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- // Copyright Douglas Gregor 2002-2003. Use, modification and
- // distribution is subject to the Boost Software License, Version
- // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/config.hpp>
- #include <boost/logic/tribool.hpp>
- #include <boost/test/minimal.hpp>
- #include <iostream>
- int test_main(int, char*[])
- {
- using namespace boost::logic;
- tribool x; // false
- tribool y(true); // true
- tribool z(indeterminate); // indeterminate
- #if defined( BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS )
- // c++03 allows for implicit conversion to bool
- // c++11 uses an explicit conversion operator so this would not compile
- // and that is tested in the compile-fail/implicit.cpp file
- // so we check the conversion to ensure it is sane
- bool bx = x;
- BOOST_CHECK(bx == false);
- bool by = y;
- BOOST_CHECK(by == true);
- bool bz = z;
- BOOST_CHECK(bz == false);
- #endif
- BOOST_CHECK(!x);
- BOOST_CHECK(x == false);
- BOOST_CHECK(false == x);
- BOOST_CHECK(x != true);
- BOOST_CHECK(true != x);
- BOOST_CHECK(indeterminate(x == indeterminate));
- BOOST_CHECK(indeterminate(indeterminate == x));
- BOOST_CHECK(indeterminate(x != indeterminate));
- BOOST_CHECK(indeterminate(indeterminate != x));
- BOOST_CHECK(x == x);
- BOOST_CHECK(!(x != x));
- BOOST_CHECK(!(x && true));
- BOOST_CHECK(!(true && x));
- BOOST_CHECK(x || true);
- BOOST_CHECK(true || x);
- BOOST_CHECK(y);
- BOOST_CHECK(y == true);
- BOOST_CHECK(true == y);
- BOOST_CHECK(y != false);
- BOOST_CHECK(false != y);
- BOOST_CHECK(indeterminate(y == indeterminate));
- BOOST_CHECK(indeterminate(indeterminate == y));
- BOOST_CHECK(indeterminate(y != indeterminate));
- BOOST_CHECK(indeterminate(indeterminate != y));
- BOOST_CHECK(y == y);
- BOOST_CHECK(!(y != y));
- BOOST_CHECK(indeterminate(z || !z));
- BOOST_CHECK(indeterminate(z == true));
- BOOST_CHECK(indeterminate(true == z));
- BOOST_CHECK(indeterminate(z == false));
- BOOST_CHECK(indeterminate(false == z));
- BOOST_CHECK(indeterminate(z == indeterminate));
- BOOST_CHECK(indeterminate(indeterminate == z));
- BOOST_CHECK(indeterminate(z != indeterminate));
- BOOST_CHECK(indeterminate(indeterminate != z));
- BOOST_CHECK(indeterminate(z == z));
- BOOST_CHECK(indeterminate(z != z));
- BOOST_CHECK(!(x == y));
- BOOST_CHECK(x != y);
- BOOST_CHECK(indeterminate(x == z));
- BOOST_CHECK(indeterminate(x != z));
- BOOST_CHECK(indeterminate(y == z));
- BOOST_CHECK(indeterminate(y != z));
- BOOST_CHECK(!(x && y));
- BOOST_CHECK(x || y);
- BOOST_CHECK(!(x && z));
- BOOST_CHECK(indeterminate(y && z));
- BOOST_CHECK(indeterminate(z && z));
- BOOST_CHECK(indeterminate(z || z));
- BOOST_CHECK(indeterminate(x || z));
- BOOST_CHECK(y || z);
- BOOST_CHECK(indeterminate(y && indeterminate));
- BOOST_CHECK(indeterminate(indeterminate && y));
- BOOST_CHECK(!(x && indeterminate));
- BOOST_CHECK(!(indeterminate && x));
- BOOST_CHECK(indeterminate || y);
- BOOST_CHECK(y || indeterminate);
- BOOST_CHECK(indeterminate(x || indeterminate));
- BOOST_CHECK(indeterminate(indeterminate || x));
- // Test the if (z) ... else (!z) ... else ... idiom
- if (z) {
- BOOST_CHECK(false);
- }
- else if (!z) {
- BOOST_CHECK(false);
- }
- else {
- BOOST_CHECK(true);
- }
- z = true;
- if (z) {
- BOOST_CHECK(true);
- }
- else if (!z) {
- BOOST_CHECK(false);
- }
- else {
- BOOST_CHECK(false);
- }
- z = false;
- if (z) {
- BOOST_CHECK(false);
- }
- else if (!z) {
- BOOST_CHECK(true);
- }
- else {
- BOOST_CHECK(false);
- }
- #if !defined(BOOST_NO_CXX11_CONSTEXPR)
- constexpr bool res_ors = indeterminate(false || tribool(false) || false || indeterminate); // true
- BOOST_CHECK(res_ors);
- char array_ors[res_ors ? 2 : 3];
- BOOST_CHECK(sizeof(array_ors) / sizeof(char) == 2);
- constexpr bool res_ands = !indeterminate(!(true && tribool(true) && true && indeterminate)); // false
- BOOST_CHECK(!res_ands);
- char array_ands[res_ands ? 2 : 3];
- BOOST_CHECK(sizeof(array_ands) / sizeof(char) == 3);
- constexpr bool res_safe_bool = static_cast<bool>( tribool(true) );
- BOOST_STATIC_ASSERT(res_safe_bool);
- // gcc 4.6 chokes on the xxx assignment
- # if !BOOST_WORKAROUND(BOOST_GCC, < 40700)
- constexpr tribool xxx = (tribool(true) || tribool(indeterminate));
- BOOST_STATIC_ASSERT(xxx);
- # endif
- #endif
- std::cout << "no errors detected\n";
- return 0;
- }
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