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- #ifndef BOOST_CONTRACT_TEST_PUBLIC_FUNCTION_CONTRACTS_HPP_
- #define BOOST_CONTRACT_TEST_PUBLIC_FUNCTION_CONTRACTS_HPP_
- // 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 public member function subcontracting (also with old and return values).
- #include "../detail/oteststream.hpp"
- #include "../detail/counter.hpp"
- #include <boost/contract/public_function.hpp>
- #include <boost/contract/base_types.hpp>
- #include <boost/contract/assert.hpp>
- #include <boost/contract/old.hpp>
- #include <boost/contract/check.hpp>
- #include <boost/contract/override.hpp>
- #include <boost/config.hpp>
- #include <string>
- boost::contract::test::detail::oteststream out;
- struct s_tag;
- typedef boost::contract::test::detail::counter<s_tag, std::string> s_type;
- struct except_error {};
- struct result_type {
- std::string value;
- explicit result_type(std::string const& s) : value(s) {}
- private: // Test non-copyable and non-default-constructible result.
- result_type();
- result_type(result_type const&);
- result_type& operator=(result_type const&);
- };
- // Test base without additional bases and pure virtual.
- template<char Id>
- struct t {
- static void static_invariant() { out << Id << "::static_inv" << std::endl; }
-
- void invariant() const {
- out << Id << "::inv" << std::endl;
- BOOST_CONTRACT_ASSERT(z.value != "");
- }
- struct z_tag;
- typedef boost::contract::test::detail::counter<z_tag, std::string> z_type;
- z_type z;
- t() { z.value.push_back(Id); }
- virtual result_type& f(s_type& s, boost::contract::virtual_* v = 0) = 0;
- };
- template<char Id> // Requires: Only pass lower case Id so it'll never be 'X'.
- result_type& t<Id>::f(s_type& s, boost::contract::virtual_* v) {
- std::ostringstream r; r << "none-" << Id;
- static result_type result(r.str());
- boost::contract::old_ptr<z_type> old_z =
- BOOST_CONTRACT_OLDOF(v, z_type::eval(z));
- boost::contract::old_ptr<s_type> old_s;
- boost::contract::check c = boost::contract::public_function(v, result, this)
- .precondition([&] {
- out << Id << "::f::pre" << std::endl;
- BOOST_CONTRACT_ASSERT(s.value[0] == Id || s.value[0] == 'X');
- })
- .old([&] {
- out << Id << "::f::old" << std::endl;
- old_s = BOOST_CONTRACT_OLDOF(v, s_type::eval(s));
- })
- .postcondition([&] (result_type const& result) {
- out << Id << "::f::post" << std::endl;
- BOOST_CONTRACT_ASSERT(z.value == old_z->value + old_s->value);
- BOOST_CONTRACT_ASSERT(s.value.find(old_z->value) !=
- std::string::npos);
- BOOST_CONTRACT_ASSERT(result.value == old_s->value);
- })
- .except([&] {
- out << Id << "::f::except" << std::endl;
- BOOST_CONTRACT_ASSERT(z.value == old_z->value);
- BOOST_CONTRACT_ASSERT(s.value == old_s->value);
- })
- ;
- out << "t<" << Id << ">::f::body" << std::endl;
- if(s.value == "X") throw except_error();
- return result;
- }
- // Test base with other bases, multiple inheritance, and no subcontracting from
- // protected and private bases (even if fully contracted).
- 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; }
-
- void invariant() const {
- out << "c::inv" << std::endl;
- BOOST_CONTRACT_ASSERT(y.value != "");
- }
- struct y_tag;
- typedef boost::contract::test::detail::counter<y_tag, std::string> y_type;
- y_type y;
- c() { y.value = "c"; }
- virtual result_type& f(s_type& s, boost::contract::virtual_* v = 0)
- /* override */ {
- static result_type result("none-c");
- boost::contract::old_ptr<y_type> old_y =
- BOOST_CONTRACT_OLDOF(v, y_type::eval(y));
- boost::contract::old_ptr<s_type> old_s;
- boost::contract::check c = boost::contract::public_function<
- override_f>(v, result, &c::f, this, s)
- .precondition([&] {
- out << "c::f::pre" << std::endl;
- BOOST_CONTRACT_ASSERT(s.value == "C" || s.value == "X");
- })
- .old([&] {
- out << "c::f::old" << std::endl;
- old_s = BOOST_CONTRACT_OLDOF(v, s_type::eval(s));
- })
- .postcondition([&] (result_type const& result) {
- out << "c::f::post" << std::endl;
- BOOST_CONTRACT_ASSERT(y.value == old_y->value + old_s->value);
- BOOST_CONTRACT_ASSERT(s.value.find(old_y->value) !=
- std::string::npos);
- BOOST_CONTRACT_ASSERT(result.value == old_s->value);
- })
- .except([&] {
- out << "c::f::except" << std::endl;
- BOOST_CONTRACT_ASSERT(y.value == old_y->value);
- BOOST_CONTRACT_ASSERT(s.value == old_s->value);
- })
- ;
- out << "c::f::body" << std::endl;
- if(s.value == "X") throw except_error();
- std::string save_s = s.value;
- std::string save = y.value;
- y.value += save_s;
- s.value = save;
- save = t<'d'>::z.value;
- t<'d'>::z.value += save_s;
- s.value += save;
- save = t<'e'>::z.value;
- t<'e'>::z.value += save_s;
- s.value += save;
- result.value = save_s;
- return result;
- }
- BOOST_CONTRACT_OVERRIDE(f)
- };
- // Test no subcontracting from not (fully) contracted base.
- struct b {
- static void static_invariant() { out << "b::static_inv" << std::endl; }
- void invariant() const { out << "b::inv" << std::endl; }
- virtual ~b() {}
- // No contract (no virtual_ so this is not actually overridden by a::f).
- virtual result_type& f(s_type& s) {
- static result_type result("none-b");
- out << "b::f::body" << std::endl;
- result.value = s.value;
- return result;
- }
- };
- // Test public function 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; }
-
- void invariant() const {
- out << "a::inv" << std::endl;
- BOOST_CONTRACT_ASSERT(x.value != "");
- }
- struct x_tag;
- typedef boost::contract::test::detail::counter<x_tag, std::string> x_type;
- x_type x;
- a() { x.value = "a"; }
- #if defined(BOOST_GCC)
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Woverloaded-virtual" // For a::f.
- #elif defined(BOOST_CLANG)
- #pragma clang diagnostic push
- #pragma clang diagnostic ignored "-Woverloaded-virtual" // For a::f.
- #endif
- // Must use virtual_ even if no longer decl virtual for correct overloading.
- // NOTE: This intentionally hides but does not override `b::f` (it overrides
- // `c::f` instead). This generates warnings on some compilers (Clang, etc.).
- result_type& f(s_type& s, boost::contract::virtual_* v = 0)
- /* override */ {
- static result_type result("none-a");
- boost::contract::old_ptr<x_type> old_x =
- BOOST_CONTRACT_OLDOF(v, x_type::eval(x));
- boost::contract::old_ptr<s_type> old_s;
- boost::contract::check c = boost::contract::public_function<
- override_f>(v, result, &a::f, this, s)
- .precondition([&] {
- out << "a::f::pre" << std::endl;
- BOOST_CONTRACT_ASSERT(s.value == "A" || s.value == "X");
- })
- .old([&] {
- out << "a::f::old" << std::endl;
- old_s = BOOST_CONTRACT_OLDOF(v, s_type::eval(s));
- })
- .postcondition([&] (result_type const& result) {
- out << "a::f::post" << std::endl;
- BOOST_CONTRACT_ASSERT(x.value == old_x->value + old_s->value);
- BOOST_CONTRACT_ASSERT(s.value.find(old_x->value) !=
- std::string::npos);
- BOOST_CONTRACT_ASSERT(result.value == old_s->value);
- })
- .except([&] {
- out << "a::f::except" << std::endl;
- BOOST_CONTRACT_ASSERT(x.value == old_x->value);
- BOOST_CONTRACT_ASSERT(s.value == old_s->value);
- })
- ;
- out << "a::f::body" << std::endl;
- if(s.value == "X") throw except_error();
- std::string save_s = s.value;
- std::string save = x.value;
- x.value += save_s;
- s.value = save;
- save = y.value;
- y.value += save_s;
- s.value += save;
- save = t<'d'>::z.value;
- t<'d'>::z.value += save_s;
- s.value += save;
- save = t<'e'>::z.value;
- t<'e'>::z.value += save_s;
- s.value += save;
- result.value = save_s;
- return result;
- }
- BOOST_CONTRACT_OVERRIDE(f)
- #if defined(BOOST_GCC)
- #pragma GCC diagnostic pop
- #elif defined(BOOST_CLANG)
- #pragma clang diagnostic pop
- #endif
- };
-
- #endif // #include guard
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