#includeIn this example, we create a SmallPtrSet that can hold up to four pointers to MyStruct objects. We then create two objects and insert their pointers into the set using the insert function. We use the count function to check if one of the objects is already in the set, and then iterate over all elements in the set using a range-based for loop. The SmallPtrSet container is part of the LLVM library, a collection of reusable software components for building compilers and other programming tools.#include struct MyStruct { int myInt; bool myBool; }; int main() { llvm::SmallPtrSet mySet; MyStruct *s1 = new MyStruct; s1->myInt = 1; s1->myBool = true; MyStruct *s2 = new MyStruct; s2->myInt = 2; s2->myBool = false; // Insert two pointers to MyStruct objects into the set mySet.insert(s1); mySet.insert(s2); // Check if a pointer is already in the set if (mySet.count(s1)) { std::cout << "s1 is in the set!" << std::endl; } // Iterate over elements in the set for (auto *s : mySet) { std::cout << "MyStruct with myInt = " << s->myInt << " and myBool = " << s->myBool << std::endl; } return 0; }