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omit unnecessary bits when explicit operator conversions are supported

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This commit is contained in:
James E. King III
2018-10-16 15:04:44 -04:00
parent d76d7dc4d2
commit 82a233bee1
10 changed files with 197 additions and 7 deletions
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test/tribool_test.cpp
+22 -5
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@@ -3,7 +3,7 @@
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <boost/core/ignore_unused.hpp>
#include <boost/config.hpp>
#include <boost/logic/tribool.hpp>
#include <boost/test/minimal.hpp>
#include <iostream>
@@ -16,6 +16,19 @@ int test_main(int, char*[])
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);
@@ -115,7 +128,7 @@ int test_main(int, char*[])
BOOST_CHECK(false);
}
#ifndef BOOST_NO_CXX11_CONSTEXPR
#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];
@@ -127,9 +140,13 @@ int test_main(int, char*[])
BOOST_CHECK(sizeof(array_ands) / sizeof(char) == 3);
constexpr bool res_safe_bool = static_cast<bool>( tribool(true) );
boost::ignore_unused(res_safe_bool);
constexpr tribool xxx = (tribool(true) || tribool(indeterminate));
static_assert(xxx, "Must be 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";