b13c9880f9
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>
64 lines
1.8 KiB
Rust
64 lines
1.8 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
use proc_macro::{token_stream, TokenTree};
|
|
|
|
pub(crate) fn try_ident(it: &mut token_stream::IntoIter) -> Option<String> {
|
|
if let Some(TokenTree::Ident(ident)) = it.next() {
|
|
Some(ident.to_string())
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
pub(crate) fn try_literal(it: &mut token_stream::IntoIter) -> Option<String> {
|
|
if let Some(TokenTree::Literal(literal)) = it.next() {
|
|
Some(literal.to_string())
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
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
|
|
}
|
|
})
|
|
}
|
|
|
|
pub(crate) fn expect_ident(it: &mut token_stream::IntoIter) -> String {
|
|
try_ident(it).expect("Expected Ident")
|
|
}
|
|
|
|
pub(crate) fn expect_punct(it: &mut token_stream::IntoIter) -> char {
|
|
if let TokenTree::Punct(punct) = it.next().expect("Reached end of token stream for Punct") {
|
|
punct.as_char()
|
|
} else {
|
|
panic!("Expected Punct");
|
|
}
|
|
}
|
|
|
|
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) {
|
|
if it.next().is_some() {
|
|
panic!("Expected end");
|
|
}
|
|
}
|