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Type erasure, the process of hiding or obscuring type information, is a fundamental concept in C programming. Multiple approaches exist, each offering unique advantages.
Common Techniques:
Advanced Technique:
Beyond these common methods, there exists a unique approach using shared_ptr
Example Code:
struct A { ~A() { /* destructor */ } }; { const shared_ptr<void> sp(new A); } // calls A::~A() here
Advantages and Limitations:
Each technique has its pros and cons. Virtual functions offer strong type safety but can introduce overheads caused by virtual function dispatch. Function pointers with templated functions provide greater flexibility but may require additional code boilerplate. Shared_ptr
Conclusion:
Multiple type erasure techniques exist in C , with each approach providing different trade-offs. Understanding these techniques enables developers to select the most appropriate method for their specific requirements, enabling flexibility, performance optimization, and code maintainability.
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