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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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39867fec28
Modules can (and usually do) have multiple alias tags, in order to specify multiple possible device matches for autoloading. Allow this by changing the alias ModuleInfo field to an Option<Vec<String>>. Note: For normal device IDs this is autogenerated by modpost (which is not properly integrated with Rust support yet), so it is useful to be able to manually add device match aliases for now, and should still be useful in the future for corner cases that modpost does not handle. This pulls in the expect_group() helper from the rfl/rust branch (with credit to authors). Co-developed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Co-developed-by: Finn Behrens <me@kloenk.dev> Signed-off-by: Finn Behrens <me@kloenk.dev> Co-developed-by: Sumera Priyadarsini <sylphrenadin@gmail.com> Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com> Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Signed-off-by: Asahi Lina <lina@asahilina.net> Link: https://lore.kernel.org/r/20230224-rust-macros-v2-1-7396e8b7018d@asahilina.net Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
71 lines
2.1 KiB
Rust
71 lines
2.1 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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use proc_macro::{token_stream, Group, TokenTree};
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pub(crate) fn try_ident(it: &mut token_stream::IntoIter) -> Option<String> {
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if let Some(TokenTree::Ident(ident)) = it.next() {
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Some(ident.to_string())
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} else {
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None
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}
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}
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pub(crate) fn try_literal(it: &mut token_stream::IntoIter) -> Option<String> {
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if let Some(TokenTree::Literal(literal)) = it.next() {
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Some(literal.to_string())
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} else {
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None
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}
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}
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pub(crate) fn try_string(it: &mut token_stream::IntoIter) -> Option<String> {
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try_literal(it).and_then(|string| {
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if string.starts_with('\"') && string.ends_with('\"') {
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let content = &string[1..string.len() - 1];
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if content.contains('\\') {
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panic!("Escape sequences in string literals not yet handled");
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}
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Some(content.to_string())
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} else if string.starts_with("r\"") {
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panic!("Raw string literals are not yet handled");
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} else {
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None
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}
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})
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}
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pub(crate) fn expect_ident(it: &mut token_stream::IntoIter) -> String {
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try_ident(it).expect("Expected Ident")
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}
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pub(crate) fn expect_punct(it: &mut token_stream::IntoIter) -> char {
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if let TokenTree::Punct(punct) = it.next().expect("Reached end of token stream for Punct") {
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punct.as_char()
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} else {
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panic!("Expected Punct");
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}
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}
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pub(crate) fn expect_string(it: &mut token_stream::IntoIter) -> String {
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try_string(it).expect("Expected string")
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}
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pub(crate) fn expect_string_ascii(it: &mut token_stream::IntoIter) -> String {
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let string = try_string(it).expect("Expected string");
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assert!(string.is_ascii(), "Expected ASCII string");
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string
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}
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pub(crate) fn expect_group(it: &mut token_stream::IntoIter) -> Group {
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if let TokenTree::Group(group) = it.next().expect("Reached end of token stream for Group") {
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group
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} else {
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panic!("Expected Group");
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}
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}
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pub(crate) fn expect_end(it: &mut token_stream::IntoIter) {
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if it.next().is_some() {
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panic!("Expected end");
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}
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}
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