operator[] of the Settings module.

Settings.cpp

// In the CSettings.hpp class definition:
std::map<
#ifndef _DEBUG
    uint32_t,
#else
    string_t,
#endif // _DEBUG
    COption> m_Options;

COption& CSettings::operator[](const string_t& opt)
{
    // Search via hash with release builds.
#ifndef _DEBUG
    uint32_t hash = util::string_hash(opt);
#else
    const string_t& hash = opt;
#endif // _DEBUG

    // Search for an existing option
    auto iter = m_Options.find(hash);
    
    // Not found?
    if(iter == m_Options.end())
    {
        // Create a new blank option and return it
        m_Options[hash] = COption();
        return m_Options[hash];
    }
    
    return iter->second;
}