1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 void f(int i, int j, int k = 3); 4 void f(int i, int j, int k); 5 void f(int i, int j = 2, int k); 6 void f(int i, int j, int k); 7 void f(int i = 1, int j, int k); 8 void f(int i, int j, int k); 9 10 void i() 11 { 12 f(); 13 f(0); 14 f(0, 1); 15 f(0, 1, 2); 16 } 17 18 19 int 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 25 int x; 26 void g(int x, int y = x); // expected-error {{default argument references parameter 'x'}} 27 28 void g2(int x, int y, int z = x + y); // expected-error {{default argument references parameter 'x'}} expected-error {{default argument references parameter 'y'}} 29 30 class X { 31 void f(X* x = this); // expected-error{{invalid use of 'this' outside of a nonstatic 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 39 class 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 }; 46 void C::f(int i = 3) // expected-error{{redefinition of default argument}} 47 { } 48 49 void C::g(int i = 88, int j) {} 50 51 void C::h() { 52 g(); // okay 53 } 54 55 // C++ [dcl.fct.default]p9 56 struct Y { 57 int a; 58 int mem1(int i = a); // expected-error{{invalid use of nonstatic 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 nonstatic data member 'a'}} 68 Nested* self = this, // expected-error{{invalid use of 'this' outside of a nonstatic member function}} 69 int m); // expected-error{{missing default argument on parameter 'm'}} 70 static int c; 71 }; 72 73 static int b; 74 }; 75 76 int Y::mem3(int i = b) { return i; } // OK; use X::b 77 78 int Y::mem4(int i = a) // expected-error{{invalid use of nonstatic data member 'a'}} 79 { return i; } 80 81 82 // Try to verify that default arguments interact properly with copy 83 // constructors. 84 class Z { 85 public: 86 Z(Z&, int i = 17); // expected-note 3 {{candidate constructor}} 87 88 void f(Z& z) { 89 Z z2; // expected-error{{no matching constructor for initialization}} 90 Z z3(z); 91 } 92 93 void test_Z(const Z& z) { 94 Z z2(z); // expected-error{{no matching constructor for initialization of 'class Z'}} 95 } 96 }; 97 98 void test_Z(const Z& z) { 99 Z z2(z); // expected-error{{no matching constructor for initialization of 'class Z'}} 100 } 101 102 struct ZZ { 103 static ZZ g(int = 17); 104 105 void f(ZZ z = g()); // expected-error{{no matching constructor for initialization}} 106 107 ZZ(ZZ&, int = 17); // expected-note{{candidate constructor}} 108 }; 109 110 // http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#325 111 class C2 { 112 static void g(int = f()); // expected-error{{use of default argument to function 'f' that is declared later in class 'C2'}} 113 static int f(int = 10); // expected-note{{default argument declared here}} 114 }; 115 116 // Make sure we actually parse the default argument for an inline definition 117 class XX { 118 void A(int length = -1 ) { } 119 void B() { A(); } 120 }; 121