멤버 템플릿을 특수화 할 때 주의점

//#define TEST1_FIX
struct Test1 {
template <typename T1_, typename T2_>
void MemberFunc(T1_, T2_) {
cout << "template <typename T1_, typename T2_> void Test1::MemberFunc(T1_, T2_);" << endl;
}
#ifndef TEST1_FIX
template <> // 이 부분에서 컴파일 오류 발생!!
void MemberFunc<double, int>(double, int) {
cout << "template <> void Test1::MemberFunc<double, int>(double, int);" << endl;
}
#endif
};
#ifdef TEST1_FIX
template <>
void Test1::MemberFunc<double, int>(double, int) {
cout << "template <> void Test1::MemberFunc<double, int>(double, int);" << endl;
}
#endif

#define TEST2_FIX
struct Test2 {
template <typename T1_, typename T2_>
struct InnerType {
InnerType() { cout << "template <typename T1_, typename T2_> struct Test2::InnerType;" << endl; }
};
template <typename T1_>
struct InnerType<T1_, int> { // 부분 특수화는 OK!!
InnerType() { cout << "template <typename T1_> struct Test2::InnerType<T1_, int>;" << endl; }
};
#ifndef TEST2_FIX
template <>
struct InnerType<int, double> {
InnerType() { cout << "template <> struct Test2::InnerType<int, double>;" << endl; }
};
#endif
};
#ifdef TEST2_FIX
template <>
struct Test2::InnerType<int, double> {
InnerType() { cout << "template <> struct Test2::InnerType<int, double>;" << endl; }
};
#endif