C++ High Performance

Handling resources implicitly

First, make your objects implicitly handle the allocation/deallocation of dynamic memory:

auto func() { 
  auto v = std::vector<int>{1, 2, 3, 4, 5}; 
} 

In the preceding example, we are using both stack and dynamic memory, but we don't have to explicitly call new and delete. The std::vector object (of the std::vector class) we create is an automatic object that will live on the stack. Since it is owned by the scope, it will be automatically destroyed when the function returns. The std::vector object itself uses dynamic memory to store the integer elements. When the std::vector object goes out of scope, its destructor can safely free the dynamic memory. This pattern of letting destructors free dynamic memory makes ...