c++ - How to check type safety in cppcheck or clang? -

i want static analyzer warn me invalide rvalue dereference in following code.how can in clang or cppcheck?

#include <memory>  using namespace std;  unique_ptr<int> myfunc(void) {     unique_ptr<int> a(new int(2));     return a; }   int main() {     const int& ra = *myfunc();     return 0;    } 

i cppcheck developer.

cppcheck has related checker std::string. instance, cppcheck warning code:

std::string hello();  unsigned int f() {     const char *p = hello().c_str();     return 0; } 

the warning is:

[2.cpp:4]: (error) dangerous usage of c_str(). value returned c_str() invalid after call. 

it reported because returned std::string object deleted immediately. dereferencing pointer p anywhere after initialization ub.

i think great have warning unique_ptr code also.

if interested.. feel free this.