From 808c999fc9e7c366fd47da564e69d579c1dc8279 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Mon, 24 Nov 2025 16:18:27 +0100 Subject: rust: syn: import crate This is a subset of the Rust `syn` crate, version 2.0.106 (released 2025-08-16), licensed under "Apache-2.0 OR MIT", from: https://github.com/dtolnay/syn/raw/2.0.106/src The files are copied as-is, with no modifications whatsoever (not even adding the SPDX identifiers). For copyright details, please see: https://github.com/dtolnay/syn/blob/2.0.106/README.md#license https://github.com/dtolnay/syn/blob/2.0.106/LICENSE-APACHE https://github.com/dtolnay/syn/blob/2.0.106/LICENSE-MIT The next two patches modify these files as needed for use within the kernel. This patch split allows reviewers to double-check the import and to clearly see the differences introduced. The following script may be used to verify the contents: for path in $(cd rust/syn/ && find . -type f -name '*.rs'); do curl --silent --show-error --location \ https://github.com/dtolnay/syn/raw/2.0.106/src/$path \ | diff --unified rust/syn/$path - && echo $path: OK done Reviewed-by: Gary Guo Tested-by: Gary Guo Tested-by: Jesung Yang Link: https://patch.msgid.link/20251124151837.2184382-16-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- rust/syn/print.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 rust/syn/print.rs (limited to 'rust/syn/print.rs') diff --git a/rust/syn/print.rs b/rust/syn/print.rs new file mode 100644 index 000000000000..07409932677b --- /dev/null +++ b/rust/syn/print.rs @@ -0,0 +1,16 @@ +use proc_macro2::TokenStream; +use quote::ToTokens; + +pub(crate) struct TokensOrDefault<'a, T: 'a>(pub &'a Option); + +impl<'a, T> ToTokens for TokensOrDefault<'a, T> +where + T: ToTokens + Default, +{ + fn to_tokens(&self, tokens: &mut TokenStream) { + match self.0 { + Some(t) => t.to_tokens(tokens), + None => T::default().to_tokens(tokens), + } + } +} -- cgit