1// RUN: %clang_cc1 -fsyntax-only -verify %s 2 3void f(int i, int j, int k = 3); 4void f(int i, int j, int k); 5void f(int i, int j = 2, int k); 6void f(int i, int j, int k); 7void f(int i = 1, int j, int k); 8void f(int i, int j, int k); 9 10void i() 11{ 12 f(); 13 f(0); 14 f(0, 1); 15 f(0, 1, 2); 16} 17 18 19int f1(int i, // expected-note {{previous declaration is here}} 20 int i, int j) { // expected-error {{redefinition of parameter 'i'}} 21 i = 17; 22 return j; 23} 24 25int x; 26void g(int x, int y = x); // expected-error {{default argument references parameter 'x'}} 27 28void g2(int x, int y, int z = x + y); // expected-error {{default argument references parameter 'x'}} expected-error {{default argument references parameter 'y'}} 29 30class X { 31 void f(X* x = this); // expected-error{{invalid use of 'this' outside of a non-static member function}} 32 33 void g() { 34 int f(X* x = this); // expected-error{{default argument references 'this'}} 35 } 36}; 37 38// C++ [dcl.fct.default]p6 39class C { 40 static int x; 41 void f(int i = 3); // expected-note{{previous definition is here}} 42 void g(int i, int j = x); 43 44 void h(); 45}; 46void C::f(int i = 3) // expected-error{{redefinition of default argument}} 47{ } 48 49void C::g(int i = 88, int j) {} 50 51void C::h() { 52 g(); // okay 53} 54 55// C++ [dcl.fct.default]p9 56struct Y { 57 int a; 58 int mem1(int i = a); // expected-error{{invalid use of non-static data member 'a'}} 59 int mem2(int i = b); // OK; use Y::b 60 int mem3(int i); 61 int mem4(int i); 62 63 struct Nested { 64 int mem5(int i = b, // OK; use Y::b 65 int j = c, // OK; use Y::Nested::c 66 int k = j, // expected-error{{default argument references parameter 'j'}} 67 int l = a, // expected-error{{invalid use of non-static data member 'a'}} 68 Nested* self = this, // expected-error{{invalid use of 'this' outside of a non-static member function}} 69 int m); // expected-error{{missing default argument on parameter 'm'}} 70 static int c; 71 Nested(int i = 42); 72 }; 73 74 int mem7(Nested n = Nested()); 75 76 static int b; 77}; 78 79int Y::mem3(int i = b) { return i; } // OK; use X::b 80 81int Y::mem4(int i = a) // expected-error{{invalid use of non-static data member 'a'}} 82{ return i; } 83 84 85// Try to verify that default arguments interact properly with copy 86// constructors. 87class Z { 88public: 89 Z(Z&, int i = 17); // expected-note 3 {{candidate constructor}} 90 91 void f(Z& z) { 92 Z z2; // expected-error{{no matching constructor for initialization}} 93 Z z3(z); 94 } 95 96 void test_Z(const Z& z) { 97 Z z2(z); // expected-error{{no matching constructor for initialization of 'Z'}} 98 } 99}; 100 101void test_Z(const Z& z) { 102 Z z2(z); // expected-error{{no matching constructor for initialization of 'Z'}} 103} 104 105struct ZZ { 106 static ZZ g(int = 17); 107 108 void f(ZZ z = g()); // expected-error{{no matching constructor for initialization}} \ 109 // expected-note{{passing argument to parameter 'z' here}} 110 111 ZZ(ZZ&, int = 17); // expected-note{{candidate constructor}} 112}; 113 114// http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#325 115class C2 { 116 static void g(int = f()); // expected-error{{use of default argument to function 'f' that is declared later in class 'C2'}} 117 static int f(int = 10); // expected-note{{default argument declared here}} 118}; 119 120// Make sure we actually parse the default argument for an inline definition 121class XX { 122 void A(int length = -1 ) { } 123 void B() { A(); } 124}; 125 126template <int I = (1 * I)> struct S {}; // expected-error-re {{use of undeclared identifier 'I'{{$}}}} 127S<1> s; 128 129template <int I1 = I2, int I2 = 1> struct T {}; // expected-error-re {{use of undeclared identifier 'I2'{{$}}}} 130T<0, 1> t; 131