To better understand the extent to which code has to execute so as to allocate a variable on the heap, we will start with the following simple example:
int main(void){ auto ptr = std::make_unique<int>();}
As shown in the preceding example, we allocate an integer using std::unique_ptr(). We use std::unique_ptr() as our starting point, as this is how most C++ Core Guideline code will allocate memory on the heap.
The std::make_unique() function allocates a std::unique_ptr using the following pseudo logic (this is a simplified example as this doesn't show how custom deleters are handled):
namespace std{ template<typename T, typename... ARGS> auto make_unique(ARGS... args) { return std::unique_ptr(new T(std::forward<ARGS>(args)...)); ...
