1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
4
5 void f(int i);
6 void f(int i = 0); // expected-note {{previous definition is here}}
7 void f(int i = 17); // expected-error {{redefinition of default argument}}
8
9
10 void g(int i, int j, int k = 3);
11 void g(int i, int j = 2, int k);
12 void g(int i = 1, int j, int k);
13
14 void h(int i, int j = 2, int k = 3,
15 int l, // expected-error {{missing default argument on parameter 'l'}}
16 int, // expected-error {{missing default argument on parameter}}
17 int n);// expected-error {{missing default argument on parameter 'n'}}
18
19 struct S { } s;
i(int=s)20 void i(int = s) { } // expected-error {{no viable conversion}} \
21 // expected-note{{passing argument to parameter here}}
22
23 struct X {
24 X(int);
25 };
26
27 void j(X x = 17); // expected-note{{'::j' declared here}}
28
29 struct Y { // expected-note 2{{candidate constructor (the implicit copy constructor) not viable}}
30 #if __cplusplus >= 201103L // C++11 or later
31 // expected-note@-2 2 {{candidate constructor (the implicit move constructor) not viable}}
32 #endif
33
34 explicit Y(int); // expected-note 2{{explicit constructor is not a candidate}}
35 };
36
37 void k(Y y = 17); // expected-error{{no viable conversion}} \
38 // expected-note{{passing argument to parameter 'y' here}}
39
40 void kk(Y = 17); // expected-error{{no viable conversion}} \
41 // expected-note{{passing argument to parameter here}}
42
l()43 int l () {
44 int m(int i, int j, int k = 3);
45 if (1)
46 {
47 int m(int i, int j = 2, int k = 4);
48 m(8);
49 }
50 return 0;
51 }
52
i()53 int i () {
54 void j (int f = 4);
55 {
56 void j (int f);
57 j(); // expected-error{{too few arguments to function call, expected 1, have 0; did you mean '::j'?}}
58 }
59 void jj (int f = 4);
60 {
61 void jj (int f); // expected-note{{'jj' declared here}}
62 jj(); // expected-error{{too few arguments to function call, single argument 'f' was not specified}}
63 }
64 }
65
i2()66 int i2() {
67 void j(int f = 4); // expected-note{{'j' declared here}}
68 {
69 j(2, 3); // expected-error{{too many arguments to function call, expected at most single argument 'f', have 2}}
70 }
71 }
72
73 int pr20055_f(int x = 0, int y = UNDEFINED); // expected-error{{use of undeclared identifier}}
74 int pr20055_v = pr20055_f(0);
75
PR20769()76 void PR20769() { void PR20769(int = 1); }
77 void PR20769(int = 2);
78
79 void PR20769_b(int = 1);
PR20769_b()80 void PR20769_b() { void PR20769_b(int = 2); }
81
82 #if __cplusplus >= 201103L
f1()83 template<typename T> constexpr int f1() { return 0; }
84 // This is OK, but in order to see that we must instantiate f<int>, despite it
85 // being in an unused default argument.
g1(char c={f1<int>()})86 void g1(char c = {f1<int>()}) {} // expected-warning {{braces around scalar}}
87
88 // This is formally ill-formed, but we choose to not trigger instantiation here
89 // (at least, not until g2 is actually called in a way that uses the default
90 // argument).
f2()91 template<typename T> int f2() { return T::error; }
g2(int c=f2<int> ())92 void g2(int c = f2<int>()) {}
93
94 // FIXME: Provide a note pointing at the first use of the default argument?
f3()95 template<typename T> int f3() { return T::error; } // expected-error {{no members}}
g3(int c=f3<int> ())96 void g3(int c = f3<int>()) {} // expected-note {{in instantiation of}}
use_g3()97 void use_g3() { g3(); }
98
99 namespace PR47682 {
100 inline namespace A {
101 void f(int = 0);
102 }
103 }
f(int)104 void PR47682::f(int) {}
PR47682_test()105 void PR47682_test() { PR47682::f(); }
106 #endif
107