cancellation_exception.h

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// BSD 3-Clause License
// Copyright (c) 2024, 🍀☀🌕🌥 🌊
// See the LICENSE file in the project root for full license information.
 
#pragma once
 
#include "cancellation_reason.h"
 
#include <exception>
#include <string>
 
namespace kcenon::thread
{
    class operation_cancelled_exception : public std::exception
    {
    public:
        explicit operation_cancelled_exception(cancellation_reason reason)
            : reason_(std::move(reason))
        {
            message_ = "Operation cancelled";
            if (!reason_.message.empty())
            {
                message_ += ": " + reason_.message;
            }
            else
            {
                message_ +=
                    " (" + cancellation_reason::type_to_string(reason_.reason_type) + ")";
            }
        }
 
        [[nodiscard]] auto what() const noexcept -> const char* override
        {
            return message_.c_str();
        }
 
        [[nodiscard]] auto reason() const noexcept -> const cancellation_reason&
        {
            return reason_;
        }
 
    private:
        cancellation_reason reason_;
        std::string message_;
    };
 
} // namespace kcenon::thread