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Compiler Error C2784

'declaration' : could not deduce template argument for 'type' from 'type'

The compiler cannot determine a template argument from the supplied function arguments.

The following sample generates C2784:

// C2784.cpp
template<class T> class X {};
template<class T> void f(X<T>) {}

int main() {
   X<int> x;
   f(1);   // C2784

   // try the following line instead

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