enduro2d/headers/3rdparty/flat.hpp/detail/is_sorted.hpp

/*******************************************************************************
 * This file is part of the "https://github.com/blackmatov/flat.hpp"
 * For conditions of distribution and use, see copyright notice in LICENSE.md
 * Copyright (C) 2019, by Matvey Cherevko (blackmatov@gmail.com)
 ******************************************************************************/

#pragma once

namespace flat_hpp::detail
{
    template < typename Iter, typename Compare >
    bool is_sorted(Iter first, Iter last, Compare comp) {
        if ( first != last ) {
            Iter next = first;
            while ( ++next != last ) {
                if ( comp(*next, *first) ) {
                    return false;
                }
                ++first;
            }
        }
        return true;
    }

    template < typename Iter, typename Compare >
    bool is_sorted_unique(Iter first, Iter last, Compare comp) {
        if ( first != last ){
            Iter next = first;
            while ( ++next != last ) {
                if ( !comp(*first, *next) ) {
                    return false;
                }
                ++first;
            }
        }
        return true;
    }
}