Rollup of 7 pull requests #101092
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Rollup of 7 pull requests #101092
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We have `File::create` for creating a file or opening an existing file, but the secure way to guarantee creating a new file requires a longhand invocation via `OpenOptions`. Add `File::create_new` to handle this case, to make it easier for people to do secure file creation.
I refactored the code: - Removed handling of methods, as it felt entirely unnecessary - Removed clippy utils (obviously...) - Used some shiny compiler features (let-else is very handy for lints 👀) - I also renamed the lint to `for_loop_over_fallibles` (note: no `s`). I'm not sure what's the naming convention here, so maybe I'm wrong.
if the iterator is used after the loop, we need to use `.by_ref()`
The loop could contain `break;` that won't work with an `if let`
Add a `File::create_new` constructor We have `File::create` for creating a file or opening an existing file, but the secure way to guarantee creating a new file requires a longhand invocation via `OpenOptions`. Add `File::create_new` to handle this case, to make it easier for people to do secure file creation.
…alfJung Strengthen invalid_value lint to forbid uninit primitives, adjust docs to say that's UB For context: rust-lang#66151 (comment) This does not make it a FCW, but it does explicitly state in the docs that uninit integers are UB. This also doesn't affect any runtime behavior, uninit u32's will still successfully be created through mem::uninitialized.
Uplift `clippy::for_loops_over_fallibles` lint into rustc
This PR, as the title suggests, uplifts [`clippy::for_loops_over_fallibles`] lint into rustc. This lint warns for code like this:
```rust
for _ in Some(1) {}
for _ in Ok::<_, ()>(1) {}
```
i.e. directly iterating over `Option` and `Result` using `for` loop.
There are a number of suggestions that this PR adds (on top of what clippy suggested):
1. If the argument (? is there a better name for that expression) of a `for` loop is a `.next()` call, then we can suggest removing it (or rather replacing with `.by_ref()` to allow iterator being used later)
```rust
for _ in iter.next() {}
// turns into
for _ in iter.by_ref() {}
```
2. (otherwise) We can suggest using `while let`, this is useful for non-iterator, iterator-like things like [async] channels
```rust
for _ in rx.recv() {}
// turns into
while let Some(_) = rx.recv() {}
```
3. If the argument type is `Result<impl IntoIterator, _>` and the body has a `Result<_, _>` type, we can suggest using `?`
```rust
for _ in f() {}
// turns into
for _ in f()? {}
```
4. To preserve the original behavior and clear intent, we can suggest using `if let`
```rust
for _ in f() {}
// turns into
if let Some(_) = f() {}
```
(P.S. `Some` and `Ok` are interchangeable depending on the type)
I still feel that the lint wording/look is somewhat off, so I'll be happy to hear suggestions (on how to improve suggestions :D)!
Resolves rust-lang#99272
[`clippy::for_loops_over_fallibles`]: https://rust-lang.github.io/rust-clippy/master/index.html#for_loops_over_fallibles
…g, r=JohnTitor Stabilize `std::io::read_to_string` Closes rust-lang#80218. 🎉 **Blocked on FCP finishing**
…tch-err, r=oli-obk Improve const mismatch `FulfillmentError` Fixes rust-lang#100414
…, r=thomcc Use `DisplayBuffer` for socket addresses. Continuation of rust-lang#100625 for socket addresses. Renames `net::addr` to `net::addr::socket`, `net::ip` to `net::addr::ip` and `net::ip::display_buffer::IpDisplayBuffer` to `net::addr::display_buffer::DisplayBuffer`.
…ds, r=spastorino
Do not report too many expr field candidates
When considering "this expressions' field has a {field/method}" suggestions:
1. Don't report methods that are out of scope
2. Use `span_suggestions` instead of reporting each field candidate, which caps the number of suggestions to 4
4. Blacklist some common traits like `Clone` and `Deref`
Fixes rust-lang#100894
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@bors r+ rollup=never p=5 |
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⌛ Testing commit 11905c6 with merge 2bad1a28bafb628d6cd324046f2e798fd366961d... |
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💔 Test failed - checks-actions |
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Successful merges:
File::create_newconstructor #98801 (Add aFile::create_newconstructor)clippy::for_loops_over_fallibleslint into rustc #99696 (Upliftclippy::for_loops_over_fallibleslint into rustc)std::io::read_to_string#100337 (Stabilizestd::io::read_to_string)FulfillmentError#100437 (Improve const mismatchFulfillmentError)DisplayBufferfor socket addresses. #100640 (UseDisplayBufferfor socket addresses.)Failed merges:
r? @ghost
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