StringMap.hpp

// SPDX-FileCopyrightText: 2025 Vincent Leroy
// SPDX-License-Identifier: MIT
//
// This file is part of dfx.
//
// Licensed under the MIT License. See the LICENSE file in the project root
// for full license information.
 
#pragma once
 
// Standard includes
#include <map>
#include <memory>
#include <string_view>
#include <unordered_map>
#include <utility>
 
namespace dfx::Utils
{
struct TransparentHash
{
    using is_transparent = void;

    std::size_t operator()(std::string_view str) const noexcept
    { return std::hash<std::string_view>{}(str); }
};

struct TransparentEqual
{
    using is_transparent = void;

    bool operator()(std::string_view lhs, std::string_view rhs) const noexcept
    { return lhs == rhs; }
};

using TransparentLess = std::less<>;

template<typename T, typename Allocator = std::allocator<std::pair<std::string const, T>>>
using UnorderedStringMap = std::unordered_map<std::string, T, TransparentHash, TransparentEqual, Allocator>;

template<typename T, typename Allocator = std::allocator<std::pair<std::string const, T>>>
using StringMap = std::map<std::string, T, TransparentLess, Allocator>;
} // !namespace dfx::Utils