default-expr-arguments.cpp revision 25cae7f4b1155b1a6ca959ea5143ea39eae656cd 
1// RUN: clang-cc -fsyntax-only -verify %s
2
3struct S { };
4
5template<typename T> void f1(T a, T b = 10) { } // expected-error{{cannot initialize 'b' with an rvalue of type 'int'}}
6
7template<typename T> void f2(T a, T b = T()) { }
8
9template<typename T> void f3(T a, T b = T() + T()); // expected-error{{invalid operands to binary expression ('struct S' and 'struct S')}}
10
11void g() {
12  f1(10);
13  f1(S()); // expected-note{{in instantiation of default function argument expression for 'f1<struct S>' required here}}
14
15  f2(10);
16  f2(S());
17
18  f3(10);
19  f3(S()); // expected-note{{in instantiation of default function argument expression for 'f3<struct S>' required here}}
20}
21
22template<typename T> struct F {
23  F(T t = 10);
24};
25
26struct FD : F<int> { };
27
28void g2() {
29  F<int> f;
30  FD fd;
31}
32
33template<typename T> struct G {
34  G(T) {}
35};
36
37void s(G<int> flags = 10) { }
38
39
40