forked from OSchip/llvm-project
332 lines
7.5 KiB
C++
332 lines
7.5 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// PR5057
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namespace test0 {
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namespace std {
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class X {
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public:
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template<typename T> friend struct Y;
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};
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}
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namespace std {
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template<typename T> struct Y {};
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}
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}
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namespace test1 {
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template<typename T> void f1(T) { } // expected-note{{here}}
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class X {
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template<typename T> friend void f0(T);
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template<typename T> friend void f1(T);
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};
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template<typename T> void f0(T) { }
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template<typename T> void f1(T) { } // expected-error{{redefinition}}
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}
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// PR4768
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namespace test2 {
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template<typename T> struct X0 {
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template<typename U> friend struct X0;
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};
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template<typename T> struct X0<T*> {
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template<typename U> friend struct X0;
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};
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template<> struct X0<int> {
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template<typename U> friend struct X0;
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};
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template<typename T> struct X1 {
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template<typename U> friend void f2(U);
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template<typename U> friend void f3(U);
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};
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template<typename U> void f2(U);
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X1<int> x1i;
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X0<int*> x0ip;
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template<> void f2(int);
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// FIXME: Should this declaration of f3 be required for the specialization of
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// f3<int> (further below) to work? GCC and EDG don't require it, we do...
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template<typename U> void f3(U);
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template<> void f3(int);
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}
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// PR5332
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namespace test3 {
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template <typename T> class Foo {
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template <typename U>
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friend class Foo;
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};
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Foo<int> foo;
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template<typename T, T Value> struct X2a;
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template<typename T, int Size> struct X2b;
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template<typename T>
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class X3 {
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template<typename U, U Value> friend struct X2a;
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// FIXME: the redeclaration note ends up here because redeclaration
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// lookup ends up finding the friend target from X3<int>.
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template<typename U, T Value> friend struct X2b; // expected-error {{template non-type parameter has a different type 'long' in template redeclaration}} \
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// expected-note {{previous non-type template parameter with type 'int' is here}}
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};
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X3<int> x3i; // okay
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X3<long> x3l; // expected-note {{in instantiation}}
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}
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// PR5716
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namespace test4 {
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template<typename> struct A {
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template<typename T> friend void f(const A<T>&);
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};
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template<typename T> void f(const A<T>&) {
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int a[sizeof(T) ? -1 : -1]; // expected-error {{array with a negative size}}
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}
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void f() {
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f(A<int>()); // expected-note {{in instantiation of function template specialization}}
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}
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}
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namespace test5 {
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class outer {
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class foo;
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template <typename T> friend struct cache;
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};
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class outer::foo {
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template <typename T> friend struct cache;
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};
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}
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// PR6022
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namespace PR6022 {
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template <class T1, class T2 , class T3 > class A;
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namespace inner {
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template<class T1, class T2, class T3, class T>
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A<T1, T2, T3>& f0(A<T1, T2, T3>&, T);
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}
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template<class T1, class T2, class T3>
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class A {
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template<class U1, class U2, class U3, class T>
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friend A<U1, U2, U3>& inner::f0(A<U1, U2, U3>&, T);
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};
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}
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namespace FriendTemplateDefinition {
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template<unsigned > struct int_c { };
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template<typename T>
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struct X {
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template<unsigned N>
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friend void f(X, int_c<N>) {
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int value = N;
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};
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};
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void test_X(X<int> x, int_c<5> i5) {
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f(x, i5);
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}
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}
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namespace PR7013a {
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template<class > struct X0
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{
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typedef int type;
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};
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template<typename > struct X1
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{
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};
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template<typename , typename T> struct X2
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{
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typename T::type e;
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};
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namespace N
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{
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template <typename = int, typename = X1<int> > struct X3
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{
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template <typename T1, typename T2, typename B> friend void op(X2<T1, T2>& , B);
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};
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template <typename Ch, typename Tr, typename B> void op(X2<Ch, Tr>& , B)
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{
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X2<int, Tr> s;
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}
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}
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int n()
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{
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X2<int, X0<int> > ngs;
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N::X3<> b;
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op(ngs, b);
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return 0;
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}
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}
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namespace PR7013b {
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template<class > struct X0
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{
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typedef int type;
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};
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template<typename > struct X1
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{
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};
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template<typename , typename T> struct X2
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{
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typename T::type e;
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};
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namespace N
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{
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template <typename = X1<int> > struct X3
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{
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template <typename T1, typename T2, typename B> friend void op(X2<T1, T2>& , B);
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};
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template <typename Ch, typename Tr, typename B> void op(X2<Ch, Tr>& , B)
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{
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X2<int, Tr> s;
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}
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}
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int n()
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{
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X2<int, X0<int> > ngs;
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N::X3<> b;
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op(ngs, b);
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return 0;
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}
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}
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namespace PR8649 {
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template<typename T, typename U, unsigned N>
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struct X {
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template<unsigned M> friend class X<T, U, M>; // expected-error{{partial specialization cannot be declared as a friend}}
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};
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X<int, float, 7> x;
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}
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// Don't crash, and error on invalid friend type template.
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namespace friend_type_template_no_tag {
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template <typename T> struct S {
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template <typename U> friend S<U>; // expected-error{{friend type templates must use an elaborated type}}
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};
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template struct S<int>;
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}
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namespace PR10660 {
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struct A {
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template <> friend class B; // expected-error{{extraneous 'template<>' in declaration of class 'B'}}
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};
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}
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namespace rdar11147355 {
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template <class T>
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struct A {
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template <class U> class B;
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template <class S> template <class U> friend class A<S>::B; // expected-warning {{dependent nested name specifier 'A<S>::' for friend template declaration is not supported; ignoring this friend declaration}}
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private:
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int n; // expected-note {{here}}
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};
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template <class S> template <class U> class A<S>::B {
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public:
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// FIXME: This should be permitted.
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int f(A<S*> a) { return a.n; } // expected-error {{private}}
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};
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A<double>::B<double> ab;
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A<double*> a;
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int k = ab.f(a); // expected-note {{instantiation of}}
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}
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namespace RedeclUnrelated {
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struct S {
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int packaged_task;
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template<typename> class future {
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template<typename> friend class packaged_task;
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};
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future<void> share;
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};
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}
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namespace PR12557 {
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template <typename>
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struct Foo;
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template <typename Foo_>
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struct Bar {
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typedef Foo_ Foo; // expected-note {{previous}}
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template <typename> friend struct Foo; // expected-error {{redefinition of 'Foo' as different kind of symbol}}
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};
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Bar<int> b;
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}
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namespace PR12585 {
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struct A { };
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template<typename> struct B {
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template<typename> friend class A::does_not_exist; // \
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// expected-error {{friend declaration of 'does_not_exist' does not match any declaration in 'PR12585::A'}}
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};
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struct C {
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template<typename> struct D;
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};
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template<typename> class E {
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int n;
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template<typename> friend struct C::D;
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};
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template<typename T> struct C::D {
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int f() {
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return E<int>().n;
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}
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};
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int n = C::D<void*>().f();
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struct F {
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template<int> struct G;
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};
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template<typename T> struct H {
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// FIXME: As with cases above, the note here is on an unhelpful declaration,
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// and should point to the declaration of G within F.
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template<T> friend struct F::G; // \
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// expected-error {{different type 'char' in template redeclaration}} \
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// expected-note {{previous}}
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};
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H<int> h1; // ok
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H<char> h2; // expected-note {{instantiation}}
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}
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// Ensure that we can still instantiate a friend function template
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// after the friend declaration is instantiated during the delayed
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// parsing of a member function, but before the friend function has
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// been parsed.
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namespace rdar12350696 {
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template <class T> struct A {
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void foo() {
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A<int> a;
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}
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template <class U> friend void foo(const A<U> & a) {
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int array[sizeof(T) == sizeof(U) ? -1 : 1]; // expected-error {{negative size}}
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}
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};
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void test() {
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A<int> b;
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foo(b); // expected-note {{in instantiation}}
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}
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}
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