How to unmangle mangled names of C++ lambdas?

Question

After compilation with g++-4.9.3 -std=c++11 the code

#include 
#include 
using namespace std;
int main() { cout          


        

Answer 1

Using c++filt version 070207 20070207:

$ c++filt -n Z4mainEUlvE_
main::'lambda'()

Although as the commenters have suggested, these names aren't always entirely helpful.