1 // RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -verify -std=c++11 %s
2 template<typename T>
3 struct X {
4 T f0(T x);
5 T f1(T x);
6 T f2(T);
7 template<typename U> U f3(U x);
8 template<typename U> U f4(U x);
9 template<typename U> U f5(U);
10 };
11
f0(T x)12 template<typename T> T X<T>::f0(T x) { return x; }
f1(T)13 template<typename T> T X<T>::f1(T) { return T(); }
f2(T x)14 template<typename T> T X<T>::f2(T x) { return T(); } // expected-warning{{unused parameter 'x'}}
f3(U x)15 template<typename T> template<typename U> U X<T>::f3(U x) { return x; }
f4(U)16 template<typename T> template<typename U> U X<T>::f4(U) { return U(); }
f5(U x)17 template<typename T> template<typename U> U X<T>::f5(U x) { return U(); } // expected-warning{{unused parameter 'x'}}
18
test_X(X<int> & x,int i)19 void test_X(X<int> &x, int i) {
20 x.f0(i);
21 x.f1(i);
22 x.f2(i);
23 x.f3(i);
24 x.f4(i);
25 x.f5(i);
26 }
27
28 // Make sure both parameters aren't considered unused.
29 template <typename... T>
test_pack(T...t,T...s)30 static int test_pack(T... t, T... s)
31 {
32 auto l = [&t...]() { return sizeof...(s); };
33 return l();
34 }
35