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- // Copyright (C) 2008-2018 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0 (see accompanying
- // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
- // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
- // Test destructor subcontracting.
- #include "../detail/oteststream.hpp"
- #include "../detail/counter.hpp"
- #include <boost/contract/destructor.hpp>
- #include <boost/contract/base_types.hpp>
- #include <boost/contract/assert.hpp>
- #include <boost/contract/old.hpp>
- #include <boost/contract/check.hpp>
- #include <boost/preprocessor/control/iif.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <sstream>
- boost::contract::test::detail::oteststream out;
- template<char Id>
- struct t {
- static void static_invariant() {
- out << Id << "::static_inv" << std::endl;
- BOOST_CONTRACT_ASSERT(l.value >= 0);
- }
-
- void invariant() const {
- out << Id << "::inv" << std::endl;
- BOOST_CONTRACT_ASSERT(k_ < 0);
- }
- struct l_tag;
- typedef boost::contract::test::detail::counter<l_tag, int> l_type;
- static l_type l;
- explicit t() : k_(-1) { ++l.value; }
- virtual ~t() {
- boost::contract::old_ptr<l_type> old_l;
- boost::contract::check c = boost::contract::destructor(this)
- .old([&] {
- out << Id << "::dtor::old" << std::endl;
- old_l = BOOST_CONTRACT_OLDOF(l_type::eval(l));
- })
- .postcondition([&old_l] {
- out << Id << "::dtor::post" << std::endl;
- BOOST_CONTRACT_ASSERT(t<Id>::l.value == old_l->value - 1);
- })
- ;
- out << Id << "::dtor::body" << std::endl;
- --l.value;
- }
- private:
- int k_;
- };
- template<char Id> typename t<Id>::l_type t<Id>::l;
- // Test deep inheritance (2 vertical levels), multiple inheritance (4
- // horizontal levels), and that all public/protected/private part of
- // subcontracting for destructors (not just public, because all access levels
- // are part of C++ object destruction mechanism).
- struct c
- #define BASES public t<'d'>, protected t<'p'>, private t<'q'>, public t<'e'>
- : BASES
- {
- typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
- #undef BASES
- static void static_invariant() {
- out << "c::static_inv" << std::endl;
- BOOST_CONTRACT_ASSERT(m.value >= 0);
- }
-
- void invariant() const {
- out << "c::inv" << std::endl;
- BOOST_CONTRACT_ASSERT(j_ < 0);
- }
-
- struct m_tag;
- typedef boost::contract::test::detail::counter<m_tag, int> m_type;
- static m_type m;
- explicit c() : j_(-1) { ++m.value; }
- virtual ~c() {
- boost::contract::old_ptr<m_type> old_m =
- BOOST_CONTRACT_OLDOF(m_type::eval(m));
- boost::contract::check c = boost::contract::destructor(this)
- .old([] {
- out << "c::dtor::old" << std::endl;
- // Test old-of assignment above instead.
- })
- .postcondition([&old_m] {
- out << "c::dtor::post" << std::endl;
- BOOST_CONTRACT_ASSERT(c::m.value == old_m->value - 1);
- })
- ;
- out << "c::dtor::body" << std::endl;
- --m.value;
- }
- private:
- int j_;
- };
- c::m_type c::m;
- // Test not (fully) contracted base is not part of destructor subcontracting.
- struct b {
- static void static_invariant() { out << "b::static_inv" << std::endl; }
- void invariant() const { out << "b::inv" << std::endl; }
- explicit b() {}
- virtual ~b() {} // No contract.
- };
- struct a_n_tag; // Global decl so visible in MSVC10 lambdas.
- typedef boost::contract::test::detail::counter<a_n_tag, int> a_n_type;
- // Test destructor with both non-contracted and contracted bases.
- struct a
- #define BASES public b, public c
- : BASES
- {
- typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
- #undef BASES
- static void static_invariant() {
- out << "a::static_inv" << std::endl;
- BOOST_CONTRACT_ASSERT(n.value >= 0);
- }
- void invariant() const {
- out << "a::inv" << std::endl;
- BOOST_CONTRACT_ASSERT(i_ < 0);
- }
- static a_n_type n;
- explicit a() : i_(-1) {
- ++i_; --i_; // To avoid a warning when all contracts off.
- ++n.value;
- }
- virtual ~a() {
- boost::contract::old_ptr<a_n_type> old_n;
- boost::contract::check c = boost::contract::destructor(this)
- .old([&] {
- out << "a::dtor::old" << std::endl;
- old_n = BOOST_CONTRACT_OLDOF(a_n_type::eval(n));
- })
- .postcondition([&old_n] {
- out << "a::dtor::post" << std::endl;
- BOOST_CONTRACT_ASSERT(a::n.value == old_n->value - 1);
- })
- ;
- out << "a::dtor::body" << std::endl;
- --n.value;
- }
- private:
- int i_;
- };
- a_n_type a::n;
- int main() {
- std::ostringstream ok;
- {
- a aa;
- out.str("");
- } // Call aa's destructor.
- ok.str(""); ok
- #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
- << "a::static_inv" << std::endl
- << "a::inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_OLDS
- << "a::dtor::old" << std::endl
- #endif
- << "a::dtor::body" << std::endl
- // Test static inv, but not const inv, checked after destructor body.
- #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
- << "a::static_inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- << "a::dtor::post" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
- << "c::static_inv" << std::endl
- << "c::inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_OLDS
- << "c::dtor::old" << std::endl
- #endif
- << "c::dtor::body" << std::endl
- #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
- << "c::static_inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- << "c::dtor::post" << std::endl
- #endif
-
- #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
- << "e::static_inv" << std::endl
- << "e::inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_OLDS
- << "e::dtor::old" << std::endl
- #endif
- << "e::dtor::body" << std::endl
- #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
- << "e::static_inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- << "e::dtor::post" << std::endl
- #endif
-
- // Test check also private bases (because part of C++ destruction).
- #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
- << "q::static_inv" << std::endl
- << "q::inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_OLDS
- << "q::dtor::old" << std::endl
- #endif
- << "q::dtor::body" << std::endl
- #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
- << "q::static_inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- << "q::dtor::post" << std::endl
- #endif
-
- // Test check also protected bases (because part of C++ destruction).
- #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
- << "p::static_inv" << std::endl
- << "p::inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_OLDS
- << "p::dtor::old" << std::endl
- #endif
- << "p::dtor::body" << std::endl
- #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
- << "p::static_inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- << "p::dtor::post" << std::endl
- #endif
-
- #ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
- << "d::static_inv" << std::endl
- << "d::inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_OLDS
- << "d::dtor::old" << std::endl
- #endif
- << "d::dtor::body" << std::endl
- #ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
- << "d::static_inv" << std::endl
- #endif
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- << "d::dtor::post" << std::endl
- #endif
- ;
- BOOST_TEST(out.eq(ok.str()));
- #ifndef BOOST_CONTRACT_NO_OLDS
- #define BOOST_CONTRACT_TEST_old 1u
- #else
- #define BOOST_CONTRACT_TEST_old 0u
- #endif
- // Followings destroy only copies (actual objects are static data members).
- BOOST_TEST_EQ(a_n_type::copies(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(a_n_type::evals(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(a_n_type::copies(), a_n_type::dtors()); // No leak.
-
- BOOST_TEST_EQ(c::m_type::copies(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(c::m_type::evals(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(c::m_type::copies(), c::m_type::dtors()); // No leak.
-
- BOOST_TEST_EQ(t<'d'>::l_type::copies(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'d'>::l_type::evals(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'d'>::l_type::copies(), t<'d'>::l_type::dtors()); // No leak
-
- BOOST_TEST_EQ(t<'p'>::l_type::copies(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'p'>::l_type::evals(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'p'>::l_type::copies(), t<'p'>::l_type::dtors()); // No leak
-
- BOOST_TEST_EQ(t<'q'>::l_type::copies(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'q'>::l_type::evals(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'q'>::l_type::copies(), t<'q'>::l_type::dtors()); // No leak
-
- BOOST_TEST_EQ(t<'e'>::l_type::copies(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'e'>::l_type::evals(), BOOST_CONTRACT_TEST_old);
- BOOST_TEST_EQ(t<'e'>::l_type::copies(), t<'e'>::l_type::dtors()); // No leak
- #undef BOOST_CONTRACT_TEST_old
- return boost::report_errors();
- }
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