Benno Lossin 9218cf826f rust: init: change the generated name of guard variables ... The initializers created by the `[try_][pin_]init!` macros utilize the guard pattern to drop already initialized fields, when initialization fails mid-way. These guards are generated to have the same name as the field that they handle. To prevent namespacing issues [1] when the field name is the same as e.g. a constant name, add `__` as a prefix and `_guard` as the suffix. [ Gary says: "Here's the simplified example: ``` macro_rules! f { () => { let a = 1; let _: u32 = a; } } const a: u64 = 1; fn main() { f!(); } ``` The `a` in `f` have a different hygiene so normally it is scoped to the macro expansion and wouldn't escape. Interestingly a constant is still preferred despite the hygiene so constants escaped into the macro, leading to the error." - Miguel ] Signed-off-by: Benno Lossin <benno.lossin@proton.me> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/rust-for-linux/1e8a2a1f-abbf-44ba-8344-705a9cbb1627@proton.me/ [1] Link: https://lore.kernel.org/r/20240403194321.88716-1-benno.lossin@proton.me [ Added Benno's link and Gary's simplified example. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>		2024-05-05 18:05:00 +02:00
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__internal.rs	rust: init: add `{pin_}chain` functions to `{Pin}Init<T, E>`	2023-08-21 14:31:49 +02:00
macros.rs	rust: init: change the generated name of guard variables	2024-05-05 18:05:00 +02:00