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Compiler Error C3190

  • Article

'instantiation' with the provided template arguments is not the explicit instantiation of any member function of 'type'

The compiler detected an attempt to make an explicit function instantiation; however, the provided type arguments do not match any of the possible functions.

The following sample generates C3190:

// C3190.cpp
// compile with: /LD
template<class T>
struct A {
   A(int x = 0) {
   }
   A(int x, int y) {
   }
};

template A<float>::A();   // C3190
// try the following line instead
// template A<int>::A(int);

struct Y {
   template<class T> void f(T);
};

template<class T> void Y::f(T) { }

template void Y::f(int,int);   // C3190

template<class OT> class X {
   template<class T> void f2(T,OT);
};

template<class OT> template<class T> void X<OT>::f2(T,OT) {}

template void X<float>::f2<int>(int,char);   // C3190
// try one of the following lines instead
// template void X<char>::f2(int, char);
// template void X<char>::f2<int>(int,char);
// template void X<char>::f2<>(int,char);