43 lines
910 B
C++
43 lines
910 B
C++
// Copyright (C) 2016-2018 T. Zachary Laine
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//
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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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#include <boost/yap/algorithm.hpp>
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#include <array>
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#include <iostream>
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//[ minimal_template
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template <boost::yap::expr_kind Kind, typename Tuple>
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struct minimal_expr
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{
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static const boost::yap::expr_kind kind = Kind;
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Tuple elements;
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};
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//]
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int main()
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{
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//[ minimal_template_manual_construction
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auto left = boost::yap::make_terminal<minimal_expr>(1);
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auto right = boost::yap::make_terminal<minimal_expr>(41);
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auto expr = boost::yap::make_expression<
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minimal_expr,
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boost::yap::expr_kind::plus
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>(left, right);
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//]
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//[ minimal_template_evaluation
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auto result = boost::yap::evaluate(expr);
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std::cout << result << "\n"; // prints "42"
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//]
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return 0;
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}
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