SOURCE_FILE@0..58
  FN@0..57
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..6
      IDENT@3..6 "foo"
    PARAM_LIST@6..8
      L_PAREN@6..7 "("
      R_PAREN@7..8 ")"
    WHITESPACE@8..9 " "
    BLOCK_EXPR@9..57
      L_CURLY@9..10 "{"
      WHITESPACE@10..15 "\n    "
      MATCH_EXPR@15..55
        MATCH_KW@15..20 "match"
        WHITESPACE@20..21 " "
        TUPLE_EXPR@21..23
          L_PAREN@21..22 "("
          R_PAREN@22..23 ")"
        WHITESPACE@23..24 " "
        MATCH_ARM_LIST@24..55
          L_CURLY@24..25 "{"
          WHITESPACE@25..34 "\n        "
          MATCH_ARM@34..48
            PLACEHOLDER_PAT@34..35
              UNDERSCORE@34..35 "_"
            WHITESPACE@35..36 " "
            MATCH_GUARD@36..42
              IF_KW@36..38 "if"
              WHITESPACE@38..39 " "
              PATH_EXPR@39..42
                PATH@39..42
                  PATH_SEGMENT@39..42
                    NAME_REF@39..42
                      IDENT@39..42 "foo"
            WHITESPACE@42..43 " "
            FAT_ARROW@43..45 "=>"
            WHITESPACE@45..46 " "
            TUPLE_EXPR@46..48
              L_PAREN@46..47 "("
              R_PAREN@47..48 ")"
          COMMA@48..49 ","
          WHITESPACE@49..54 "\n    "
          R_CURLY@54..55 "}"
      WHITESPACE@55..56 "\n"
      R_CURLY@56..57 "}"
  WHITESPACE@57..58 "\n"