73ef4ff3
 Hu Chunming
提交三方库
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// Copyright (C) 2016-2018 T. Zachary Laine
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <boost/yap/algorithm.hpp>
#include <array>
#include <iostream>
//[ minimal_template
template <boost::yap::expr_kind Kind, typename Tuple>
struct minimal_expr
{
static const boost::yap::expr_kind kind = Kind;
Tuple elements;
};
//]
int main()
{
//[ minimal_template_manual_construction
auto left = boost::yap::make_terminal<minimal_expr>(1);
auto right = boost::yap::make_terminal<minimal_expr>(41);
auto expr = boost::yap::make_expression<
minimal_expr,
boost::yap::expr_kind::plus
>(left, right);
//]
//[ minimal_template_evaluation
auto result = boost::yap::evaluate(expr);
std::cout << result << "\n"; // prints "42"
//]
return 0;
}
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