Implements namespace statement.

src/Utils/MemoryPool.hpp

@@ -0,0 +1,49 @@
+#ifndef MALACHSCRIPT_MEMORYPOOL_HPP
+#define MALACHSCRIPT_MEMORYPOOL_HPP
+
+#include <cstddef>
+#include <cstdint>
+#include <stdexcept>
+
+namespace MalachScript::Utils {
+    template <size_t initialSize, size_t steps>
+    class MemoryPool {
+    public:
+        MemoryPool() : _offset(0), _capacity(initialSize) {
+            auto *ptr = malloc(_capacity);
+            if (ptr == nullptr) {
+                throw std::logic_error("Out of memory.");
+            }
+            _memory = static_cast<uint8_t*>(ptr);
+        }
+
+        ~MemoryPool(){
+            free(_memory);
+        }
+
+        template <class T, class... parameters> T* Create(parameters... args){
+            if (_offset + sizeof(T) >= _capacity) {
+                IncreaseStep();
+            }
+            auto* element = new (_memory + _offset) T(args...);
+            _offset += sizeof(T);
+            return element;
+        }
+
+    private:
+        size_t _offset;
+        size_t _capacity;
+        uint8_t* _memory = nullptr;
+
+        void IncreaseStep(){
+            _capacity += steps;
+            auto newPtr = realloc(_memory, _capacity);
+            if (newPtr == nullptr) {
+                throw std::logic_error("Out of memory.");
+            }
+            _memory = static_cast<uint8_t*>(newPtr);
+        }
+    };
+}
+
+#endif // MALACHSCRIPT_MEMORYPOOL_HPP