swap function is error

[opencnnet]

/// swaps the contents
void swap(fifo_map& other)
{
    std::swap(m_map, other.m_map);
    std::swap(m_compare, other.m_compare);
    std::swap(m_keys, other.m_keys);
}

m_compare‘s member m_key point to m_map's m_key

[danielharvey458]

The use the of the compiler-provided copy-assignment operator is also incorrect.

[nlohmann]

Thanks for reporting. This project is currently unmaintained in favor of https://github.com/nlohmann/json/blob/develop/include/nlohmann/ordered_map.hpp which has the same functionality.