SOURCE_FILE@0..63
  FN@0..62
    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..62
      L_CURLY@9..10 "{"
      WHITESPACE@10..15 "\n    "
      LET_STMT@15..35
        LET_KW@15..18 "let"
        WHITESPACE@18..19 " "
        RECORD_PAT@19..29
          PATH@19..20
            PATH_SEGMENT@19..20
              NAME_REF@19..20
                IDENT@19..20 "S"
          WHITESPACE@20..21 " "
          RECORD_FIELD_PAT_LIST@21..29
            L_CURLY@21..22 "{"
            WHITESPACE@22..23 " "
            RECORD_FIELD_PAT@23..27
              NAME_REF@23..24
                INT_NUMBER@23..24 "0"
              COLON@24..25 ":"
              WHITESPACE@25..26 " "
              LITERAL_PAT@26..27
                LITERAL@26..27
                  INT_NUMBER@26..27 "1"
            WHITESPACE@27..28 " "
            R_CURLY@28..29 "}"
        WHITESPACE@29..30 " "
        EQ@30..31 "="
        WHITESPACE@31..32 " "
        TUPLE_EXPR@32..34
          L_PAREN@32..33 "("
          R_PAREN@33..34 ")"
        SEMICOLON@34..35 ";"
      WHITESPACE@35..40 "\n    "
      LET_STMT@40..60
        LET_KW@40..43 "let"
        WHITESPACE@43..44 " "
        RECORD_PAT@44..54
          PATH@44..45
            PATH_SEGMENT@44..45
              NAME_REF@44..45
                IDENT@44..45 "S"
          WHITESPACE@45..46 " "
          RECORD_FIELD_PAT_LIST@46..54
            L_CURLY@46..47 "{"
            WHITESPACE@47..48 " "
            RECORD_FIELD_PAT@48..52
              NAME_REF@48..49
                IDENT@48..49 "x"
              COLON@49..50 ":"
              WHITESPACE@50..51 " "
              LITERAL_PAT@51..52
                LITERAL@51..52
                  INT_NUMBER@51..52 "1"
            WHITESPACE@52..53 " "
            R_CURLY@53..54 "}"
        WHITESPACE@54..55 " "
        EQ@55..56 "="
        WHITESPACE@56..57 " "
        TUPLE_EXPR@57..59
          L_PAREN@57..58 "("
          R_PAREN@58..59 ")"
        SEMICOLON@59..60 ";"
      WHITESPACE@60..61 "\n"
      R_CURLY@61..62 "}"
  WHITESPACE@62..63 "\n"