FontGraphemeID.hpp

// Copyright 2020 Pokitec
// All rights reserved.
 
#pragma once
 
#include "TTauri/Foundation/hash.hpp"
#include "TTauri/Text/FontID.hpp"
#include "TTauri/Text/Grapheme.hpp"
 
namespace tt {
 
struct FontGraphemeID {
    FontID font_id;
    Grapheme g;
 
    [[nodiscard]] size_t hash() const noexcept {
        return hash_mix(font_id, g);
    }
 
    [[nodiscard]] friend bool operator==(FontGraphemeID const &lhs, FontGraphemeID const &rhs) noexcept {
        return (lhs.font_id == rhs.font_id) && (lhs.g == rhs.g);
    }
};
 
}
 
namespace std {
 
template<>
struct hash<tt::FontGraphemeID> {
    [[nodiscard]] size_t operator() (tt::FontGraphemeID const &rhs) const noexcept {
        return rhs.hash();
    }
};
 
}