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#include <iostream>
#define P(x) std::cout<<x<<std::endl
 
struct A {};
struct B {};
 
struct Yoba
{
   template<typename ReturnT, typename ParamT> 
   ReturnT create(ParamT);
};
 
template<> inline
A Yoba::create<A, ParamT>(ParamT x)
{
   return A();
}  
 
template<> inline
B Yoba::create<B, ParamT>(ParamT x)
{
   return B();
}  
 
 
int main()
{
   Yoba y;
   y.create<A>(1);
   y.create<B>('a');
}

prog.cpp:14:19: error: use of undeclared identifier 'ParamT'
A Yoba::create<A, ParamT>(ParamT x)
                  ^
prog.cpp:14:9: error: expected unqualified-id
A Yoba::create<A, ParamT>(ParamT x)
        ^
prog.cpp:14:27: error: unknown type name 'ParamT'
A Yoba::create<A, ParamT>(ParamT x)
                          ^
3 errors generated.

Standard output is empty