Exception.h

// SPDX-License-Identifier: GPL-2.0-only
 
#pragma once
 
#include <sstream>
#include <stdexcept>
#include <string_view>
 
namespace SlHelpers {

class [[nodiscard("Exception must be thrown")]] RuntimeException {
public:
    RuntimeException() = default;
    RuntimeException(std::string_view str) { m_oss << str; }
 
    struct ThrowNow {};

    template <typename T>
    RuntimeException &operator<<(const T &msg) {
        m_oss << msg;
        return *this;
    }

    std::string str() const { return m_oss.str(); }

    auto getRE() const { return std::runtime_error(str()); }

    [[noreturn]] void raise() const { throw getRE(); }

    [[noreturn]] void operator<<(const ThrowNow &) { raise(); }
 
private:
    std::ostringstream m_oss;
};
 
inline constexpr RuntimeException::ThrowNow raise;
 
}