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    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          PATH_PAT
            PATH
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "foo"
              COLON2 "::"
              PATH_SEGMENT
                NAME_REF
                  IDENT "Bar"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          TUPLE_EXPR
            L_PAREN "("
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          PATH_PAT
            PATH
              PATH_SEGMENT
                COLON2 "::"
                NAME_REF
                  IDENT "Bar"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          TUPLE_EXPR
            L_PAREN "("
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          RECORD_PAT
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "Bar"
            WHITESPACE " "
            RECORD_PAT_FIELD_LIST
              L_CURLY "{"
              WHITESPACE " "
              REST_PAT
                DOT2 ".."
              WHITESPACE " "
              R_CURLY "}"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          TUPLE_EXPR
            L_PAREN "("
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          TUPLE_STRUCT_PAT
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "Bar"
            L_PAREN "("
            REST_PAT
              DOT2 ".."
            R_PAREN ")"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          TUPLE_EXPR
            L_PAREN "("
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"