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#include <iostream>
#include <vector>
#include <type_traits>
 
namespace data
{
	struct Foo {};
 
	template <typename T>
	void func(const std::vector<typename std::enable_if<std::is_pod<T>::value, T>::type>& contents)
	{
		std::cout << "Blah" << std::endl;
	}
}
 
int main()
{
	std::vector<data::Foo> vec;
	func(vec);
	return 0;
}

prog.cpp: In function 'int main()':
prog.cpp:19:10: error: no matching function for call to 'func(std::vector<data::Foo>&)'
  func(vec);
          ^
prog.cpp:10:7: note: candidate: template<class T> void data::func(const std::vector<typename std::enable_if<std::is_pod<T>::value, T>::type>&)
  void func(const std::vector<typename std::enable_if<std::is_pod<T>::value, T>::type>& contents)
       ^
prog.cpp:10:7: note:   template argument deduction/substitution failed:
prog.cpp:19:10: note:   couldn't deduce template parameter 'T'
  func(vec);
          ^

Standard output is empty