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Sun, 03 Aug 2025 07:21:30 -0700 (PDT) From: Jesung Yang To: Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Alexandre Courbot Cc: linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, nouveau@lists.freedesktop.org, Jesung Yang Subject: [PATCH 1/4] rust: macros: extend custom `quote!()` macro Date: Sun, 3 Aug 2025 14:20:51 +0000 Message-Id: X-Mailer: git-send-email 2.39.5 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement the `ToTokens` trait for `&T` where `T` implements `ToTokens`. This allows users to use the `quote!()` macro with references directly, avoiding the need to clone values. Extend the `quote_spanned!()` macro to support additional punctuation tokens: `->`, `<`, `>`, and `==`. This symbols are commonly needed when dealing with functions, generic bounds, and equality comparisons. Signed-off-by: Jesung Yang --- rust/macros/quote.rs | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/rust/macros/quote.rs b/rust/macros/quote.rs index 92cacc4067c9..24764b04a07d 100644 --- a/rust/macros/quote.rs +++ b/rust/macros/quote.rs @@ -7,6 +7,12 @@ pub(crate) trait ToTokens { fn to_tokens(&self, tokens: &mut TokenStream); } +impl ToTokens for &T { + fn to_tokens(&self, tokens: &mut TokenStream) { + (*self).to_tokens(tokens); + } +} + impl ToTokens for Option { fn to_tokens(&self, tokens: &mut TokenStream) { if let Some(v) = self { @@ -144,6 +150,36 @@ macro_rules! quote_spanned { )); quote_spanned!(@proc $v $span $($tt)*); }; + (@proc $v:ident $span:ident -> $($tt:tt)*) => { + $v.push(::proc_macro::TokenTree::Punct( + ::proc_macro::Punct::new('-', ::proc_macro::Spacing::Joint) + )); + $v.push(::proc_macro::TokenTree::Punct( + ::proc_macro::Punct::new('>', ::proc_macro::Spacing::Alone) + )); + quote_spanned!(@proc $v $span $($tt)*); + }; + (@proc $v:ident $span:ident < $($tt:tt)*) => { + $v.push(::proc_macro::TokenTree::Punct( + ::proc_macro::Punct::new('<', ::proc_macro::Spacing::Alone) + )); + quote_spanned!(@proc $v $span $($tt)*); + }; + (@proc $v:ident $span:ident > $($tt:tt)*) => { + $v.push(::proc_macro::TokenTree::Punct( + ::proc_macro::Punct::new('>', ::proc_macro::Spacing::Alone) + )); + quote_spanned!(@proc $v $span $($tt)*); + }; + (@proc $v:ident $span:ident == $($tt:tt)*) => { + $v.push(::proc_macro::TokenTree::Punct( + ::proc_macro::Punct::new('=', ::proc_macro::Spacing::Joint) + )); + $v.push(::proc_macro::TokenTree::Punct( + ::proc_macro::Punct::new('=', ::proc_macro::Spacing::Alone) + )); + quote_spanned!(@proc $v $span $($tt)*); + }; (@proc $v:ident $span:ident = $($tt:tt)*) => { $v.push(::proc_macro::TokenTree::Punct( ::proc_macro::Punct::new('=', ::proc_macro::Spacing::Alone) -- 2.39.5