| 1 | // Copyright Louis Dionne 2013-2022 |
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| 2 | // Distributed under the Boost Software License, Version 1.0. |
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| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
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| 4 | |
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| 5 | #include <boost/hana/assert.hpp> |
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| 6 | #include <boost/hana/core/to.hpp> |
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| 7 | #include <boost/hana/core/when.hpp> |
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| 8 | |
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| 9 | #include <vector> |
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| 10 | namespace hana = boost::hana; |
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| 11 | |
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| 12 | |
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| 13 | namespace boost { namespace hana { |
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| 14 | template <typename To, typename From> |
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| 15 | struct to_impl<std::vector<To>, std::vector<From>, |
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| 16 | when<is_convertible<From, To>::value>> |
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| 17 | : embedding<is_embedded<From, To>::value> |
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| 18 | { |
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| 19 | static std::vector<To> apply(std::vector<From> const& xs) { |
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| 20 | std::vector<To> result; |
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| 21 | for (auto const& x: xs) |
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| 22 | result.push_back(to<To>(x)); |
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| 23 | return result; |
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| 24 | } |
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| 25 | }; |
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| 26 | }} |
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| 27 | |
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| 28 | int main() { |
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| 29 | BOOST_HANA_RUNTIME_CHECK( |
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| 30 | hana::to<std::vector<int>>(std::vector<float>{1.1, 2.2, 3.3}) |
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| 31 | == |
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| 32 | std::vector<int>{1, 2, 3} |
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| 33 | ); |
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| 34 | |
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| 35 | static_assert(!hana::is_embedded<std::vector<float>, std::vector<int>>{}, "" ); |
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| 36 | } |
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| 37 | |
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