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#include <iostream>
 
// 2 overloads, comment one and it will work
void f();
void f(int);
 
template<typename T> 
void my_transform(T&& functor){}
 
int main()
{
    my_transform(f); // cannot deduce the type of f due to overloads
}
 

prog.cpp: In function 'int main()':
prog.cpp:12:19: error: no matching function for call to 'my_transform(<unresolved overloaded function type>)'
     my_transform(f); // cannot deduce the type of f due to overloads
                   ^
prog.cpp:12:19: note: candidate is:
prog.cpp:8:6: note: template<class T> void my_transform(T&&)
 void my_transform(T&& functor){}
      ^
prog.cpp:8:6: note:   template argument deduction/substitution failed:
prog.cpp:12:19: note:   couldn't deduce template parameter 'T'
     my_transform(f); // cannot deduce the type of f due to overloads
                   ^

Standard output is empty