font_grapheme_id.hpp

// Copyright Take Vos 2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "font_id.hpp"
#include "grapheme.hpp"
#include "../hash.hpp"
 
namespace tt {
 
struct font_grapheme_id {
    font_id font_id;
    grapheme g;
 
    [[nodiscard]] size_t hash() const noexcept {
        return hash_mix(font_id, g);
    }
 
    [[nodiscard]] friend bool operator==(font_grapheme_id const &lhs, font_grapheme_id const &rhs) noexcept {
        return (lhs.font_id == rhs.font_id) && (lhs.g == rhs.g);
    }
};
 
}
 
namespace std {
 
template<>
struct hash<tt::font_grapheme_id> {
    [[nodiscard]] size_t operator() (tt::font_grapheme_id const &rhs) const noexcept {
        return rhs.hash();
    }
};
 
}