diff options
author | Gary Guo <gary@garyguo.net> | 2022-11-10 19:41:19 +0300 |
---|---|---|
committer | Miguel Ojeda <ojeda@kernel.org> | 2022-12-04 03:59:15 +0300 |
commit | b13c9880f909ca5e406d9b3d061359fd8fb0c514 (patch) | |
tree | 9b59eb45b79a659a8ddc42e84ccbcd1c40e98c9b /rust | |
parent | b44becc5ee808e02bbda0f90ee0584f206693a33 (diff) | |
download | linux-b13c9880f909ca5e406d9b3d061359fd8fb0c514.tar.xz |
rust: macros: take string literals in `module!`
Instead of taking binary string literals, take string ones instead,
making it easier for users to define a module, i.e. instead of
calling `module!` like:
module! {
...
name: b"rust_minimal",
...
}
now it is called as:
module! {
...
name: "rust_minimal",
...
}
Module names, aliases and license strings are restricted to
ASCII only. However, the author and the description allows UTF-8.
For simplicity (avoid parsing), escape sequences and raw string
literals are not yet handled.
Link: https://github.com/Rust-for-Linux/linux/issues/252
Link: https://lore.kernel.org/lkml/YukvvPOOu8uZl7+n@yadro.com/
Signed-off-by: Gary Guo <gary@garyguo.net>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'rust')
-rw-r--r-- | rust/macros/helpers.rs | 24 | ||||
-rw-r--r-- | rust/macros/lib.rs | 12 | ||||
-rw-r--r-- | rust/macros/module.rs | 10 |
3 files changed, 29 insertions, 17 deletions
diff --git a/rust/macros/helpers.rs b/rust/macros/helpers.rs index cdc7dc6135d2..cf7ad950dc1e 100644 --- a/rust/macros/helpers.rs +++ b/rust/macros/helpers.rs @@ -18,10 +18,16 @@ pub(crate) fn try_literal(it: &mut token_stream::IntoIter) -> Option<String> { } } -pub(crate) fn try_byte_string(it: &mut token_stream::IntoIter) -> Option<String> { - try_literal(it).and_then(|byte_string| { - if byte_string.starts_with("b\"") && byte_string.ends_with('\"') { - Some(byte_string[2..byte_string.len() - 1].to_string()) +pub(crate) fn try_string(it: &mut token_stream::IntoIter) -> Option<String> { + try_literal(it).and_then(|string| { + if string.starts_with('\"') && string.ends_with('\"') { + let content = &string[1..string.len() - 1]; + if content.contains('\\') { + panic!("Escape sequences in string literals not yet handled"); + } + Some(content.to_string()) + } else if string.starts_with("r\"") { + panic!("Raw string literals are not yet handled"); } else { None } @@ -40,8 +46,14 @@ pub(crate) fn expect_punct(it: &mut token_stream::IntoIter) -> char { } } -pub(crate) fn expect_byte_string(it: &mut token_stream::IntoIter) -> String { - try_byte_string(it).expect("Expected byte string") +pub(crate) fn expect_string(it: &mut token_stream::IntoIter) -> String { + try_string(it).expect("Expected string") +} + +pub(crate) fn expect_string_ascii(it: &mut token_stream::IntoIter) -> String { + let string = try_string(it).expect("Expected string"); + assert!(string.is_ascii(), "Expected ASCII string"); + string } pub(crate) fn expect_end(it: &mut token_stream::IntoIter) { diff --git a/rust/macros/lib.rs b/rust/macros/lib.rs index e40caaf0a656..c1d385e345b9 100644 --- a/rust/macros/lib.rs +++ b/rust/macros/lib.rs @@ -25,20 +25,20 @@ use proc_macro::TokenStream; /// /// module!{ /// type: MyModule, -/// name: b"my_kernel_module", -/// author: b"Rust for Linux Contributors", -/// description: b"My very own kernel module!", -/// license: b"GPL", +/// name: "my_kernel_module", +/// author: "Rust for Linux Contributors", +/// description: "My very own kernel module!", +/// license: "GPL", /// params: { /// my_i32: i32 { /// default: 42, /// permissions: 0o000, -/// description: b"Example of i32", +/// description: "Example of i32", /// }, /// writeable_i32: i32 { /// default: 42, /// permissions: 0o644, -/// description: b"Example of i32", +/// description: "Example of i32", /// }, /// }, /// } diff --git a/rust/macros/module.rs b/rust/macros/module.rs index 186a5b8be23c..a7e363c2b044 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -108,11 +108,11 @@ impl ModuleInfo { match key.as_str() { "type" => info.type_ = expect_ident(it), - "name" => info.name = expect_byte_string(it), - "author" => info.author = Some(expect_byte_string(it)), - "description" => info.description = Some(expect_byte_string(it)), - "license" => info.license = expect_byte_string(it), - "alias" => info.alias = Some(expect_byte_string(it)), + "name" => info.name = expect_string_ascii(it), + "author" => info.author = Some(expect_string(it)), + "description" => info.description = Some(expect_string(it)), + "license" => info.license = expect_string_ascii(it), + "alias" => info.alias = Some(expect_string_ascii(it)), _ => panic!( "Unknown key \"{}\". Valid keys are: {:?}.", key, EXPECTED_KEYS |