How do I interoperate with C APIs std::tuple in C++?

Interoperating with C APIs in C++ can sometimes be challenging, especially when dealing with complex data structures like `std::tuple`. This document provides an example of how to wrap a C function that returns a tuple in a way that allows for easy access and manipulation in C++.

#include <tuple> #include <iostream> // Sample C function that we want to use extern "C" { void getValues(int* x, double* y, const char** z) { *x = 42; *y = 3.14; *z = "Hello, World!"; } } // C++ wrapper over the C function returning a tuple std::tuple getTupleValues() { int x; double y; const char* z; getValues(&x, &y, &z); return std::make_tuple(x, y, std::string(z)); } int main() { auto values = getTupleValues(); std::cout << "Values: " << std::get<0>(values) << ", " << std::get<1>(values) << ", " << std::get<2>(values) << std::endl; return 0; }

C++ C APIs std::tuple interoperability tuple wrapper

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