EECS 280 Lecture Notes - Lecture 16: Object Copying, Dynamic Array
11 Nov 2018
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If you have an array in the heap, you have to erase it by: delete[] elts; If you don"t use the [], it"ll be undefined. Foo(s); // makes a pointer to the same thing that unordered_set is pointing to in the heap. //but after this code runs, it deletes what"s in the heap when the destructor runs. S. query(5); //this can"t run because what"s in the heap has been erased. A copy constructor customizes how a class is copied. Is the same thing as = unordered_set t(s); Keep in mind that the code for the copy constructor is not inside of the foo function. What happens is that the compiler sees that we"re making a copy and automatically uses the code we have written inside of our copy ctor inside of the class. The copy ctor has to initialize member variables and copy everything. For (int i = 0; i < elts_size; ++i) {
