[Demangle C++ types] Demangle #C++

demangle_name.cpp

#include <memory>
#include <string>
#include <cxxabi.h>

class Demangler
{
public:

    template <class T>
    static std::string compute_object_name (T& obj)
    {
        const std::string mangled_name = typeid (obj).name ();
        
        int status = -1;
        std::unique_ptr<char, void(*)(void*)> res 
        { 
            abi::__cxa_demangle (mangled_name.c_str(), 
                                 nullptr, 
                                 nullptr, 
                                 &status), 
            std::free 
        };
        
        if (status == 0)
            return res.get();
        
        return mangled_name;
    }
};

/*
Example usage:

class Foo
{
public:
    Foo() = default;
    ~Foo() = default;
    void print_name() const { std::cout << Demangler::compute_object_name (*this) << std::endl; }
};
*/