Method unclosed_class_error

regex/regex-syntax/src/ast/parse.rs:910–922

Return an "unclosed class" error whose span points to the most recently opened class. This should only be called while parsing a character class.

(&self)

    ///
    /// This should only be called while parsing a character class.
    fn unclosed_class_error(&self) -> ast::Error {
        for state in self.parser().stack_class.borrow().iter().rev() {
            match *state {
                ClassState::Open { ref set, .. } => {
                    return self.error(set.span, ast::ErrorKind::ClassUnclosed);
                }
                _ => {}
            }
        }
        // We are guaranteed to have a non-empty stack with at least
        // one open bracket, so we should never get here.
        panic!("no open character class found")
    }

    /// Push the current set of class items on to the class parser's stack as
    /// the left hand side of the given operator.