diagnostic_message.h

/*********************************************************************************************************************************************/
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/*                                                                                                                                           */
/*  Copyright (c) SILVERCODERS Ltd, http://silvercoders.com                                                                                  */
/*  Project homepage: https://github.com/docwire/docwire                                                                                     */
/*                                                                                                                                           */
/*  SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-DocWire-Commercial                                                                  */
/*********************************************************************************************************************************************/
 
#ifndef DOCWIRE_DIAGNOSTIC_MESSAGE_H
#define DOCWIRE_DIAGNOSTIC_MESSAGE_H
 
#include "core_export.h"
#include <exception>
#include <string>
#include <typeinfo>
#include "error.h"
 
namespace docwire::errors
{

inline std::string diagnostic_message(const std::exception& e)
{
    auto quote = [](const std::string& s) { return "\"" + s + "\""; };
 
    std::string message;
    try
    {
        std::rethrow_if_nested(e);
    }
    catch (const std::exception& nested_ex)
    {
        message = diagnostic_message(nested_ex);
    }
    catch (...)
    {
        message = "Unknown error\n";
    }
 
    try
    {
        const errors::base& error = dynamic_cast<const errors::base&>(e);
        if (message.empty())
        {
            message += "Error: " + (error.context_count() > 0 ? quote(error.context_string(0)) : quote(e.what())) + "\n";
            message += "in " + std::string{error.location.function_name()} + "\n";
            message += "at " + std::string{error.location.file_name()} + ":" + std::to_string(error.location.line()) + "\n";
            for (size_t i = 1; i < error.context_count(); ++i)
            {
                message += "with context " + quote(error.context_string(i)) + "\n";
            }
        }
        else
        {
            message += "wrapping at: " + std::string{error.location.function_name()} + "\n";
            message += "at " + std::string{error.location.file_name()} + ":" + std::to_string(error.location.line()) + "\n";
            for (size_t i = 0; i < error.context_count(); ++i)
                message += "with context " + quote(error.context_string(i)) + "\n";
        }
    }
    catch (const std::bad_cast&)
    {
        message += "Error: " + quote(e.what()) + "\n";
        message += "No location information available\n";
    }
    return message;
}

inline std::string diagnostic_message(std::exception_ptr eptr)
{
    try
    {
        std::rethrow_exception(eptr);
    }
    catch(const std::exception& e)
    {
        return diagnostic_message(e);
    }
    catch (...)
    {
        return "Unknown error\n";
    }
}
 
} // namespace docwire::errors
 
#endif // DOCWIRE_DIAGNOSTIC_MESSAGE_H