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#include <iostream>
using namespace std;
 
template<class C>
class Bar
{
	public:
	 Bar(C& c) : _c(c) {};
	 ~Bar(){};
 
	private:
	 C& _c;
};
 
class Foo
{
	public:
	 Foo() : bar(this) {}; //instead of bar(*this)
	 ~Foo(){};
 
	private:
	 Bar<Foo> bar;
};
 
 
int main() {
	// your code goes here
	Foo f;
	return 0;
}

prog.cpp: In constructor 'Foo::Foo()':
prog.cpp:18:19: error: no matching function for call to 'Bar<Foo>::Bar(Foo*)'
   Foo() : bar(this) {};
                   ^
prog.cpp:18:19: note: candidates are:
prog.cpp:8:3: note: Bar<C>::Bar(C&) [with C = Foo]
   Bar(C& c) : _c(c) {};
   ^
prog.cpp:8:3: note:   no known conversion for argument 1 from 'Foo*' to 'Foo&'
prog.cpp:5:7: note: Bar<Foo>::Bar(const Bar<Foo>&)
 class Bar
       ^
prog.cpp:5:7: note:   no known conversion for argument 1 from 'Foo*' to 'const Bar<Foo>&'

Standard output is empty