std::shared_ptr and initializer lists

Question

The std::shared_ptr constructor isn't behaving as I expected:

#include <iostream> #include <vector>  void func(std::vector<std::string> strings) {     for (auto const& string : strings)     {         std::cout << string << '\n';     } }  struct Func {     Func(std::vector<std::string> strings)     {         for (auto& string : strings)         {             std::cout << string << '\n';         }     } };  int main(int argc, const char * argv[]) {      func({"foo", "bar", "baz"});     Func({"foo", "bar", "baz"});     //auto ptr = std::make_shared<Func>({"foo", "bar", "baz"}); // won't compile.     //auto ptr = std::make_shared<Func>{"foo", "bar", "baz"}; // nor this.     return 0; } 

Am I doing something wrong or is the compiler? The compiler is:

$ clang++ --version Apple clang version 4.0 (tags/Apple/clang-421.0.57) (based on LLVM 3.1svn)

edit: shared_ptr instead of make_shared.

Here's the error:

make -k  clang++ -std=c++11 -stdlib=libc++    main.cc   -o main main.cc:28:18: error: no matching function for call to 'make_shared'       auto ptr = std::make_shared<Func>({"foo", "bar", "baz"});                  ^~~~~~~~~~~~~~~~~~~~~~ /usr/bin/../lib/c++/v1/memory:4621:1: note: candidate function not viable:      requires 0 arguments, but 1 was provided make_shared(_Args&& ...__args) ^ 1 error generated. 

Answer 1

Try this:

auto ptr = std::make_shared<Func>(std::initializer_list<std::string>{"foo", "bar", "baz"}); 

Clang is not willing to deduce the type of {"foo", "bar", "baz"}. I'm currently not sure whether that is the way the language is supposed to work, or if we're looking at a compiler bug.