ^^^^^^^^^^
error[E0425]: cannot find function `Apple` in this scope
--> file.rs:17:5
|
17 | Apple(5)
| ^^^^^ not found in this scope
|
= help: possible candidate is found in another module, you can import it into scope:
`use Fruit::Apple;`
```
Fix#35675.
rustdoc: collapse docblock before showing label
The animation for collapsing descriptions is currently pretty jarring, as the label starts fading in as the description is collapsing. This causes the description to jump down a line (and sometimes change indentation) while animating.
This PR modifies this behavior to collapse the block entirely before starting to fade in the collapse button label.
While this PR works well for descriptions of structs, traits, etc., it still does not look ideal for attributes. I'd appreciate any suggestions for improving that animation. Perhaps we want to optimize for the single-attribute case, and try not to collapse the attribute list entirely before fading in the label?
