product/lifetime.cpp (e120db9) - testcode.git

lifetime.cpp

#include "lifetime.h"
#include <cstdio>
#include <array>

// From C++ Weekly with Jason Turner
// https://www.youtube.com/watch?v=6SaUwqw4ueE
//
// Test with:
// ls -1 lifetime* | entr sh -c 'g++ -Wall -std=c++17 lifetime.cpp && valgrind -q --leak-check=yes --show-leak-kinds=all ./a.out'

Lifetime::Lifetime()
{
    std::puts("Lifetime() // default ctor");
}

Lifetime::~Lifetime()
{
    std::puts("~Lifetime() // destructor");
}

Lifetime::Lifetime(const Lifetime &)
{
    std::puts("Lifetime(const Lifetime &) // copy ctor");
}

Lifetime::Lifetime(Lifetime &&)
{
    std::puts("Lifetime(Lifetime &&) // move ctor");
}

Lifetime &Lifetime::operator=(Lifetime &&)
{
    std::puts("operator=(const Lifetime &&) // move assign");
    return *this;
}

Lifetime &Lifetime::operator=(const Lifetime &)
{
    std::puts("operator=(const Lifetime &) // copy assign");
    return *this;
}

/*
int main()
{
#if 0
    Lifetime l1;
    Lifetime l2;
    std::array<Lifetime, 2> a{l1, l2};
#elif 1
    Lifetime l1;
    Lifetime l2;
    std::array<Lifetime, 2> a{std::move(l1), std::move(l2)};
#else
    auto make_lifetime = [](const int value) {
        // Benefits from return value optimization
        Lifetime l;
        l.data_ = value;
        return l;
    };

std::array<Lifetime, 2> a{make_lifetime(42), make_lifetime(43)};
#endif
}
*/

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