SOURCE_FILE@0..97
  FN@0..96
    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..96
      L_CURLY@9..10 "{"
      WHITESPACE@10..15 "\n    "
      LET_STMT@15..28
        LET_KW@15..18 "let"
        WHITESPACE@18..19 " "
        TUPLE_STRUCT_PAT@19..22
          PATH@19..20
            PATH_SEGMENT@19..20
              NAME_REF@19..20
                IDENT@19..20 "S"
          L_PAREN@20..21 "("
          R_PAREN@21..22 ")"
        WHITESPACE@22..23 " "
        EQ@23..24 "="
        WHITESPACE@24..25 " "
        TUPLE_EXPR@25..27
          L_PAREN@25..26 "("
          R_PAREN@26..27 ")"
        SEMICOLON@27..28 ";"
      WHITESPACE@28..33 "\n    "
      LET_STMT@33..47
        LET_KW@33..36 "let"
        WHITESPACE@36..37 " "
        TUPLE_STRUCT_PAT@37..41
          PATH@37..38
            PATH_SEGMENT@37..38
              NAME_REF@37..38
                IDENT@37..38 "S"
          L_PAREN@38..39 "("
          WILDCARD_PAT@39..40
            UNDERSCORE@39..40 "_"
          R_PAREN@40..41 ")"
        WHITESPACE@41..42 " "
        EQ@42..43 "="
        WHITESPACE@43..44 " "
        TUPLE_EXPR@44..46
          L_PAREN@44..45 "("
          R_PAREN@45..46 ")"
        SEMICOLON@46..47 ";"
      WHITESPACE@47..52 "\n    "
      LET_STMT@52..67
        LET_KW@52..55 "let"
        WHITESPACE@55..56 " "
        TUPLE_STRUCT_PAT@56..61
          PATH@56..57
            PATH_SEGMENT@56..57
              NAME_REF@56..57
                IDENT@56..57 "S"
          L_PAREN@57..58 "("
          WILDCARD_PAT@58..59
            UNDERSCORE@58..59 "_"
          COMMA@59..60 ","
          R_PAREN@60..61 ")"
        WHITESPACE@61..62 " "
        EQ@62..63 "="
        WHITESPACE@63..64 " "
        TUPLE_EXPR@64..66
          L_PAREN@64..65 "("
          R_PAREN@65..66 ")"
        SEMICOLON@66..67 ";"
      WHITESPACE@67..72 "\n    "
      LET_STMT@72..94
        LET_KW@72..75 "let"
        WHITESPACE@75..76 " "
        TUPLE_STRUCT_PAT@76..88
          PATH@76..77
            PATH_SEGMENT@76..77
              NAME_REF@76..77
                IDENT@76..77 "S"
          L_PAREN@77..78 "("
          WILDCARD_PAT@78..79
            UNDERSCORE@78..79 "_"
          COMMA@79..80 ","
          WHITESPACE@80..81 " "
          REST_PAT@81..83
            DOT2@81..83 ".."
          WHITESPACE@83..84 " "
          COMMA@84..85 ","
          WHITESPACE@85..86 " "
          IDENT_PAT@86..87
            NAME@86..87
              IDENT@86..87 "x"
          R_PAREN@87..88 ")"
        WHITESPACE@88..89 " "
        EQ@89..90 "="
        WHITESPACE@90..91 " "
        TUPLE_EXPR@91..93
          L_PAREN@91..92 "("
          R_PAREN@92..93 ")"
        SEMICOLON@93..94 ";"
      WHITESPACE@94..95 "\n"
      R_CURLY@95..96 "}"
  WHITESPACE@96..97 "\n"