C++ Template partial specialization problems
Author
Can someone tell why this doesn't compile in VC++ 2003?
struct CBase {
int m_Value1;
};
template <int __T>
struct CTemplate : public CBase {
int m_Value2;
};
template <>
struct CTemplate<1234> {
int m_Value3;
};
void Test()
{
CTemplate<1230> test1;
CTemplate<1234> test2;
test1.m_Value1;
test1.m_Value2;
test2.m_Value1; <--- Error
test2.m_Value2; <--- Error
test2.m_Value3;
}
No inheriage from specialized templates?? Is this actually C++ standard?
Simple. Partial template specialisation dun't work in VS.NET 2002 - dun't know if they fixed that in 2003.
Partial template specialization works fine in VC++ 2003. Besides, you're not doing partial specialization here, you're doing full specialization.
According to your code, test2 will be a structure with m_Value3 only because CTemplate<1234> has no base. As far as I see, the compiler works fine.
According to your code, test2 will be a structure with m_Value3 only because CTemplate<1234> has no base. As far as I see, the compiler works fine.
Again, what you are doing is explicit specialization, not partial. Your code doesn't compile because you didn't inherit from CBase nor declare m_Value2 in your specialization, therefore they don't exist in your second object. .NET 2003 works perfectly fine with explicit and partial specialization.
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