template<typename T>
struct X0;
template<int I>
struct X1;
template<int I>
struct X2;
template<int I>
struct X3;
template<template<int I> class>
struct X4;
template<template<long> class>
struct X5;
template<typename>
struct X6;
extern X0<int> *x0i;
extern X0<long> *x0l;
extern X0<float> *x0r;
template<>
struct X0<char> {
int member;
};
template<>
struct X0<wchar_t> {
int member;
};