c++ figure out weird template arguments

gistfile1.txt

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

void main(){
    int status;
    char * producerType = abi::__cxa_demangle(typeid(someType).name(),0,0,&status);
    char * consumerType = abi::__cxa_demangle(typeid(someType).name(),0,0,&status);
    std::cout << "Producer type: " << producerType << "\n";
    std::cout << "Consumer type: " << consumerType << "\n";
    free(producerType);
    free(consumerType);
    }