unorderedset.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_UNORDEREDSET_HPP
#define CPPWAMP_TYPES_UNORDEREDSET_HPP
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
 
#include <unordered_set>
#include "../api.hpp"
#include "../error.hpp"
#include "../variant.hpp"
 
namespace wamp
{
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
template <typename T>
CPPWAMP_API void convert(FromVariantConverter& conv, std::unordered_set<T>& set)
{
    const auto& variant = conv.variant();
    if (!variant.is<Array>())
    {
        throw error::Conversion("Attempting to convert non-array variant "
                                "to std::unordered_set");
    }
 
    std::unordered_set<T> newSet;
    const auto& array = variant.as<Array>();
    for (Array::size_type i=0; i<array.size(); ++i)
    {
        try
        {
            newSet.emplace(array[i].to<T>());
        }
        catch (const error::Conversion& e)
        {
            std::string msg = e.what();
            msg += " (for element #" + std::to_string(i) + ")";
            throw error::Conversion(msg);
        }
    }
    set = std::move(newSet);
}
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
template <typename T>
CPPWAMP_API void convert(ToVariantConverter& conv, std::unordered_set<T>& set)
{
    Array array;
    for (const auto& elem: set)
    {
        array.emplace_back(Variant::from(elem));
    }
    conv.variant() = std::move(array);
}
 
} // namespace wamp
 
#endif // CPPWAMP_TYPES_UNORDEREDSET_HPP