SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          RECORD_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "S"
            WHITESPACE " "
            RECORD_EXPR_FIELD_LIST
              L_CURLY "{"
              R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          RECORD_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "S"
            WHITESPACE " "
            RECORD_EXPR_FIELD_LIST
              L_CURLY "{"
              WHITESPACE " "
              RECORD_EXPR_FIELD
                PATH_EXPR
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "x"
              WHITESPACE " "
              R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          RECORD_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "S"
            WHITESPACE " "
            RECORD_EXPR_FIELD_LIST
              L_CURLY "{"
              WHITESPACE " "
              RECORD_EXPR_FIELD
                PATH_EXPR
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "x"
              COMMA ","
              WHITESPACE " "
              RECORD_EXPR_FIELD
                NAME_REF
                  IDENT "y"
                COLON ":"
                WHITESPACE " "
                LITERAL
                  INT_NUMBER "32"
              COMMA ","
              WHITESPACE " "
              R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          RECORD_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "S"
            WHITESPACE " "
            RECORD_EXPR_FIELD_LIST
              L_CURLY "{"
              WHITESPACE " "
              RECORD_EXPR_FIELD
                PATH_EXPR
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "x"
              COMMA ","
              WHITESPACE " "
              RECORD_EXPR_FIELD
                NAME_REF
                  IDENT "y"
                COLON ":"
                WHITESPACE " "
                LITERAL
                  INT_NUMBER "32"
              COMMA ","
              WHITESPACE " "
              DOT2 ".."
              CALL_EXPR
                PATH_EXPR
                  PATH
                    PATH
                      PATH_SEGMENT
                        NAME_REF
                          IDENT "Default"
                    COLON2 "::"
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "default"
                ARG_LIST
                  L_PAREN "("
                  R_PAREN ")"
              WHITESPACE " "
              R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          RECORD_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "S"
            WHITESPACE " "
            RECORD_EXPR_FIELD_LIST
              L_CURLY "{"
              WHITESPACE " "
              RECORD_EXPR_FIELD
                NAME_REF
                  IDENT "x"
                COLON ":"
                WHITESPACE " "
                CALL_EXPR
                  PATH_EXPR
                    PATH
                      PATH_SEGMENT
                        COLON2 "::"
                        NAME_REF
                          IDENT "default"
                  ARG_LIST
                    L_PAREN "("
                    R_PAREN ")"
              WHITESPACE " "
              R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          RECORD_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "TupleStruct"
            WHITESPACE " "
            RECORD_EXPR_FIELD_LIST
              L_CURLY "{"
              WHITESPACE " "
              RECORD_EXPR_FIELD
                NAME_REF
                  INT_NUMBER "0"
                COLON ":"
                WHITESPACE " "
                LITERAL
                  INT_NUMBER "1"
              WHITESPACE " "
              R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"