add any type

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.5)
 include(cmake/color.cmake)
 
-set(BLT_VERSION 0.14.15)
+set(BLT_VERSION 0.15.0)
 set(BLT_TEST_VERSION 0.0.1)
 
 set(BLT_TARGET BLT)

include/blt/std/any.h

@@ -0,0 +1,199 @@
+#pragma once
+/*
+ *  Copyright (C) 2024  Brett Terpstra
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <cstring>
+#ifndef BLT_ANY_H
+#define BLT_ANY_H
+
+#include <any>
+#include <blt/std/types.h>
+
+namespace blt::unsafe
+{
+    class any_t_union
+    {
+        private:
+            static constexpr auto SIZE = sizeof(std::any);
+            
+            union variant_t
+            {
+                constexpr variant_t()
+                {}
+                
+                blt::u8 data[SIZE]{};
+                std::any any;
+                
+                ~variant_t()
+                {}
+            };
+            
+            variant_t variant;
+            bool has_any = false;
+        public:
+            any_t_union() = default;
+            
+            any_t_union(const any_t_union& copy)
+            {
+                if (copy.has_any)
+                {
+                    variant.any = copy.variant.any;
+                    has_any = true;
+                } else
+                {
+                    std::memcpy(variant.data, copy.variant.data, SIZE);
+                }
+            }
+            
+            any_t_union(any_t_union&& move) noexcept
+            {
+                if (move.has_any)
+                {
+                    variant.any = std::move(move.variant.any);
+                    has_any = true;
+                } else
+                {
+                    std::memcpy(variant.data, move.variant.data, SIZE);
+                }
+            }
+            
+            ~any_t_union()
+            {
+                if (has_any)
+                    variant.any.~any();
+            }
+            
+            template<typename T>
+            any_t_union(T t)
+            {
+                if constexpr (sizeof(T) <= SIZE && std::is_trivially_copyable_v<T>)
+                {
+                    std::memcpy(variant.data, &t, sizeof(t));
+                } else
+                {
+                    variant.any = t;
+                    has_any = true;
+                }
+            }
+            
+            any_t_union& operator=(const any_t_union& copy)
+            {
+                if (has_any)
+                    variant.any.~any();
+                if (copy.has_any)
+                {
+                    std::memset(variant.data, 0, SIZE);
+                    variant.any = copy.variant.any;
+                    has_any = true;
+                } else
+                {
+                    std::memcpy(variant.data, copy.variant.data, SIZE);
+                    has_any = false;
+                }
+                return *this;
+            }
+            
+            any_t_union& operator=(any_t_union&& move) noexcept
+            {
+                if (has_any)
+                    variant.any.~any();
+                if (move.has_any)
+                {
+                    std::memset(variant.data, 0, SIZE);
+                    variant.any = std::move(move.variant.any);
+                    has_any = true;
+                } else
+                {
+                    std::memcpy(variant.data, move.variant.data, SIZE);
+                    has_any = false;
+                }
+                return *this;
+            }
+            
+            template<typename T>
+            any_t_union& operator=(T t)
+            {
+                if (has_any)
+                    variant.any.~any();
+                if constexpr (sizeof(T) <= SIZE && std::is_trivially_copyable_v<T>)
+                {
+                    std::memcpy(variant.data, &t, sizeof(t));
+                    has_any = false;
+                } else
+                {
+                    std::memset(variant.data, 0, SIZE);
+                    variant.any = std::move(t);
+                    has_any = true;
+                }
+                return *this;
+            }
+            
+            template<typename T>
+            T any_cast()
+            {
+                if constexpr (sizeof(T) <= SIZE && std::is_trivially_copyable_v<T>)
+                {
+                    if (!has_any)
+                    {
+                        T t;
+                        std::memcpy(&t, variant.data, sizeof(T));
+                        return t;
+                    }
+                }
+                return std::any_cast<T>(variant.any);
+            }
+    };
+    
+    template<blt::size_t SIZE>
+    class any_t_base
+    {
+        private:
+            blt::u8 data[SIZE]{};
+        public:
+            any_t_base() = default;
+            
+            template<typename T>
+            any_t_base(T t)
+            {
+                static_assert(std::is_trivially_copyable_v<T> && "Type must be byte copyable");
+                static_assert(sizeof(T) <= SIZE && "Size must be less than or equal to internal buffer");
+                std::memcpy(data, &t, sizeof(t));
+            }
+            
+            template<typename T>
+            any_t_base& operator=(T t)
+            {
+                static_assert(std::is_trivially_copyable_v<T> && "Type must be byte copyable");
+                static_assert(sizeof(T) <= SIZE && "Size must be less than or equal to internal buffer");
+                std::memcpy(data, &t, sizeof(t));
+            }
+            
+            template<typename T>
+            T any_cast()
+            {
+                static_assert(std::is_trivially_copyable_v<T> && "Type must be byte copyable");
+                static_assert(sizeof(T) <= SIZE && "Size must be less than or equal to internal buffer");
+                T t;
+                std::memcpy(&t, data, sizeof(T));
+                return t;
+            }
+    };
+    
+    using any_t = any_t_base<8>;
+}
+
+#endif //BLT_ANY_H