Question

I would like to get to know C++11 a little bit more, So I wrote the simplest possible initializer_list test I knew, but inside of a template, this is a “free” function,
and I get this error whenever I compile it (clang++ for pretty formatting)

/home/alex/repo/mine/mlcppl/test/utiltest1.cc:16:3: error: no matching function for call to 'makevec'
mlcppl::makevec<string> ({"alex", "herrmann"});

Here is the code:

namespace mlcppl{
 template<typename Tp> vector<Tp> makevec (initializer_list<Tp> initlist)
 {
   vector<Tp> vt;
   for(Tp x : initlist)
     {
       vt.insert(vt.end(), x);
     }
  return vt;
  }
 }

and here is where it is called:

#include <util.hh>
int main()
{
  vector<string> vc;
  vc = makevec<string> ({"alex", "herrmann"});
  return 0;
}

I have no clue why this would happen, Any suggestions?

Answer 1

This works with g++ (Ideone):

#include <vector>
#include <string>

template<typename Tp> std::vector<Tp> makevec (std::initializer_list<Tp> initlist) { return initlist; }

int main() { makevec<std::string> ({"alex", "herrmann"}); }

Which clang++?