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Diffstat (limited to 'support/Cast.h')
-rw-r--r-- | support/Cast.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/support/Cast.h b/support/Cast.h new file mode 100644 index 0000000000..53d5f68065 --- /dev/null +++ b/support/Cast.h @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2018-2020 Arm Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef ARM_COMPUTE_MISC_CAST_H +#define ARM_COMPUTE_MISC_CAST_H + +#include "arm_compute/core/Error.h" + +namespace arm_compute +{ +namespace utils +{ +namespace cast +{ +/** Polymorphic cast between two types + * + * @warning Will throw an exception if cast cannot take place + * + * @tparam Target Target to cast type + * @tparam Source Source from cast type + * + * @param[in] v Value to cast + * + * @return The casted value + */ +template <typename Target, typename Source> +inline Target polymorphic_cast(Source *v) +{ + if(dynamic_cast<Target>(v) == nullptr) + { + ARM_COMPUTE_THROW(std::bad_cast()); + } + return static_cast<Target>(v); +} + +/** Polymorphic down cast between two types + * + * @warning Will assert if cannot take place + * + * @tparam Target Target to cast type + * @tparam Source Source from cast type + * + * @param[in] v Value to cast + * + * @return The casted value + */ +template <typename Target, typename Source> +inline Target polymorphic_downcast(Source *v) +{ + ARM_COMPUTE_ERROR_ON(dynamic_cast<Target>(v) != static_cast<Target>(v)); + return static_cast<Target>(v); +} + +/** Polymorphic cast between two unique pointer types + * + * @warning Will throw an exception if cast cannot take place + * + * @tparam Target Target to cast type + * @tparam Source Source from cast type + * @tparam Deleter Deleter function type + * + * @param[in] v Value to cast + * + * @return The casted value + */ +template <typename Target, typename Source, typename Deleter> +std::unique_ptr<Target, Deleter> polymorphic_cast_unique_ptr(std::unique_ptr<Source, Deleter> &&v) +{ + if(dynamic_cast<Target *>(v.get()) == nullptr) + { + ARM_COMPUTE_THROW(std::bad_cast()); + } + auto r = static_cast<Target *>(v.release()); + return std::unique_ptr<Target, Deleter>(r, std::move(v.get_deleter())); +} + +/** Polymorphic down cast between two unique pointer types + * + * @warning Will assert if cannot take place + * + * @tparam Target Target to cast type + * @tparam Source Source from cast type + * @tparam Deleter Deleter function type + * + * @param[in] v Value to cast + * + * @return The casted value + */ +template <typename Target, typename Source, typename Deleter> +std::unique_ptr<Target, Deleter> polymorphic_downcast_unique_ptr(std::unique_ptr<Source, Deleter> &&v) +{ + ARM_COMPUTE_ERROR_ON(dynamic_cast<Target *>(v.get()) != static_cast<Target *>(v.get())); + auto r = static_cast<Target *>(v.release()); + return std::unique_ptr<Target, Deleter>(r, std::move(v.get_deleter())); +} +} // namespace cast +} // namespace utils +} // namespace arm_compute +#endif /* ARM_COMPUTE_MISC_CAST_H */ |