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Avoiding Memory Leaks in C++ Without Smart Pointers

Tutorial April 11, 2025 

template <typename T>
class ScopedArray {
private:
    T* ptr;

public:
    explicit ScopedArray(T* p = nullptr) : ptr(p) {}

    ~ScopedArray() {
        delete[] ptr;
    }

    T& operator[](int index) const { return ptr[index]; }
    T* get() const { return ptr; }

    void reset(T* p = nullptr) {
        if (ptr != p) {
            delete[] ptr;
            ptr = p;
        }
    }

    // Prevent copy
    ScopedArray(const ScopedArray&) = delete;
    ScopedArray& operator=(const ScopedArray&) = delete;
};
#include "ScopedPointer.h"

void loadData() {
    ScopedArray<char> buffer(new char[1024]);

    if (someCondition()) {
        return; // no memory leak!
    }

    // buffer is auto-deleted when going out of scope
}

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