assert.hpp

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//
// libcppwrap - A collection of C++ wrappers for native APIs
// Copyright (C) 2021-2023 David A. Norris <danorris@gmail.com>
// Published under the MIT license - https://opensource.org/licenses/MIT
//
 
#pragma once
 
#include <cerrno>
#include <system_error>
 
namespace w
{
    template <typename T>
    T throw_if_eq(T value, T x, const char *message)
    {
        if (value == x)
            throw std::system_error(errno, std::generic_category(), message);
        return value;
    }
 
    template <typename T>
    T throw_if_lt(T value, T x, const char *message)
    {
        if (value < x)
            throw std::system_error(errno, std::generic_category(), message);
        return value;
    }
 
    template <typename T>
    T throw_if_ne(T value, T x, const char *message)
    {
        if (value != x)
            throw std::system_error(errno, std::generic_category(), message);
        return value;
    }
 
    template <typename T>
    T throw_if_nz(T value, const char *message)
    {
        if (value != 0)
            throw std::system_error(errno, std::generic_category(), message);
        return value;
    }
 
    template <typename T>
    T throw_if_z(T value, const char *message)
    {
        if (value == 0)
            throw std::system_error(errno, std::generic_category(), message);
        return value;
    }
}