Rustup #11929
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Rustup #11929
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Stabilize C string literals RFC: https://rust-lang.github.io/rfcs/3348-c-str-literal.html Tracking issue: rust-lang/rust#105723 Documentation PR (reference manual): rust-lang/reference#1423 # Stabilization report Stabilizes C string and raw C string literals (`c"..."` and `cr#"..."#`), which are expressions of type [`&CStr`](https://doc.rust-lang.org/stable/core/ffi/struct.CStr.html). Both new literals require Rust edition 2021 or later. ```rust const HELLO: &core::ffi::CStr = c"Hello, world!"; ``` C strings may contain any byte other than `NUL` (`b'\x00'`), and their in-memory representation is guaranteed to end with `NUL`. ## Implementation Originally implemented by PR rust-lang/rust#108801, which was reverted due to unintentional changes to lexer behavior in Rust editions < 2021. The current implementation landed in PR rust-lang/rust#113476, which restricts C string literals to Rust edition >= 2021. ## Resolutions to open questions from the RFC * Adding C character literals (`c'.'`) of type `c_char` is not part of this feature. * Support for `c"..."` literals does not prevent `c'.'` literals from being added in the future. * C string literals should not be blocked on making `&CStr` a thin pointer. * It's possible to declare constant expressions of type `&'static CStr` in stable Rust (as of v1.59), so C string literals are not adding additional coupling on the internal representation of `CStr`. * The unstable `concat_bytes!` macro should not accept `c"..."` literals. * C strings have two equally valid `&[u8]` representations (with or without terminal `NUL`), so allowing them to be used in `concat_bytes!` would be ambiguous. * Adding a type to represent C strings containing valid UTF-8 is not part of this feature. * Support for a hypothetical `&Utf8CStr` may be explored in the future, should such a type be added to Rust.
Because the variant name in `Level` is `Note`, and the `without_error` suffix is omitted in similar cases like `struct_allow` and `struct_help`.
…bug`. Because the corresponding `Level` is `DelayedBug` and `span_delayed_bug` follows the pattern used everywhere else: `span_err`, `span_warning`, etc.
…r-errors Cleanup error handlers Mostly by making function naming more consistent. More to do after this, but this is enough for one PR. r? compiler-errors
Clippy subtree sync r? `@Manishearth`
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@bors try |
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@bors delegate=@matthiaskrgr |
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✌️ @matthiaskrgr, you can now approve this pull request! If @flip1995 told you to " |
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Rustup r? `@xFrednet` changelog: none out of cycle sync to fix integration test failure for the XFAIL integration test, as the `delayed_span_bug` attribute name was updated.
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@matthiaskrgr Feel free to merge after you re-updated the |
If that test fails, running all other tests doesn't make sense. This test only takes a few seconds to run. So running it right away will make the pipeline fail faster.
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@bors try |
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Dec 5, 2023
Rustup r? `@xFrednet` changelog: none out of cycle sync to fix integration test failure for the XFAIL integration test, as the `delayed_span_bug` attribute name was updated.
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@bors r+ |
This was referenced Dec 5, 2023
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☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test |
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r? @xFrednet
changelog: none
out of cycle sync to fix integration test failure for the XFAIL integration test, as the
delayed_span_bugattribute name was updated.