1 2 // Copyright (C) 2008-2018 Lorenzo Caminiti 3 // Distributed under the Boost Software License, Version 1.0 (see accompanying 4 // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt). 5 // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html 6 7 // Test overriding function never overrides protected function contract. 8 9 #include "../detail/oteststream.hpp" 10 #include <boost/contract/function.hpp> 11 #include <boost/contract/public_function.hpp> 12 #include <boost/contract/base_types.hpp> 13 #include <boost/contract/check.hpp> 14 #include <boost/detail/lightweight_test.hpp> 15 #include <sstream> 16 17 boost::contract::test::detail::oteststream out; 18 19 struct b { static_invariantb20 static void static_invariant() { out << "b::static_inv" << std::endl; } invariantb21 void invariant() const { out << "b::inv" << std::endl; } 22 23 protected: 24 // NOTE: This is the correct way of programming contracts for overridden 25 // protected and overriding public functions: Both must use virtual_ 26 // (otherwise C++ won't override because mismatching parameters), but 27 // overridden protected does not use public_function. fb28 virtual void f(boost::contract::virtual_* /* v */ = 0) { 29 boost::contract::check c = boost::contract::function() 30 .precondition([] { out << "b::f::pre" << std::endl; }) 31 .old([] { out << "b::f::old" << std::endl; }) 32 .postcondition([] { out << "b::f::post" << std::endl; }) 33 ; 34 out << "b::f::body" << std::endl; 35 } 36 }; 37 struct a 38 #define BASES public b 39 : BASES 40 { 41 typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types; 42 #undef BASES 43 static_invarianta44 static void static_invariant() { out << "a::static_inv" << std::endl; } invarianta45 void invariant() const { out << "a::inv" << std::endl; } 46 fa47 void f(boost::contract::virtual_* v = 0) /* not override */ { 48 // C++ func a::f overrides b::f, but contracts don't (so no override_f). 49 boost::contract::check c = boost::contract::public_function(v, this) 50 .precondition([] { out << "a::f::pre" << std::endl; }) 51 .old([] { out << "a::f::old" << std::endl; }) 52 .postcondition([] { out << "a::f::post" << std::endl; }) 53 ; 54 out << "a::f::body" << std::endl; 55 } 56 }; 57 main()58int main() { 59 std::ostringstream ok; 60 61 a aa; 62 out.str(""); 63 aa.f(); 64 ok.str(""); ok 65 #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS 66 << "a::static_inv" << std::endl 67 << "a::inv" << std::endl 68 #endif 69 #ifndef BOOST_CONTRACT_NO_PRECONDITIONS 70 << "a::f::pre" << std::endl 71 #endif 72 #ifndef BOOST_CONTRACT_NO_OLDS 73 << "a::f::old" << std::endl 74 #endif 75 << "a::f::body" << std::endl 76 #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS 77 << "a::static_inv" << std::endl 78 << "a::inv" << std::endl 79 #endif 80 #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS 81 << "a::f::post" << std::endl 82 #endif 83 ; 84 BOOST_TEST(out.eq(ok.str())); 85 86 return boost::report_errors(); 87 } 88 89