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2026-01-17rust: pin-init: rewrite `derive(Zeroable)` and `derive(MaybeZeroable)` using ↵Benno Lossin-2/+0
`syn` Rewrite the two derive macros for `Zeroable` using `syn`. One positive side effect of this change is that tuple structs are now supported by them. Additionally, syntax errors and the error emitted when trying to use one of the derive macros on an `enum` are improved. Otherwise no functional changes intended. For example: #[derive(Zeroable)] enum Num { A(u32), B(i32), } Produced this error before this commit: error: no rules expected keyword `enum` --> tests/ui/compile-fail/zeroable/enum.rs:5:1 | 5 | enum Num { | ^^^^ no rules expected this token in macro call | note: while trying to match keyword `struct` --> src/macros.rs | | $vis:vis struct $name:ident | ^^^^^^ Now the error is: error: cannot derive `Zeroable` for an enum --> tests/ui/compile-fail/zeroable/enum.rs:5:1 | 5 | enum Num { | ^^^^ error: cannot derive `Zeroable` for an enum Tested-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Gary Guo <gary@garyguo.net> Signed-off-by: Benno Lossin <lossin@kernel.org>
2026-01-17rust: pin-init: internal: add utility API for syn error handlingBenno Lossin-0/+32
The API is similar to diagnostics handling in rustc and uses a `ErrorGuaranteed` value to signify that an error has been emitted. It supports both fatal errors (which abort the macro expansion immediately by returning `Err(ErrorGuaranteed)`) and non-fatal ones at generation time. These errors are appended to the token stream after generation has finished normally. This allows giving good errors while still expanding most of the code as expected to avoid the user encountering additional errors (for example missing definitions). Suggested-by: Gary Guo <gary@garyguo.net> Tested-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Gary Guo <gary@garyguo.net> [ remove duplicate word in commit message - Benno ] Signed-off-by: Benno Lossin <lossin@kernel.org>