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#include <iostream>
 
template <typename FuncType>
std::pair<int,int> DoSomething() {
	return FuncType()(std::make_pair(1,1));
}
 
int main() {
	auto myLambda = [](std::pair<int,int> x) {
		return std::make_pair(x.first*2,x.second*2);
	};
	std::pair<int,int> res = DoSomething<decltype(myLambda)>();
	return 0;
}

prog.cpp: In instantiation of ‘std::pair<int, int> DoSomething() [with FuncType = main()::<lambda(std::pair<int, int>)>]’:
prog.cpp:12:59:   required from here
prog.cpp:5:9: error: use of deleted function ‘main()::<lambda(std::pair<int, int>)>::<lambda>()’
  return FuncType()(std::make_pair(1,1));
         ^~~~~~~~~~
prog.cpp:9:19: note: a lambda closure type has a deleted default constructor
  auto myLambda = [](std::pair<int,int> x) {
                   ^

Standard output is empty