bool TurnContext::selectCard(const Interface::CardSelection& options, bool optional)
{
    if(!optional && options.empty())
        throw Exception::LogicError("options cannot be empty if optional is false");
    if(options.empty())
        return false;
    if(options.size() == 1 && !optional){
        options.toggle(0);
        return true;
    }
    self.selectCard(*this, options);//(const TurnContext&, const Interface::CardSelection&, bool = true)  = 0;
    if(!optional && options.countSelected() != 1)
        throw Exception::RuntimeError("!optional && options.countSelected() != 1");
    return true;//something above is surely wrong
}

size_t TurnContext::selectCards(const Interface::CardSelection& options, size_t min, size_t max)
{
    if(!options.validate())
        throw Exception::LogicError("!options.validate()");
    if(options.empty()){
        min = max = 0;
        return 0;
    }
    min = 1;
    max = options.size();
    self.selectCards(*this, options, min, max);//(,, size_t min = 0, size_t max = -1)
    if(options.countSelected() == 0)
        throw Exception::RuntimeError("the player selection is invalid");
    return options.countSelected();
}