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[view] Add tests for modifying the elements of a view
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6 files changed

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6 files changed

+195
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‎include/boost/hana/view.hpp‎

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@@ -349,7 +349,14 @@ BOOST_HANA_NAMESPACE_BEGIN
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// single_view
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template <typename T, typename N>
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static constexpr decltype(auto) apply(detail::single_view_t<T> view, N const&) {
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static constexpr T& apply(detail::single_view_t<T>& view, N const&) {
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static_assert(N::value == 0,
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"trying to fetch an out-of-bounds element in a hana::single_view");
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return view.value_;
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}
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template <typename T, typename N>
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static constexpr T const& apply(detail::single_view_t<T> const& view, N const&) {
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static_assert(N::value == 0,
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"trying to fetch an out-of-bounds element in a hana::single_view");
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return view.value_;

‎test/view/flattened/modifications.cpp‎

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// Copyright Louis Dionne 2013-2016
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/at.hpp>
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#include <boost/hana/view.hpp>
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#include <support/seq.hpp>
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namespace hana = boost::hana;
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int main() {
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auto container = ::seq;
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auto storage = container(container(0, 1, 2),
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container(3, 4),
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container(),
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container(5));
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auto view = hana::detail::flattened(storage);
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hana::at_c<0>(view) = 90;
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hana::at_c<1>(view) = 91;
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hana::at_c<2>(view) = 92;
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hana::at_c<3>(view) = 93;
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hana::at_c<4>(view) = 94;
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hana::at_c<5>(view) = 95;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<3>(view) == 93);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<4>(view) == 94);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<5>(view) == 95);
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auto& storage1 = hana::at_c<0>(storage);
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auto& storage2 = hana::at_c<1>(storage);
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auto& storage4 = hana::at_c<3>(storage);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage1) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage1) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage1) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage2) == 93);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage2) == 94);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage4) == 95);
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}

‎test/view/identity/modifications.cpp‎

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// Copyright Louis Dionne 2013-2016
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/at.hpp>
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#include <boost/hana/view.hpp>
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#include <support/seq.hpp>
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namespace hana = boost::hana;
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int main() {
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auto container = ::seq;
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auto storage = container(0, 1, 2);
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auto view = hana::detail::identity_view(storage);
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hana::at_c<0>(view) = 90;
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hana::at_c<1>(view) = 91;
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hana::at_c<2>(view) = 92;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 92);
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}

‎test/view/joined/modifications.cpp‎

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// Copyright Louis Dionne 2013-2016
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/at.hpp>
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#include <boost/hana/view.hpp>
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#include <support/seq.hpp>
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namespace hana = boost::hana;
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int main() {
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auto container = ::seq;
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auto storage1 = container(0, 1, 2);
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auto storage2 = container(3, 4);
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auto view = hana::detail::joined(storage1, storage2);
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hana::at_c<0>(view) = 90;
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hana::at_c<1>(view) = 91;
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hana::at_c<2>(view) = 92;
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hana::at_c<3>(view) = 93;
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hana::at_c<4>(view) = 94;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<3>(view) == 93);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<4>(view) == 94);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage1) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage1) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage1) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage2) == 93);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage2) == 94);
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}

‎test/view/single/modifications.cpp‎

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// Copyright Louis Dionne 2013-2016
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/at.hpp>
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#include <boost/hana/view.hpp>
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namespace hana = boost::hana;
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int main() {
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auto view = hana::detail::single_view(3);
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hana::at_c<0>(view) = 93;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 93);
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}

‎test/view/sliced/modifications.cpp‎

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// Copyright Louis Dionne 2013-2016
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/at.hpp>
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#include <boost/hana/range.hpp>
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#include <boost/hana/view.hpp>
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#include <support/seq.hpp>
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#include <cstddef>
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namespace hana = boost::hana;
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int main() {
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auto container = ::seq;
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{
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auto storage = container(0, 1, 2);
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auto view = hana::detail::sliced(storage, hana::range_c<std::size_t, 0, 3>);
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hana::at_c<0>(view) = 90;
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hana::at_c<1>(view) = 91;
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hana::at_c<2>(view) = 92;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 92);
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}
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{
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auto storage = container(0, 1, 2);
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auto view = hana::detail::sliced(storage, hana::range_c<std::size_t, 0, 2>);
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hana::at_c<0>(view) = 90;
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hana::at_c<1>(view) = 91;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 90);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 02);
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}
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{
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auto storage = container(7, 1, 2);
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auto view = hana::detail::sliced(storage, hana::range_c<std::size_t, 1, 3>);
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hana::at_c<0>(view) = 91;
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hana::at_c<1>(view) = 92;
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 92);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 07);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
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BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 92);
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}
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}

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