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// move and copy test
#include <iostream>
#include <vector>
#include <memory>
#include <unordered_map>
struct A {
A() { std::cout << "A ctor." << std::endl; }
A(A&& rhs) noexcept { std::cout << "A move." << std::endl; moved = true; }
A(const A&) = delete;
~A() { if( ! moved ) std::cout << "A dtor." << std::endl; }
private:
bool moved = false;
};
std::vector<A> v;
void f(A a) {
v.push_back( std::move(a) );
}
void g() {
std::unique_ptr<A> pa( new A );
typedef std::unordered_map<int, std::unique_ptr<A> > map_type;
map_type m;
m.emplace( 3, std::move(pa) );
std::cout << "get A." << std::endl;
auto it = m.find(3);
it->second.get();
std::cout << "got A." << std::endl;
std::cout << "get A take2." << std::endl;
std::unique_ptr<A>& alias = m.at(3);
A a( std::move(*alias) );
std::cout << "got A take2." << std::endl;
}
int main(int argc, char** argv) {
A a;
f( std::move(a) );
std::vector<int> iv = {1, 2, 3};
std::vector<int> iv2 = iv;
for( auto i : iv2 ) {
std::cout << i << std::endl;
}
g();
return 0;
}
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