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構造函數和複製構造函數如何查找此可變參數模板類?variadic模板類中的(簡單)構造函數
struct A {};
struct B {};
template < typename Head,
typename... Tail>
struct X : public Head,
public Tail...
{
X(int _i) : i(_i) { }
// add copy constructor
int i;
};
template < typename Head >
struct X<Head> { };
int main(int argc, const char *argv[])
{
X<A, B> x(5);
X<A, B> y(x);
// This must not be leagal!
// X<B, A> z(x);
return 0;
}
像其他人一樣嗎? – 2012-01-07 14:11:26