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47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
// Copyright (c) 2018-2025 Jean-Louis Leroy
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// tag::content[]
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// static_main.cpp
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#include "animals.hpp"
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#include <boost/openmethod/initialize.hpp>
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#include <iostream>
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using namespace boost::openmethod::aliases;
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struct Cow : Herbivore {};
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struct Wolf : Carnivore {};
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BOOST_OPENMETHOD_CLASSES(Animal, Herbivore, Cow, Wolf, Carnivore);
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BOOST_OPENMETHOD_OVERRIDE(
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meet, (virtual_ptr<Animal>, virtual_ptr<Animal>), std::string) {
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return "greet";
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}
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extern "C" {
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#ifdef _WIN32
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__declspec(dllimport)
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#endif
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auto make_tiger() -> Animal*;
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}
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auto main() -> int {
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boost::openmethod::initialize();
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std::unique_ptr<Animal> gracie(new Cow());
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std::unique_ptr<Animal> willy(new Wolf());
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std::cout << "cow meets wolf -> " << meet(*gracie, *willy) << "\n"; // run
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std::cout << "wolf meets cow -> " << meet(*willy, *gracie) << "\n"; // hunt
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std::unique_ptr<Animal> hobbes(make_tiger());
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std::cout << "cow meets tiger -> " << meet(*gracie, *hobbes) << "\n"; // run
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return 0;
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}
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// end::content[]
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