1 // RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify %s
2
__anond41462d60102null3 template <class> auto fn0 = [] {};
foo0()4 template <typename> void foo0() { fn0<char>(); }
5
__anond41462d60202(auto a) 6 template<typename T> auto fn1 = [](auto a) { return a + T(1); };
__anond41462d60302(int a = T()) 7 template<typename T> auto v1 = [](int a = T()) { return a; }();
8 // expected-error@-1{{cannot initialize a parameter of type 'int' with an rvalue of type 'int *'}}
9 // expected-note@-2{{passing argument to parameter 'a' here}}
10
11 struct S {
12 template<class T>
__anond41462d60402S13 static constexpr T t = [](int f = T(7)){return f;}(); // expected-error{{constexpr variable 't<int>' must be initialized by a constant expression}} expected-note{{cannot be used in a constant expression}}
14 };
15
16 template <typename X>
foo2()17 int foo2() {
18 X a = 0x61;
19 fn1<char>(a);
20 (void)v1<int>;
21 (void)v1<int *>; // expected-note{{in instantiation of variable template specialization 'v1' requested here}}
22 (void)S::t<int>; // expected-note{{in instantiation of static data member 'S::t<int>' requested here}}
23 return 0;
24 }
25
26 template<class C>
foo3()27 int foo3() {
28 C::m1(); // expected-error{{type 'long long' cannot be used prior to '::' because it has no members}}
29 return 1;
30 }
31
32 template<class C>
__anond41462d60502(int a = foo3<C>())33 auto v2 = [](int a = foo3<C>()){}; // expected-note{{in instantiation of function template specialization 'foo3<long long>' requested here}}
34
main()35 int main() {
36 v2<long long>(); // This line causes foo3<long long> to be instantiated.
37 v2<long long>(2); // This line does not.
38 foo2<int>();
39 }
40