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template <typename U> class nest1 {};
 
class cls {
public:
    template <typename V> class nest1 {};
 
	template <typename W> class nest2 {
	public:
		void bar(nest1<W> x);
	};
};
 
 
template <typename W>
void cls::nest2<W>::bar(nest1<W> x) {}
 
 
int main(int argc, const char* argv[]) {
	cls::nest1<int> x;
	nest2<int> y;
	y.bar(x);
 
	return 0;
}
 

prog.cpp: In function ‘int main(int, const char**)’:
prog.cpp:20:2: error: ‘nest2’ was not declared in this scope
prog.cpp:20:8: error: expected primary-expression before ‘int’
prog.cpp:20:8: error: expected ‘;’ before ‘int’
prog.cpp:21:2: error: ‘y’ was not declared in this scope

Standard output is empty