c++11.txt

# c++11

The AUTO keyword can be used to make the compiler automatically deduce
the type of an object from its initializer.

Instead of: std::map<std::vector<unsigned long>, std::map<unsigned
short, long>>::const_iterator itr = map.begin()

Now use: auto itr = map.begin()

RANGE BASED FOR LOOPS are especially nice for iterating over containers:

std::vector<int> vec

for (auto itr : vec) { ++(*itr); }

The OVERRIDE identifier can be used to mark derived methods as overrides
of base class virtual functions. The FINAL  identifier makes it
impossible for derived classes to implement a certain virtual method.

class A

{

public:

     virtual void foo();

};

class B : public A

{

public:

     virtual void foo() override final; // makes compiler know that this
is an override, will check for correct types; makes it impossible for
derived classes to override that method

};

class C : public B

{

public:

     virtual void foo(); // Error! B marked foo() as final!

};

To set certain functions to their C++ default, use the DEFAULT keyword
after functions. E.g., for default constructors that you still want to
have defined (for smart pointers for example) but don’t want to have any
custom implementation:

~Foo() = default;