StorageComponent.hpp

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// -------------------------------------------------------//
//
// SHAMROCK code for hydrodynamics
// Copyright (c) 2021-2026 Timothée David--Cléris <tim.shamrock@proton.me>
// SPDX-License-Identifier: CeCILL Free Software License Agreement v2.1
// Shamrock is licensed under the CeCILL 2.1 License, see LICENSE for more information
//
// -------------------------------------------------------//
 
#pragma once
 
#include "shambase/SourceLocation.hpp"
#include "shambase/memory.hpp"
#include "shambase/stacktrace.hpp"
 
namespace shambase {
 
    template<class T>
    class StorageComponent {
        private:
        std::unique_ptr<T> hndl;
 
        public:
        void set(T &&arg, SourceLocation loc = SourceLocation()) {
            StackEntry stack_loc{};
            if (bool(hndl)) {
                throw shambase::make_except_with_loc<std::runtime_error>(
                    "please reset the storage component before", loc);
            }
            hndl = std::make_unique<T>(std::forward<T>(arg));
        }
 
        T &get(SourceLocation loc = SourceLocation()) {
            StackEntry stack_loc{};
            return shambase::get_check_ref(hndl, loc);
        }
 
        void reset() {
            StackEntry stack_loc{};
            hndl.reset();
        }
        bool is_empty() { return !bool(hndl); }
    };
 
} // namespace shambase