432 lines
9.3 KiB
C++
432 lines
9.3 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++14
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friend class A; // expected-error {{'friend' used outside of class}}
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void f() { friend class A; } // expected-error {{'friend' used outside of class}}
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class C { friend class A; };
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class D { void f() { friend class A; } }; // expected-error {{'friend' used outside of class}}
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// PR5760
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namespace test0 {
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namespace ns {
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void f(int);
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}
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struct A {
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friend void ns::f(int a);
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};
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}
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// Test derived from LLVM's Registry.h
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namespace test1 {
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template <class T> struct Outer {
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void foo(T);
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struct Inner {
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friend void Outer::foo(T);
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};
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};
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void test() {
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(void) Outer<int>::Inner();
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}
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}
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// PR5476
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namespace test2 {
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namespace foo {
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void Func(int x);
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}
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class Bar {
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friend void ::test2::foo::Func(int x);
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};
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}
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// PR5134
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namespace test3 {
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class Foo {
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friend const int getInt(int inInt = 0) {}
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};
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}
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namespace test4 {
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class T4A {
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friend class T4B;
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public:
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T4A(class T4B *);
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protected:
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T4B *mB; // error here
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};
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class T4B {};
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}
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namespace rdar8529993 {
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struct A { ~A(); };
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struct B : A
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{
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template<int> friend A::~A(); // expected-error {{destructor cannot be declared as a template}}
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};
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}
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// PR7915
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namespace test5 {
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struct A;
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struct A1 { friend void A(); };
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struct B { friend void B(); };
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}
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// PR8479
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namespace test6_1 {
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class A {
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public:
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private:
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friend class vectorA;
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A() {}
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};
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class vectorA {
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public:
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vectorA(int i, const A& t = A()) {}
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};
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void f() {
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vectorA v(1);
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}
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}
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namespace test6_2 {
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template<class T>
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class vector {
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public:
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vector(int i, const T& t = T()) {}
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};
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class A {
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public:
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private:
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friend class vector<A>;
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A() {}
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};
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void f() {
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vector<A> v(1);
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}
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}
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namespace test6_3 {
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template<class T>
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class vector {
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public:
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vector(int i) {}
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void f(const T& t = T()) {}
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};
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class A {
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public:
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private:
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friend void vector<A>::f(const A&);
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A() {}
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};
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void f() {
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vector<A> v(1);
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v.f();
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}
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}
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namespace test7 {
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extern "C" {
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class X {
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friend int test7_f() { return 42; }
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};
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}
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}
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// PR15485
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namespace test8 {
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namespace ns1 {
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namespace ns2 {
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template<class T> void f(T t); // expected-note {{target of using declaration}}
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}
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using ns2::f; // expected-note {{using declaration}}
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}
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struct A { void f(); }; // expected-note 2{{target of using declaration}}
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struct B : public A { using A::f; }; // expected-note {{using declaration}}
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template<typename T> struct C : A { using A::f; }; // expected-note {{using declaration}}
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struct X {
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template<class T> friend void ns1::f(T t); // expected-error {{cannot befriend target of using declaration}}
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friend void B::f(); // expected-error {{cannot befriend target of using declaration}}
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friend void C<int>::f(); // expected-error {{cannot befriend target of using declaration}}
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};
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}
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// PR16423
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namespace test9 {
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class C {
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};
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struct A {
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friend void C::f(int, int, int) {} // expected-error {{friend function definition cannot be qualified with 'C::'}}
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};
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}
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namespace test10 {
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struct X {};
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extern void f10_a();
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extern void f10_a(X);
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struct A {
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friend void f10_a();
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friend void f10_b();
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friend void f10_c();
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friend void f10_d();
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friend void f10_a(X);
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friend void f10_b(X);
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friend void f10_c(X);
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friend void f10_d(X);
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};
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extern void f10_b();
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extern void f10_b(X);
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struct B {
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friend void f10_a();
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friend void f10_b();
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friend void f10_c();
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friend void f10_d();
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friend void f10_a(X);
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friend void f10_b(X);
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friend void f10_c(X);
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friend void f10_d(X);
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};
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extern void f10_c();
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extern void f10_c(X);
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// FIXME: Give a better diagnostic for the case where a function exists but is
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// not visible.
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void g(X x) {
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f10_a();
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f10_b();
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f10_c();
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f10_d(); // expected-error {{undeclared identifier}}
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::test10::f10_a();
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::test10::f10_b();
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::test10::f10_c();
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::test10::f10_d(); // expected-error {{no member named 'f10_d'}}
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f10_a(x);
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f10_b(x);
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f10_c(x);
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f10_d(x); // PR16597: expected-error {{undeclared identifier}}
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::test10::f10_a(x);
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::test10::f10_b(x);
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::test10::f10_c(x);
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::test10::f10_d(x); // expected-error {{no type named 'f10_d'}}
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}
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struct Y : X {
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friend void f10_d();
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friend void f10_d(X);
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};
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struct Z {
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operator X();
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friend void f10_d();
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friend void f10_d(X);
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};
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struct W {
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friend void f10_d(W);
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};
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void g(X x, Y y, Z z) {
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f10_d(); // expected-error {{undeclared identifier}}
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::test10::f10_d(); // expected-error {{no member named 'f10_d'}}
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// f10_d is visible to ADL in the second and third cases.
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f10_d(x); // expected-error {{undeclared identifier}}
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f10_d(y);
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f10_d(z);
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// No ADL here.
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::test10::f10_d(x); // expected-error {{no type named 'f10_d'}}
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::test10::f10_d(y); // expected-error {{no type named 'f10_d'}}
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::test10::f10_d(z); // expected-error {{no type named 'f10_d'}}
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}
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void local_externs(W w, X x, Y y) {
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extern void f10_d(); // expected-note {{candidate}}
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extern void f10_d(X); // expected-note {{candidate}}
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f10_d();
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f10_d(x);
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f10_d(y);
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f10_d(w); // expected-error {{no matching}}
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{
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int f10_d;
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f10_d(); // expected-error {{not a function}}
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f10_d(x); // expected-error {{not a function}}
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f10_d(y); // expected-error {{not a function}}
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}
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}
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void i(X x, Y y) {
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f10_d(); // expected-error {{undeclared identifier}}
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f10_d(x); // expected-error {{undeclared identifier}}
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f10_d(y);
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}
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struct C {
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friend void f10_d();
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friend void f10_d(X);
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};
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void j(X x, Y y) {
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f10_d(); // expected-error {{undeclared identifier}}
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f10_d(x); // expected-error {{undeclared identifier}}
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f10_d(y);
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}
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extern void f10_d();
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extern void f10_d(X);
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void k(X x, Y y, Z z) {
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// All OK now.
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f10_d();
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f10_d(x);
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::test10::f10_d();
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::test10::f10_d(x);
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::test10::f10_d(y);
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::test10::f10_d(z);
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}
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}
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namespace test11 {
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class __attribute__((visibility("hidden"))) B;
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class A {
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friend class __attribute__((visibility("hidden"), noreturn)) B; // expected-warning {{'noreturn' attribute only applies to functions and methods}}
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};
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}
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namespace pr21851 {
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// PR21851 was a problem where we assumed that when the friend function redecl
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// lookup found a C++ method, it would necessarily have a qualifier. Below we
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// have some test cases where unqualified lookup finds C++ methods without using
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// qualifiers. Unfortunately, we can't exercise the case of an access check
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// failure because nested classes always have access to the members of outer
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// classes.
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void friend_own_method() {
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class A {
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void m() {}
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friend void m();
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};
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}
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void friend_enclosing_method() {
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class A;
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class C {
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int p;
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friend class A;
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};
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class A {
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void enclosing_friend() {
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(void)b->p;
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(void)c->p;
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}
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class B {
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void b(A *a) {
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(void)a->c->p;
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}
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int p;
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friend void enclosing_friend();
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};
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B *b;
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C *c;
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};
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}
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static auto friend_file_func() {
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extern void file_scope_friend();
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class A {
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int p;
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friend void file_scope_friend();
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};
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return A();
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}
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void file_scope_friend() {
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auto a = friend_file_func();
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(void)a.p;
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}
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}
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template<typename T>
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struct X_pr6954 {
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operator int();
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friend void f_pr6954(int x);
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};
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int array0_pr6954[sizeof(X_pr6954<int>)];
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int array1_pr6954[sizeof(X_pr6954<float>)];
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void g_pr6954() {
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f_pr6954(5); // expected-error{{undeclared identifier 'f_pr6954'}}
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}
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namespace tag_redecl {
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namespace N {
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struct X *p;
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namespace {
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class K {
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friend struct X;
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};
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}
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}
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namespace N {
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struct X;
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X *q = p;
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}
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}
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namespace default_arg {
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void f();
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void f(void*); // expected-note {{previous}}
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struct X {
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friend void f(int a, int b = 0) {}
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friend void f(void *p = 0) {} // expected-error {{must be the only}}
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};
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}
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namespace PR33222 {
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int f();
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template<typename T> struct X {
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friend T f();
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};
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X<int> xi;
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int g(); // expected-note {{previous}}
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template<typename T> struct Y {
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friend T g(); // expected-error {{return type}}
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};
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Y<float> yf; // expected-note {{instantiation}}
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int h(); // expected-note {{previous}}
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template<typename T> struct Z {
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friend T h(); // expected-error {{return type}}
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};
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Z<int> zi;
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Z<float> zf; // expected-note {{instantiation}}
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}
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namespace qualified_friend_no_match {
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void f(int); // expected-note {{type mismatch at 1st parameter}}
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template<typename T> void f(T*); // expected-note {{could not match 'type-parameter-0-0 *' against 'double'}}
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struct X {
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friend void qualified_friend_no_match::f(double); // expected-error {{friend declaration of 'f' does not match any declaration in namespace 'qualified_friend_no_match'}}
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friend void qualified_friend_no_match::g(); // expected-error {{friend declaration of 'g' does not match any declaration in namespace 'qualified_friend_no_match'}}
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};
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struct Y {
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void f(int); // expected-note {{type mismatch at 1st parameter}}
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template<typename T> void f(T*); // expected-note {{could not match 'type-parameter-0-0 *' against 'double'}}
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};
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struct Z {
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friend void Y::f(double); // expected-error {{friend declaration of 'f' does not match any declaration in 'qualified_friend_no_match::Y'}}
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};
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}
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