61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
/*=============================================================================
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Copyright (c) 2017 Nikita Kniazev
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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 copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#include <boost/phoenix/core.hpp>
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#include <boost/phoenix/object.hpp>
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#include <boost/phoenix/scope.hpp>
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#include <boost/phoenix/operator.hpp>
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#include <string>
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#include <iostream>
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template <typename T, std::size_t N>
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struct array_holder
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{
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typedef T underlying_type[N];
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array_holder(underlying_type const& x)
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{
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for (std::size_t i = 0; i < N; ++i) elems_[i] = x[i];
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}
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T elems_[N];
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friend std::ostream& operator<<(std::ostream& os, array_holder const& x)
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{
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os << x.elems_[0];
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for (std::size_t i = 1; i < N; ++i) os << ", " << x.elems_[i];
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return os;
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}
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};
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int main()
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{
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using boost::phoenix::construct;
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using boost::phoenix::let;
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using boost::phoenix::arg_names::_1;
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using boost::phoenix::local_names::_a;
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let(_a = construct<std::string>("str"))
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[
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std::cout << _a << std::endl
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]();
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let(_a = construct<array_holder<char, 4> >("str"))
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[
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std::cout << _a << std::endl
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]();
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int ints[] = { 1, 2, 3 };
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let(_a = construct<array_holder<int, sizeof(ints) / sizeof(ints[0])> >(ints) )
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[
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std::cout << _a << std::endl
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]();
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return 0;
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}
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