Maddie Slockbower
366774622b
- Updated License to GPL v3.0 - Added New Math Nodes - Prototype Rendering Code for Debugging Functions
127 lines
4.2 KiB
C++
127 lines
4.2 KiB
C++
// =====================================================================================================================
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// open-cpp-utils, an open-source cpp library with data structures that extend the STL.
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// Copyright (C) 2024 Medusa Slockbower
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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// =====================================================================================================================
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#ifndef OPEN_CPP_UTILS_ANY_H
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#define OPEN_CPP_UTILS_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<T, 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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template<typename V>
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any& operator=(const V& v)
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{
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static_assert(std::disjunction<std::is_same<V, T>, std::is_same<V, Rest>...>{});
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static_cast<V&>(*this) = v;
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return *this;
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}
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template<typename V>
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any& operator=(V&& v)
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{
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static_assert(std::disjunction<std::is_same<V, T>, std::is_same<V, Rest>...>{});
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static_cast<V&>(*this) = v;
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return *this;
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}
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// Access --------------------------------------------------------------------------------------------------------------
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template<typename V>
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V& get()
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{
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static_assert(std::disjunction<std::is_same<V, T>, std::is_same<V, Rest>...>{});
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return static_cast<V&>(*this);
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}
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template<typename V>
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const V& get() const
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{
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static_assert(std::disjunction<std::is_same<V, T>, std::is_same<V, Rest>...>{});
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return static_cast<const V&>(*this);
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}
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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 // OPEN_CPP_UTILS_ANY_H
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