Method parse_match_patterns

crates/ruff_python_parser/src/parser/pattern.rs:69–85

Entry point to start parsing a pattern. See:

(&mut self)

    ///
    /// See: <https://docs.python.org/3/reference/compound_stmts.html#grammar-token-python-grammar-patterns>
    pub(super) fn parse_match_patterns(&mut self) -> Pattern {
        let start = self.node_start();

        // We don't yet know if it's a sequence pattern or a single pattern, so
        // we need to allow star pattern here.
        let pattern = self.parse_match_pattern(AllowStarPattern::Yes);

        if self.at(TokenKind::Comma) {
            Pattern::MatchSequence(self.parse_sequence_match_pattern(pattern, start, None))
        } else {
            // We know it's not a sequence pattern now, so check for star pattern usage.
            if pattern.is_match_star() {
                self.add_error(ParseErrorType::InvalidStarPatternUsage, &pattern);
            }
            pattern
        }
    }

    /// Parses an `or_pattern` or an `as_pattern`.
    ///