Method parse_patterns

parser/src/parser/parser.rs:800–808

https://docs.python.org/3/reference/compound_stmts.html#grammar-token-python-grammar-patterns The open sequence pattern is either a pattern or maybe star pattern Here we expect at least one ( pattern or maybe star pattern )

(&mut self)

    // The open sequence pattern is either a pattern or maybe star pattern
    // Here we expect at least one ( pattern or maybe star pattern )
    fn parse_patterns(&mut self) -> Result<MatchPattern, ParsingError> {
        let mut patterns = self.parse_open_sequence_pattern()?;

        if patterns.len() == 1 {
            Ok(patterns.remove(0))
        } else {
            Ok(MatchPattern::MatchSequence(patterns))
        }
    }

    fn parse_pattern(&mut self) -> Result<MatchPattern, ParsingError> {
        let or_pattern = self.parse_or_pattern()?;