Function peg$f83

packages/graph/src/grammar.js:1022–1039

(optional, patterns)

    };
  }
  function peg$f83(optional, patterns) {
    // If single pattern, return as-is. If multiple, wrap in MultiPattern.
    if (patterns.length === 1) {
      return {
        type: 'MatchClause',
        pattern: patterns[0],
        optional: optional !== null
      };
    }
    return {
      type: 'MatchClause',
      pattern: {
        type: 'MultiPattern',
        patterns: patterns
      },
      optional: optional !== null
    };
  }
  function peg$f84(head, tail) {
    return [head, ...tail.map(t => t[3])];
  }