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rust: macros: fix usage of #[allow] in quote!

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When using `quote!` as part of an expression that was not the last one
in a function, the `#[allow(clippy::vec_init_then_push)]` attribute
would be present on an expression, which is not allowed.
This patch refactors that part of the macro to use a statement instead.

Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://lore.kernel.org/r/20230424081112.99890-1-benno.lossin@proton.me
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Benno Lossin 2023-04-24 08:11:33 +00:00 committed by Miguel Ojeda
parent 6883b29c6c
commit b8342addde
1 changed files with 8 additions and 6 deletions
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14
rust/macros/quote.rs
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@ -39,12 +39,14 @@ impl ToTokens for TokenStream {
/// [`quote_spanned!`](https://docs.rs/quote/latest/quote/macro.quote_spanned.html) macro from the
/// `quote` crate but provides only just enough functionality needed by the current `macros` crate.
macro_rules! quote_spanned {
($span:expr => $($tt:tt)*) => {
#[allow(clippy::vec_init_then_push)]
{
let mut tokens = ::std::vec::Vec::new();
let span = $span;
quote_spanned!(@proc tokens span $($tt)*);
($span:expr => $($tt:tt)*) => {{
let mut tokens;
#[allow(clippy::vec_init_then_push)]
{
tokens = ::std::vec::Vec::new();
let span = $span;
quote_spanned!(@proc tokens span $($tt)*);
}
::proc_macro::TokenStream::from_iter(tokens)
}};
(@proc $v:ident $span:ident) => {};