5.3.5/7 says: If the value of the operand of the delete-expression is not a null pointer value, the delete-expression will call a deallocation function (3.7.4.2). Otherwise, it is unspecified whether the deallocation function will be called. And 3.7.4.2/3 says: The value of the first argument supplied to a deallocation function may be a null pointer … Read more
delete[] monsters; Is incorrect because monsters isn’t a pointer to a dynamically allocated array, it is an array of pointers. As a class member it will be destroyed automatically when the class instance is destroyed. Your other implementation is the correct one as the pointers in the array do point to dynamically allocated Monster objects. … Read more
The delete operator deallocates memory and calls the destructor for a single object created with new. The delete [] operator deallocates memory and calls destructors for an array of objects created with new []. Using delete on a pointer returned by new [] or delete [] on a pointer returned by new results in undefined … Read more
In reality, an array of pointers pointed to by a pointer is still an array of integral data types or numbers to hold the memory addresses. You should use delete[] for both. Also, yes, a new[] implies a delete[]. When you create an array of arrays, you’re actually creating an array of numbers that happen to hold the memory address for another array … Read more
You can call clear, and that will destroy all the objects, but that will not free the memory. Looping through the individual elements will not help either (what action would you even propose to take on the objects?) What you can do is this: That will create an empty vector with no memory allocated and … Read more
There’s no new/delete expression in C. The closest equivalent are the malloc and free functions, if you ignore the constructors/destructors and type safety.
delete will delete the object property, but will not reindex the array or update its length. This makes it appears as if it is undefined: Note that it is not in fact set to the value undefined, rather the property is removed from the array, making it appear undefined. The Chrome dev tools make this distinction clear by printing empty when … Read more
Deleting a function is a C++11 feature: The common idiom of “prohibiting copying” can now be expressed directly: […] The “delete” mechanism can be used for any function. For example, we can eliminate an undesired conversion like this:
The C++ FAQ Lite has a entry specifically for this https://isocpp.org/wiki/faq/freestore-mgmt#delete-this I think this quote sums it up nicely As long as you’re careful, it’s OK for an object to commit suicide (delete this).