mapping.hpp

/*
    SPDX-License-Identifier: MIT
    Copyright © 2023-2024 Amebis
*/
 
#pragma once
 
#include "compat.hpp"
#include <vector>
 
namespace stdex
{
    template <class T>
    struct mapping {
        T from; // index in source string
        T to;   // index in destination string
 
        mapping() : from(0), to(0) {}
 
        mapping(_In_ T x) : from(x), to(x) {}
 
        mapping(_In_ T _from, _In_ T _to) : from(_from), to(_to) {}
 
        bool operator==(const mapping& other) const { return from == other.from && to == other.to; }
 
        bool operator!=(const mapping& other) const { return !operator==(other); }
 
        mapping operator+(_In_ const mapping& other) const
        {
            return mapping(from + other.from, to + other.to);
        }
    };
 
    template <class T, class AX = std::allocator<mapping<T>>>
    using mapping_vector = std::vector<mapping<T>, AX>;
}