RoutingMap.h

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#pragma once
#include <type_traits>
#include <utility>
#include <vector>
 
namespace Simulators::Private
{
// Keep Maestro buildable with older QCSim releases. Without an authoritative
// map, use the native local optimizer instead of a possibly stale mirror.
template <class T, class = void> struct HasRoutingMap : std::false_type
{
};
 
template <class T> struct HasRoutingMap<T, std::void_t<decltype(std::declval<const T &>().getQubitsMap())>> : std::true_type
{
};
 
template <class T> std::vector<long long> ReadRoutingMap(const T *simulator)
{
    if constexpr (HasRoutingMap<T>::value)
    {
        if (simulator)
        {
            const auto &map = simulator->getQubitsMap();
            return {map.begin(), map.end()};
        }
    }
    return {};
}
} // namespace Simulators::Private