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Compiler Error C2923

Error Message

'type' : 'identifier' is not a valid template type argument for parameter 'param'

The argument list is missing a type needed to instantiate the template or generic. Check the template or generic declaration.

The following sample generates C2923:

// C2923.cpp
template <class T> struct TC {};
int x;
int main() {
   TC<x>* tc2;   // C2923
   TC<int>* tc2;   // OK

C2923 can also occur when using generics:

// C2923b.cpp
// compile with: /clr /c
generic <class T> ref struct GC {};

int x;

int main() {
   GC<x>^ gc2;   // C2923
   GC<int>^ gc2;   // OK