MiiNiPaa

std::string arr[] = {"123", "abc", "@$%"};
std::string str = "Hello";
        while (s_arr[i] < x) i++;
        while (s_arr[j] > x) j--;

#include <iostream>
#include <type_traits>
#include <typeinfo>

template <typename T>
class GenericQueueBase
{
	//Общий интерфейс очереди (для рантайм полиморфизма)
};

template <typename T>
class Queue_pass : public GenericQueueBase<T>
{
    static_assert(sizeof(T) <= 4, "types up to 4 bytes are allowed");
    //Реализация очереди
};

template <typename T>
class Pool_pass : public GenericQueueBase<T>
{
    //Реализация пула
};


template<typename T>
using GenericQueue = typename std::conditional<sizeof(T) <= 4, Queue_pass<T>, Pool_pass<T>>::type;

int main()
{
	std::cout << typeid(GenericQueue<int>).name() << '\n' << typeid(GenericQueue<double>).name();
}

#include <iostream>
#include <type_traits>

template <typename T>
typename std::enable_if<std::is_array<T>::value>::type
func(T& a)
{
    std::cout << "func sizeof(a)=" << sizeof(a) << '\n';
}

int main()
{
    char a[2][10]{ "test1","test2" };
    std::cout << "sizeof(a)=" << sizeof(a[0]) << '\n';
    func(a[0]);
}

static inline Settings& applicationSettings()
{
    static Settings set = getSettings(settingsFilePath);
    return set;
}