c_wrapper.hpp

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#ifndef CODEX_C_WRAPPER_H
#define CODEX_C_WRAPPER_H
 
#include <cassert>
#include <utility>
 
namespace codex {
 
template<auto F> struct CWrapper;
 
template<typename T, typename R, typename ...Args, R (T::*f)(Args...)>
struct CWrapper<f> {
    static R wrapper(void *p, Args ...args) {
        assert(p);
        return (static_cast<T*>(p)->*f)(std::forward<Args>(args)...);
    }
    (*operator R())(void*, Args...) { return &CWrapper::wrapper; }
};
 
}
 
#endif