isAssociativeContainer.hpp

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// Copyright (c) 2020-2025 Cody R. Drisko. All rights reserved.
// Licensed under the MIT License. See the LICENSE file in the project root for more information.
//
// Name: isAssociativeContainer.hpp
// Author: crdrisko
// Date: 09/23/2020-07:42:36
// Description: A type trait for determining whether a type T meets the requirements of an associative container
 
#ifndef DRYCHEM_COMMON_UTILITIES_INCLUDE_COMMON_UTILS_META_TRAITS_CONTAINERTRAITS_ISASSOCIATIVECONTAINER_HPP
#define DRYCHEM_COMMON_UTILITIES_INCLUDE_COMMON_UTILS_META_TRAITS_CONTAINERTRAITS_ISASSOCIATIVECONTAINER_HPP
 
#include <type_traits>
#include <utility>
 
#include "common-utils/meta/traits/containerTraits/isContainer.hpp"
 
namespace CppUtils::Meta
{
    template<typename, typename = std::void_t<>>
    struct is_associative_container : std::false_type
    {
    };

    template<typename T>
    struct is_associative_container<T, std::void_t<typename T::key_type,
                                                   typename T::key_compare,
                                                   typename T::value_compare,
                                                   decltype(std::declval<T>().key_comp()),
                                                   decltype(std::declval<T>().value_comp())>> : is_container<T>
    {
    };

    template<typename T>
    constexpr bool is_associative_container_v = is_associative_container<T>::value;
}   // namespace CppUtils::Meta
 
#endif