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// RUN: %clang_cc1 -fsyntax-only -verify %s
template<typename T>
class C { C(int a0 = 0); };
template<>
C<char>::C(int a0);
struct S { }; // expected-note 3 {{candidate constructor (the implicit copy constructor)}}
template<typename T> void f1(T a, T b = 10) { } // expected-error{{no viable conversion}} \
// expected-note{{passing argument to parameter 'b' here}}
template<typename T> void f2(T a, T b = T()) { }
template<typename T> void f3(T a, T b = T() + T()); // expected-error{{invalid operands to binary expression ('S' and 'S')}}
void g() {
f1(10);
f1(S()); // expected-note{{in instantiation of default function argument expression for 'f1<S>' required here}}
f2(10);
f2(S());
f3(10);
f3(S()); // expected-note{{in instantiation of default function argument expression for 'f3<S>' required here}}
}
template<typename T> struct F {
F(T t = 10); // expected-error{{no viable conversion}} \
// expected-note{{passing argument to parameter 't' here}}
void f(T t = 10); // expected-error{{no viable conversion}} \
// expected-note{{passing argument to parameter 't' here}}
};
struct FD : F<int> { };
void g2() {
F<int> f;
FD fd;
}
void g3(F<int> f, F<struct S> s) {
f.f();
s.f(); // expected-note{{in instantiation of default function argument expression for 'f<S>' required here}}
F<int> f2;
F<S> s2; // expected-note{{in instantiation of default function argument expression for 'F<S>' required here}}
}
template<typename T> struct G {
G(T) {}
};
void s(G<int> flags = 10) { }
// Test default arguments
template<typename T>
struct X0 {
void f(T = T()); // expected-error{{no matching}}
};
template<typename U>
void X0<U>::f(U) { }
void test_x0(X0<int> xi) {
xi.f();
xi.f(17);
}
struct NotDefaultConstructible { // expected-note 2{{candidate}}
NotDefaultConstructible(int); // expected-note 2{{candidate}}
};
void test_x0_not_default_constructible(X0<NotDefaultConstructible> xn) {
xn.f(NotDefaultConstructible(17));
xn.f(42);
xn.f(); // expected-note{{in instantiation of default function argument}}
}
template<typename T>
struct X1 {
typedef T value_type;
X1(const value_type& value = value_type());
};
void test_X1() {
X1<int> x1;
}
template<typename T>
struct X2 {
void operator()(T = T()); // expected-error{{no matching}}
};
void test_x2(X2<int> x2i, X2<NotDefaultConstructible> x2n) {
x2i();
x2i(17);
x2n(NotDefaultConstructible(17));
x2n(); // expected-note{{in instantiation of default function argument}}
}
// PR5283
namespace PR5283 {
template<typename T> struct A {
A(T = 1); // expected-error 3 {{cannot initialize a parameter of type 'int *' with an rvalue of type 'int'}} \
// expected-note 3{{passing argument to parameter here}}
};
struct B : A<int*> {
B();
};
B::B() { } // expected-note {{in instantiation of default function argument expression for 'A<int *>' required he}}
struct C : virtual A<int*> {
C();
};
C::C() { } // expected-note {{in instantiation of default function argument expression for 'A<int *>' required he}}
struct D {
D();
A<int*> a;
};
D::D() { } // expected-note {{in instantiation of default function argument expression for 'A<int *>' required he}}
}
// PR5301
namespace pr5301 {
void f(int, int = 0);
template <typename T>
void g(T, T = 0);
template <int I>
void i(int a = I);
template <typename T>
void h(T t) {
f(0);
g(1);
g(t);
i<2>();
}
void test() {
h(0);
}
}
// PR5810
namespace PR5810 {
template<typename T>
struct allocator {
allocator() { int a[sizeof(T) ? -1 : -1]; } // expected-error2 {{array size is negative}}
};
template<typename T>
struct vector {
vector(const allocator<T>& = allocator<T>()) {} // expected-note2 {{instantiation of}}
};
struct A { };
struct B { };
template<typename>
void FilterVTs() {
vector<A> Result;
}
void f() {
vector<A> Result;
}
template<typename T>
struct X {
vector<B> bs;
X() { }
};
void f2() {
X<float> x; // expected-note{{member function}}
}
}
template<typename T> void f4(T, int = 17);
template<> void f4<int>(int, int);
void f4_test(int i) {
f4(i);
}
// Instantiate for initialization
namespace InstForInit {
template<typename T>
struct Ptr {
typedef T* type;
Ptr(type);
};
template<typename T>
struct Holder {
Holder(int i, Ptr<T> ptr = 0);
};
void test_holder(int i) {
Holder<int> h(i);
}
};
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