unorderedmap.hpp

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/*------------------------------------------------------------------------------
    Copyright Butterfly Energy Systems 2014-2015, 2022.
    Distributed under the Boost Software License, Version 1.0.
    http://www.boost.org/LICENSE_1_0.txt
------------------------------------------------------------------------------*/
 
#ifndef CPPWAMP_TYPES_UNORDEREDMAP_HPP
#define CPPWAMP_TYPES_UNORDEREDMAP_HPP
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
 
#include <unordered_map>
#include <utility>
#include "../api.hpp"
#include "../error.hpp"
#include "../variant.hpp"
 
namespace wamp
{
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
template <typename T>
void CPPWAMP_API convert(FromVariantConverter& conv,
                         std::unordered_map<String, T>& map)
{
    const auto& variant = conv.variant();
    if (!variant.is<Object>())
    {
        throw error::Conversion("Attempting to convert non-object variant "
                                "to std::unordered_map");
    }
 
    std::unordered_map<String, T> newMap;
    for (const auto& kv: variant.as<Object>())
    {
        try
        {
            newMap.emplace(kv.first, kv.second.to<T>());
        }
        catch (const error::Conversion& e)
        {
            std::string msg = e.what();
            msg += " (for variant member \"" + kv.first + "\")";
            throw error::Conversion(msg);
        }
    }
    map = std::move(newMap);
}
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
template <typename T>
void CPPWAMP_API convert(ToVariantConverter& conv,
                         std::unordered_map<String, T>& map)
{
    Object obj;
    for (const auto& kv: map)
    {
        obj.emplace(kv.first, Variant::from(kv.second));
    }
    conv.variant() = std::move(obj);
}
 
 
}
 
#endif // CPPWAMP_TYPES_UNORDEREDMAP_HPP