t21.c

来自「this is a gcc file, you can download it 」· C语言 代码 · 共 9 行

// Build don't link: 

template <class X> class A { public: int a; X x; };
template <class X> X f (A<X> a) { return a.x; }

extern A<double> a_dbl;

double fred () { return f (a_dbl); }