[C++] Demangling type name so that it is human-readable

demangle_name.cpp

#include <cxxabi.h>
#include <iostream>
#include <typeinfo>

// http://en.cppreference.com/w/cpp/types/type_info/name
// https://gcc.gnu.org/onlinedocs/libstdc++/manual/ext_demangling.html

template<typename T>
void sayMyName() {
	auto name = typeid(T).name();
	std::cout << "Raw: " << name << '\n';
	
	auto demanged = abi::__cxa_demangle(name, nullptr, nullptr, nullptr);
	std::cout << "Demangled: " << demanged << '\n' << '\n';
    	std::free(demanged);
}

class Foo {
};

using Callback = std::pair<int, int>(*)(const Foo&);

int main() {
	sayMyName<char>();
	sayMyName<signed short>();
	sayMyName<int>();
	sayMyName<unsigned long long>();
	sayMyName<float>();
	sayMyName<double>();

	sayMyName<Foo>();

	sayMyName<Callback>();
}

output.txt

Raw: c
Demangled: char

Raw: s
Demangled: short

Raw: i
Demangled: int

Raw: y
Demangled: unsigned long long

Raw: f
Demangled: float

Raw: d
Demangled: double

Raw: 3Foo
Demangled: Foo

Raw: PFSt4pairIiiERK3FooE
Demangled: std::pair<int, int> (*)(Foo const&)