kohakus

/* Some Singleton Implementation Examples. */
/* Mainly consider of lazy initialization. */


// Version 1: simple lazy singleton.
// Not thread safe. Can only be used in single thread.
template<typename T>
class Singleton {
public:
    static T& getInstance() {

kohakus

#include <iostream>
#include <cinttypes>

int main (void) {
    uint32_t       num = 0x04030201;
    unsigned char* cp = reinterpret_cast<unsigned char*>(&num);

    if (*cp == 1) {
        std::cout << "littile-endian" << std::endl;
    } else if (*cp == 4) {

kohakus

// Reference Rules for a variable
// a). At any given time, you can have either (but not both of) one mutable reference or any number of immutable references.
// b). References must always be valid.

// First we define a simple struct
struct Foo<T> {
    data: T,
}

impl<T> Foo<T> {