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#define GEN(Fun, Ret, Arg1, Arg2, TemplateArgs)	\
template<TemplateArgs>	                        \
Ret Fun(Arg1, Arg2)		                        \
{						                        \
	return Ret();                               \
}
 
GEN(f, int, T, T, typename T);
GEN(g, int, T, U, typename T, typename U);
 
int main()
{
	f(5, 7);
	g(5, 7.);
}

prog.cpp:9:41: error: macro "GEN" passed 6 arguments, but takes just 5
 GEN(g, int, T, U, typename T, typename U);
                                         ^
prog.cpp:9:1: error: ‘GEN’ does not name a type
 GEN(g, int, T, U, typename T, typename U);
 ^
prog.cpp: In function ‘int main()’:
prog.cpp:14:9: error: ‘g’ was not declared in this scope
  g(5, 7.);
         ^

Standard output is empty