| /* "True" vs "False" vs "Unknown". |
| Copyright (C) 2019-2020 Free Software Foundation, Inc. |
| Contributed by David Malcolm <dmalcolm@redhat.com>. |
| |
| This file is part of GCC. |
| |
| GCC 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 3, or (at your option) |
| any later version. |
| |
| GCC 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 GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "tristate.h" |
| #include "selftest.h" |
| |
| const char * |
| tristate::as_string () const |
| { |
| switch (m_value) |
| { |
| default: |
| gcc_unreachable (); |
| case TS_UNKNOWN: |
| return "UNKNOWN"; |
| case TS_TRUE: |
| return "TRUE"; |
| case TS_FALSE: |
| return "FALSE"; |
| } |
| } |
| |
| tristate |
| tristate::not_ () const |
| { |
| switch (m_value) |
| { |
| default: |
| gcc_unreachable (); |
| case TS_UNKNOWN: |
| return tristate (TS_UNKNOWN); |
| case TS_TRUE: |
| return tristate (TS_FALSE); |
| case TS_FALSE: |
| return tristate (TS_TRUE); |
| } |
| } |
| |
| tristate |
| tristate::or_ (tristate other) const |
| { |
| switch (m_value) |
| { |
| default: |
| gcc_unreachable (); |
| case TS_UNKNOWN: |
| if (other.is_true ()) |
| return tristate (TS_TRUE); |
| else |
| return tristate (TS_UNKNOWN); |
| case TS_FALSE: |
| return other; |
| case TS_TRUE: |
| return tristate (TS_TRUE); |
| } |
| } |
| |
| tristate |
| tristate::and_ (tristate other) const |
| { |
| switch (m_value) |
| { |
| default: |
| gcc_unreachable (); |
| case TS_UNKNOWN: |
| if (other.is_false ()) |
| return tristate (TS_FALSE); |
| else |
| return tristate (TS_UNKNOWN); |
| case TS_TRUE: |
| return other; |
| case TS_FALSE: |
| return tristate (TS_FALSE); |
| } |
| } |
| |
| #if CHECKING_P |
| |
| namespace selftest { |
| |
| #define ASSERT_TRISTATE_TRUE(TRISTATE) \ |
| SELFTEST_BEGIN_STMT \ |
| ASSERT_EQ (TRISTATE, tristate (tristate::TS_TRUE)); \ |
| SELFTEST_END_STMT |
| |
| #define ASSERT_TRISTATE_FALSE(TRISTATE) \ |
| SELFTEST_BEGIN_STMT \ |
| ASSERT_EQ (TRISTATE, tristate (tristate::TS_FALSE)); \ |
| SELFTEST_END_STMT |
| |
| #define ASSERT_TRISTATE_UNKNOWN(TRISTATE) \ |
| SELFTEST_BEGIN_STMT \ |
| ASSERT_EQ (TRISTATE, tristate (tristate::TS_UNKNOWN)); \ |
| SELFTEST_END_STMT |
| |
| /* Test tristate's ctors, along with is_*, as_string, operator==, and |
| operator!=. */ |
| |
| static void |
| test_ctors () |
| { |
| tristate u (tristate::TS_UNKNOWN); |
| ASSERT_FALSE (u.is_known ()); |
| ASSERT_FALSE (u.is_true ()); |
| ASSERT_FALSE (u.is_false ()); |
| ASSERT_STREQ (u.as_string (), "UNKNOWN"); |
| |
| tristate t (tristate::TS_TRUE); |
| ASSERT_TRUE (t.is_known ()); |
| ASSERT_TRUE (t.is_true ()); |
| ASSERT_FALSE (t.is_false ()); |
| ASSERT_STREQ (t.as_string (), "TRUE"); |
| |
| tristate f (tristate::TS_FALSE); |
| ASSERT_TRUE (f.is_known ()); |
| ASSERT_FALSE (f.is_true ()); |
| ASSERT_TRUE (f.is_false ()); |
| ASSERT_STREQ (f.as_string (), "FALSE"); |
| |
| ASSERT_EQ (u, u); |
| ASSERT_EQ (t, t); |
| ASSERT_EQ (f, f); |
| ASSERT_NE (u, t); |
| ASSERT_NE (u, f); |
| ASSERT_NE (t, f); |
| |
| tristate t2 (true); |
| ASSERT_TRUE (t2.is_true ()); |
| ASSERT_EQ (t, t2); |
| |
| tristate f2 (false); |
| ASSERT_TRUE (f2.is_false ()); |
| ASSERT_EQ (f, f2); |
| |
| tristate u2 (tristate::unknown ()); |
| ASSERT_TRUE (!u2.is_known ()); |
| ASSERT_EQ (u, u2); |
| } |
| |
| /* Test && on tristate instances. */ |
| |
| static void |
| test_and () |
| { |
| ASSERT_TRISTATE_UNKNOWN (tristate::unknown () && tristate::unknown ()); |
| |
| ASSERT_TRISTATE_FALSE (tristate (false) && tristate (false)); |
| ASSERT_TRISTATE_FALSE (tristate (false) && tristate (true)); |
| ASSERT_TRISTATE_FALSE (tristate (true) && tristate (false)); |
| ASSERT_TRISTATE_TRUE (tristate (true) && tristate (true)); |
| |
| ASSERT_TRISTATE_UNKNOWN (tristate::unknown () && tristate (true)); |
| ASSERT_TRISTATE_UNKNOWN (tristate (true) && tristate::unknown ()); |
| |
| ASSERT_TRISTATE_FALSE (tristate::unknown () && tristate (false)); |
| ASSERT_TRISTATE_FALSE (tristate (false) && tristate::unknown ()); |
| } |
| |
| /* Test || on tristate instances. */ |
| |
| static void |
| test_or () |
| { |
| ASSERT_TRISTATE_UNKNOWN (tristate::unknown () || tristate::unknown ()); |
| |
| ASSERT_TRISTATE_FALSE (tristate (false) || tristate (false)); |
| ASSERT_TRISTATE_TRUE (tristate (false) || tristate (true)); |
| ASSERT_TRISTATE_TRUE (tristate (true) || tristate (false)); |
| ASSERT_TRISTATE_TRUE (tristate (true) || tristate (true)); |
| |
| ASSERT_TRISTATE_TRUE (tristate::unknown () || tristate (true)); |
| ASSERT_TRISTATE_TRUE (tristate (true) || tristate::unknown ()); |
| |
| ASSERT_TRISTATE_UNKNOWN (tristate::unknown () || tristate (false)); |
| ASSERT_TRISTATE_UNKNOWN (tristate (false) || tristate::unknown ()); |
| } |
| |
| /* Test ! on tristate instances. */ |
| |
| static void |
| test_not () |
| { |
| ASSERT_TRISTATE_UNKNOWN (!tristate::unknown ()); |
| ASSERT_TRISTATE_FALSE (!tristate (true)); |
| ASSERT_TRISTATE_TRUE (!tristate (false)); |
| } |
| |
| /* Run all of the selftests within this file. */ |
| |
| void |
| tristate_cc_tests () |
| { |
| test_ctors (); |
| test_and (); |
| test_or (); |
| test_not (); |
| } |
| |
| } // namespace selftest |
| |
| #endif /* CHECKING_P */ |