65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
/**
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BSD 3-Clause License
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This file is part of the Basalt project.
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https://gitlab.com/VladyslavUsenko/basalt.git
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Copyright (c) 2021, Vladyslav Usenko and Nikolaus Demmel.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <type_traits>
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namespace basalt {
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template <class I>
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typename std::make_signed_t<I> signed_cast(I v) {
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static_assert(std::is_unsigned_v<I>, "no unsigned");
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return static_cast<typename std::make_signed_t<I>>(v);
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}
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template <class I>
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typename std::make_unsigned_t<I> unsigned_cast(I v) {
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static_assert(std::is_signed_v<I>, "no signed");
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return static_cast<typename std::make_unsigned_t<I>>(v);
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}
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// copy-assign map while casting Scalar type of values
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template <class M1, class M2>
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void assign_cast_map_values(M1& a, const M2& b) {
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using Scalar = typename M1::mapped_type::Scalar;
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a.clear();
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for (const auto& [k, v] : b) {
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a.try_emplace(k, v.template cast<Scalar>());
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}
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}
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} // namespace basalt
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