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Diffstat (limited to 'testsuite/vests/vhdl-ams/ashenden/compliant/access-types/list_search.vhd')
-rw-r--r-- | testsuite/vests/vhdl-ams/ashenden/compliant/access-types/list_search.vhd | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/access-types/list_search.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/access-types/list_search.vhd new file mode 100644 index 000000000..57208983d --- /dev/null +++ b/testsuite/vests/vhdl-ams/ashenden/compliant/access-types/list_search.vhd @@ -0,0 +1,80 @@ + +-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc + +-- This file is part of VESTs (Vhdl tESTs). + +-- VESTs is free software; you can redistribute it and/or modify it +-- under the terms of the GNU General Public License as published by the +-- Free Software Foundation; either version 2 of the License, or (at +-- your option) any later version. + +-- VESTs is distributed in the hope that it will be useful, but WITHOUT +-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +-- for more details. + +-- You should have received a copy of the GNU General Public License +-- along with VESTs; if not, write to the Free Software Foundation, +-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +entity list_search is + +end entity list_search; + + +---------------------------------------------------------------- + + +architecture test of list_search is + + signal s : bit_vector(0 to 3); + +begin + + process is + + type value_cell; + + type value_ptr is access value_cell; + + type value_cell is record + value : bit_vector(0 to 3); + next_cell : value_ptr; + end record value_cell; + + variable value_list, current_cell : value_ptr; + variable search_value : bit_vector(0 to 3); + + begin + value_list := new value_cell'( B"1000", value_list ); + value_list := new value_cell'( B"0010", value_list ); + value_list := new value_cell'( B"0000", value_list ); + + search_value := B"0010"; + + -- code from book: + + current_cell := value_list; + while current_cell /= null + and current_cell.value /= search_value loop + current_cell := current_cell.next_cell; + end loop; + assert current_cell /= null + report "search for value failed"; + + -- end of code from book + + search_value := B"1111"; + + current_cell := value_list; + while current_cell /= null + and current_cell.value /= search_value loop + current_cell := current_cell.next_cell; + end loop; + assert current_cell /= null + report "search for value failed"; + + wait; + end process; + +end architecture test; |