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- // (C) Copyright Steve Cleary & John Maddock 2000.
- // Use, modification and distribution are 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)
- // See http://www.boost.org for most recent version including documentation.
- #include <boost/static_assert.hpp>
- //
- // all these tests should succeed.
- // some of these tests are rather simplistic (ie useless)
- // in order to ensure that they compile on all platforms.
- //
- // Namespace scope
- BOOST_STATIC_ASSERT(sizeof(int) >= sizeof(short));
- BOOST_STATIC_ASSERT(sizeof(char) == 1);
- BOOST_STATIC_ASSERT_MSG(sizeof(int) >= sizeof(short), "msg1");
- BOOST_STATIC_ASSERT_MSG(sizeof(char) == 1, "msg2");
- // Function (block) scope
- void f()
- {
- BOOST_STATIC_ASSERT(sizeof(int) >= sizeof(short));
- BOOST_STATIC_ASSERT(sizeof(char) == 1);
- BOOST_STATIC_ASSERT_MSG(sizeof(int) >= sizeof(short), "msg3");
- BOOST_STATIC_ASSERT_MSG(sizeof(char) == 1, "msg4");
- }
- struct Bob
- {
- private: // can be in private, to avoid namespace pollution
- BOOST_STATIC_ASSERT(sizeof(int) >= sizeof(short));
- BOOST_STATIC_ASSERT(sizeof(char) == 1);
- BOOST_STATIC_ASSERT_MSG(sizeof(int) >= sizeof(short), "msg5");
- BOOST_STATIC_ASSERT_MSG(sizeof(char) == 1, "msg6");
- public:
- // Member function scope: provides access to member variables
- int x;
- char c;
- int f()
- {
- #if defined(_MSC_VER) && _MSC_VER < 1300 // broken sizeof in VC6
- BOOST_STATIC_ASSERT(sizeof(x) >= sizeof(short));
- BOOST_STATIC_ASSERT(sizeof(c) == 1);
- BOOST_STATIC_ASSERT_MSG(sizeof(x) >= sizeof(short), "msg7");
- BOOST_STATIC_ASSERT_MSG(sizeof(c) == 1, "msg8");
- #endif
- return x;
- }
- };
- // Template class scope
- template <class Int, class Char>
- struct Bill
- {
- BOOST_STATIC_CONSTANT(int, value = 1);
- private: // can be in private, to avoid namespace pollution
- BOOST_STATIC_ASSERT(sizeof(Int) > sizeof(char));
- BOOST_STATIC_ASSERT_MSG(sizeof(Int) > sizeof(char), "msg9");
- public:
- // Template member function scope: provides access to member variables
- Int x;
- Char c;
- template <class Int2, class Char2>
- void f(Int2 , Char2 )
- {
- BOOST_STATIC_ASSERT(sizeof(Int) == sizeof(Int2));
- BOOST_STATIC_ASSERT(sizeof(Char) == sizeof(Char2));
- BOOST_STATIC_ASSERT_MSG(sizeof(Int) == sizeof(Int2), "msg10");
- BOOST_STATIC_ASSERT_MSG(sizeof(Char) == sizeof(Char2), "msg11");
- }
- };
- void test_Bill() // BOOST_STATIC_ASSERTs are not triggerred until instantiated
- {
- Bill<int, char> z;
- //Bill<int, int> bad; // will not compile
- int i = 3;
- char ch = 'a';
- z.f(i, ch);
- //z.f(i, i); // should not compile
- }
- int main()
- {
- test_Bill();
- //
- // Test variadic macro support:
- //
- #ifndef BOOST_NO_CXX11_VARIADIC_MACROS
- BOOST_STATIC_ASSERT(Bill<int, char>::value);
- #ifndef BOOST_NO_CXX11_STATIC_ASSERT
- BOOST_STATIC_ASSERT_MSG(Bill<int, char>::value, "This is a message");
- #endif
- #endif
- return 0;
- }
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