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This commit is contained in:
Nicholas Nethercote 2023-12-06 20:43:59 +11:00
parent c6bbb376a2
commit 08b8ba0a32
1 changed files with 8 additions and 4 deletions
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12
compiler/rustc_lexer/src/unescape.rs
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@ -7,7 +7,9 @@ use std::str::Chars;
#[cfg(test)]
mod tests;
/// Errors and warnings that can occur during string unescaping.
/// Errors and warnings that can occur during string unescaping. They mostly
/// relate to malformed escape sequences, but there are a few that are about
/// other problems.
#[derive(Debug, PartialEq, Eq)]
pub enum EscapeError {
/// Expected 1 char, but 0 were found.
@ -73,9 +75,11 @@ impl EscapeError {
}
}
/// Takes a contents of a literal (without quotes) and produces a
/// sequence of escaped characters or errors.
/// Values are returned through invoking of the provided callback.
/// Takes a contents of a literal (without quotes) and produces a sequence of
/// escaped characters or errors.
///
/// Values are returned by invoking `callback`. For `Char` and `Byte` modes,
/// the callback will be called exactly once.
pub fn unescape_literal<F>(src: &str, mode: Mode, callback: &mut F)
where
F: FnMut(Range<usize>, Result<char, EscapeError>),