108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
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// Copyright (C) 2008-2018 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0 (see accompanying
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// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
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// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
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// Test friend functions (also forcing them to check invariants).
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#include "../detail/oteststream.hpp"
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#include <boost/contract/public_function.hpp>
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#include <boost/contract/function.hpp>
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#include <boost/contract/check.hpp>
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#include <boost/contract/assert.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <sstream>
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boost::contract::test::detail::oteststream out;
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class y;
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class z;
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class x {
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public:
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void invariant() const {
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out << "x::inv" << std::endl;
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BOOST_CONTRACT_ASSERT(get() >= 0);
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}
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x() : value_(0) {}
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int get() const { return value_; }
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friend void f(x&, y&, int value);
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private:
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int value_;
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};
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class y {
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public:
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void invariant() const {
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out << "y::inv" << std::endl;
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BOOST_CONTRACT_ASSERT(get() >= 0);
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}
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y() : value_(0) {}
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int get() const { return value_; }
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friend void f(x&, y&, int value);
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private:
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int value_;
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};
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void f(x& a, y& b, int value) {
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boost::contract::check post = boost::contract::function()
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.postcondition([&] {
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out << "f::post" << std::endl;
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BOOST_CONTRACT_ASSERT(a.get() == value);
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BOOST_CONTRACT_ASSERT(b.get() == value);
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})
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;
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boost::contract::check inv_b = boost::contract::public_function(&b);
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boost::contract::check inv_a = boost::contract::public_function(&a);
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boost::contract::check pre = boost::contract::function()
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.precondition([&] {
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out << "f::pre" << std::endl;
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BOOST_CONTRACT_ASSERT(value > 0);
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})
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;
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out << "f::body" << std::endl;
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a.value_ = b.value_ = value;
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}
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int main() {
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std::ostringstream ok;
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x a;
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y b;
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out.str("");
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f(a, b, 123);
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ok.str(""); ok
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#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
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<< "y::inv" << std::endl
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<< "x::inv" << std::endl
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#endif
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#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
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<< "f::pre" << std::endl
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#endif
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<< "f::body" << std::endl
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#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
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<< "x::inv" << std::endl
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<< "y::inv" << std::endl
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#endif
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#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
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<< "f::post" << std::endl
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#endif
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;
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BOOST_TEST(out.eq(ok.str()));
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BOOST_TEST_EQ(a.get(), 123);
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BOOST_TEST_EQ(b.get(), 123);
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return boost::report_errors();
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}
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