91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
// =====================================================================================================================
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// Copyright 2024 Medusa Slockbower
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// =====================================================================================================================
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#ifndef ANY_H
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#define ANY_H
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#include "template_utils.h"
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namespace open_cpp_utils
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{
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/**
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* \brief Wrapper for a value with multiple types
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* \tparam Ts Types to include, must be unique
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*/
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template<typename...Ts> class any;
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template<> class any<> { };
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template<typename T, typename...Rest>
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class any<T, Rest...> : public any<Rest...>
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{
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// Assertions ==========================================================================================================
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static_assert(is_unique<Rest...>);
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// Typedefs ============================================================================================================
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public:
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using base_type = any<Rest...>;
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using this_type = T;
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using reference = T&;
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using const_reference = const T&;
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using pointer = T*;
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using const_pointer = const T*;
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// Constructors ========================================================================================================
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public:
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any() : base_type() , Value() { }
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any(const this_type& value, const Rest&...other) : base_type(other...), Value(value) { }
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any(this_type&& value, Rest&&...other) : base_type(other...), Value(value) { }
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any(const any& other) = default;
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any(any&& other) = default;
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~any() = default;
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// Operators ===========================================================================================================
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public:
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// Assignment operators ------------------------------------------------------------------------------------------------
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any& operator=(const any&) = default;
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any& operator=(any&&) = default;
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// Cast operators ------------------------------------------------------------------------------------------------------
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operator reference() { return Value; }
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operator const_reference() const { return Value; }
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operator pointer() { return &Value; }
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operator const_pointer() const { return &Value; }
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// Variables ===========================================================================================================
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private:
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static constexpr size_t Size = sizeof...(Rest);
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this_type Value;
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};
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}
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#endif //ANY_H
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