forked from OSchip/llvm-project
522 lines
12 KiB
C++
522 lines
12 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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class X { };
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X operator+(X, X);
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void f(X x) {
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x = x + x;
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}
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struct Y;
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struct Z;
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struct Y {
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Y(const Z&);
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};
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struct Z {
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Z(const Y&);
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};
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Y operator+(Y, Y);
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bool operator-(Y, Y); // expected-note{{candidate function}}
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bool operator-(Z, Z); // expected-note{{candidate function}}
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void g(Y y, Z z) {
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y = y + z;
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bool b = y - z; // expected-error{{use of overloaded operator '-' is ambiguous}}
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}
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struct A {
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bool operator==(Z&); // expected-note 2{{candidate function}}
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};
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A make_A();
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bool operator==(A&, Z&); // expected-note 3{{candidate function}}
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void h(A a, const A ac, Z z) {
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make_A() == z; // expected-warning{{equality comparison result unused}}
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a == z; // expected-error{{use of overloaded operator '==' is ambiguous}}
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ac == z; // expected-error{{invalid operands to binary expression ('const A' and 'Z')}}
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}
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struct B {
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bool operator==(const B&) const;
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void test(Z z) {
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make_A() == z; // expected-warning{{equality comparison result unused}}
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}
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};
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// we shouldn't see warnings about self-comparison,
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// this is a member function, we dunno what it'll do
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bool i(B b)
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{
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return b == b;
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}
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enum Enum1 { };
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enum Enum2 { };
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struct E1 {
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E1(Enum1) { }
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};
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struct E2 {
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E2(Enum2);
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};
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// C++ [over.match.oper]p3 - enum restriction.
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float& operator==(E1, E2); // expected-note{{candidate function}}
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void enum_test(Enum1 enum1, Enum2 enum2, E1 e1, E2 e2, Enum1 next_enum1) {
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float &f1 = (e1 == e2);
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float &f2 = (enum1 == e2);
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float &f3 = (e1 == enum2);
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float &f4 = (enum1 == next_enum1); // expected-error{{non-const lvalue reference to type 'float' cannot bind to a temporary of type 'bool'}}
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}
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// PR5244 - Argument-dependent lookup would include the two operators below,
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// which would break later assumptions and lead to a crash.
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class pr5244_foo
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{
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pr5244_foo(int);
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pr5244_foo(char);
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};
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bool operator==(const pr5244_foo& s1, const pr5244_foo& s2); // expected-note{{candidate function}}
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bool operator==(char c, const pr5244_foo& s); // expected-note{{candidate function}}
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enum pr5244_bar
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{
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pr5244_BAR
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};
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class pr5244_baz
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{
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public:
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pr5244_bar quux;
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};
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void pr5244_barbaz()
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{
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pr5244_baz quuux;
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(void)(pr5244_BAR == quuux.quux);
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}
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struct PostInc {
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PostInc operator++(int);
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PostInc& operator++();
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};
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struct PostDec {
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PostDec operator--(int);
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PostDec& operator--();
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};
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void incdec_test(PostInc pi, PostDec pd) {
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const PostInc& pi1 = pi++;
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const PostDec& pd1 = pd--;
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PostInc &pi2 = ++pi;
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PostDec &pd2 = --pd;
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}
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struct SmartPtr {
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int& operator*();
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long& operator*() const volatile;
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};
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void test_smartptr(SmartPtr ptr, const SmartPtr cptr,
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const volatile SmartPtr cvptr) {
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int &ir = *ptr;
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long &lr = *cptr;
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long &lr2 = *cvptr;
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}
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struct ArrayLike {
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int& operator[](int);
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};
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void test_arraylike(ArrayLike a) {
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int& ir = a[17];
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}
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struct SmartRef {
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int* operator&();
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};
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void test_smartref(SmartRef r) {
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int* ip = &r;
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}
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bool& operator,(X, Y);
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void test_comma(X x, Y y) {
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bool& b1 = (x, y);
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X& xr = (x, x); // expected-warning {{expression result unused}}
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}
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struct Callable {
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int& operator()(int, double = 2.71828); // expected-note{{candidate function}}
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float& operator()(int, double, long, ...); // expected-note{{candidate function}}
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double& operator()(float); // expected-note{{candidate function}}
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};
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struct Callable2 {
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int& operator()(int i = 0);
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double& operator()(...) const;
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};
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struct DerivesCallable : public Callable {
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};
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void test_callable(Callable c, Callable2 c2, const Callable2& c2c,
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DerivesCallable dc) {
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int &ir = c(1);
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float &fr = c(1, 3.14159, 17, 42);
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c(); // expected-error{{no matching function for call to object of type 'Callable'}}
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double &dr = c(1.0f);
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int &ir2 = c2();
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int &ir3 = c2(1);
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double &fr2 = c2c();
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int &ir4 = dc(17);
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double &fr3 = dc(3.14159f);
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}
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typedef float FLOAT;
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typedef int& INTREF;
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typedef INTREF Func1(FLOAT, double);
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typedef float& Func2(int, double);
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struct ConvertToFunc {
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operator Func1*(); // expected-note 2{{conversion candidate of type 'INTREF (*)(FLOAT, double)'}}
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operator Func2&(); // expected-note 2{{conversion candidate of type 'float &(&)(int, double)'}}
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void operator()();
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};
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struct ConvertToFuncDerived : ConvertToFunc { };
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void test_funcptr_call(ConvertToFunc ctf, ConvertToFuncDerived ctfd) {
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int &i1 = ctf(1.0f, 2.0);
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float &f1 = ctf((short int)1, 1.0f);
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ctf((long int)17, 2.0); // expected-error{{call to object of type 'ConvertToFunc' is ambiguous}}
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ctf();
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int &i2 = ctfd(1.0f, 2.0);
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float &f2 = ctfd((short int)1, 1.0f);
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ctfd((long int)17, 2.0); // expected-error{{call to object of type 'ConvertToFuncDerived' is ambiguous}}
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ctfd();
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}
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struct HasMember {
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int m;
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};
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struct Arrow1 {
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HasMember* operator->();
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};
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struct Arrow2 {
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Arrow1 operator->(); // expected-note{{candidate function}}
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};
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void test_arrow(Arrow1 a1, Arrow2 a2, const Arrow2 a3) {
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int &i1 = a1->m;
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int &i2 = a2->m;
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a3->m; // expected-error{{no viable overloaded 'operator->'}}
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}
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struct CopyConBase {
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};
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struct CopyCon : public CopyConBase {
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CopyCon(const CopyConBase &Base);
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CopyCon(const CopyConBase *Base) {
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*this = *Base;
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}
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};
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namespace N {
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struct X { };
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}
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namespace M {
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N::X operator+(N::X, N::X);
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}
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namespace M {
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void test_X(N::X x) {
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(void)(x + x);
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}
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}
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struct AA { bool operator!=(AA&); };
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struct BB : AA {};
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bool x(BB y, BB z) { return y != z; }
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struct AX {
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AX& operator ->(); // expected-note {{declared here}}
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int b;
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};
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void m() {
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AX a;
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a->b = 0; // expected-error {{circular pointer delegation detected}}
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}
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struct CircA {
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struct CircB& operator->(); // expected-note {{declared here}}
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int val;
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};
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struct CircB {
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struct CircC& operator->(); // expected-note {{declared here}}
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};
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struct CircC {
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struct CircA& operator->(); // expected-note {{declared here}}
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};
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void circ() {
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CircA a;
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a->val = 0; // expected-error {{circular pointer delegation detected}}
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}
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// PR5360: Arrays should lead to built-in candidates for subscript.
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typedef enum {
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LastReg = 23,
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} Register;
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class RegAlloc {
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int getPriority(Register r) {
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return usepri[r];
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}
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int usepri[LastReg + 1];
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};
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// PR5546: Don't generate incorrect and ambiguous overloads for multi-level
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// arrays.
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namespace pr5546
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{
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enum { X };
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extern const char *const sMoveCommands[][2][2];
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const char* a() { return sMoveCommands[X][0][0]; }
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const char* b() { return (*(sMoveCommands+X))[0][0]; }
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}
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// PR5512 and its discussion
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namespace pr5512 {
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struct Y {
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operator short();
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operator float();
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};
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void g_test(Y y) {
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short s = 0;
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// DR507, this should be ambiguous, but we special-case assignment
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s = y;
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// Note: DR507, this is ambiguous as specified
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//s += y;
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}
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struct S {};
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void operator +=(int&, S);
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void f(S s) {
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int i = 0;
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i += s;
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}
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struct A {operator int();};
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int a;
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void b(A x) {
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a += x;
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}
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}
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// PR5900
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namespace pr5900 {
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struct NotAnArray {};
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void test0() {
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NotAnArray x;
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x[0] = 0; // expected-error {{does not provide a subscript operator}}
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}
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struct NonConstArray {
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int operator[](unsigned); // expected-note {{candidate}}
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};
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int test1() {
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const NonConstArray x = NonConstArray();
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return x[0]; // expected-error {{no viable overloaded operator[] for type}}
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}
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// Not really part of this PR, but implemented at the same time.
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struct NotAFunction {};
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void test2() {
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NotAFunction x;
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x(); // expected-error {{does not provide a call operator}}
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}
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}
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// Operator lookup through using declarations.
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namespace N {
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struct X2 { };
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}
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namespace N2 {
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namespace M {
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namespace Inner {
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template<typename T>
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N::X2 &operator<<(N::X2&, const T&);
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}
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using Inner::operator<<;
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}
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}
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void test_lookup_through_using() {
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using namespace N2::M;
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N::X2 x;
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x << 17;
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}
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namespace rdar9136502 {
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struct X {
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int i(); // expected-note{{possible target for call}}
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int i(int); // expected-note{{possible target for call}}
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};
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struct Y {
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Y &operator<<(int);
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};
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void f(X x, Y y) {
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y << x
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.i; // expected-error{{reference to non-static member function must be called; did you mean to call it with no arguments?}}
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}
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}
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namespace rdar9222009 {
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class StringRef {
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inline bool operator==(StringRef LHS, StringRef RHS) { // expected-error{{overloaded 'operator==' must be a binary operator (has 3 parameters)}}
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return !(LHS == RHS); // expected-error{{invalid operands to binary expression ('rdar9222009::StringRef' and 'rdar9222009::StringRef')}}
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}
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};
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}
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namespace PR11784 {
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struct A { A& operator=(void (*x)()); };
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void f();
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void f(int);
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void g() { A x; x = f; }
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}
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namespace test10 {
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struct A {
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void operator[](float (*fn)(int)); // expected-note 2 {{not viable: no overload of 'bar' matching 'float (*)(int)'}}
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};
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float foo(int);
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float foo(float);
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template <class T> T bar(T);
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template <class T, class U> T bar(U);
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void test(A &a) {
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a[&foo];
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a[foo];
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a[&bar<int>]; // expected-error {{no viable overloaded operator[]}}
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a[bar<int>]; // expected-error {{no viable overloaded operator[]}}
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// If these fail, it's because we're not letting the overload
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// resolution for operator| resolve the overload of 'bar'.
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a[&bar<float>];
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a[bar<float>];
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}
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}
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struct InvalidOperatorEquals {
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InvalidOperatorEquals operator=() = delete; // expected-error {{overloaded 'operator=' must be a binary operator}}
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};
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namespace PR7681 {
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template <typename PT1, typename PT2> class PointerUnion;
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void foo(PointerUnion<int*, float*> &Result) {
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Result = 1; // expected-error {{no viable overloaded '='}} // expected-note {{type 'PointerUnion<int *, float *>' is incomplete}}
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}
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}
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namespace PR14995 {
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struct B {};
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template<typename ...T> void operator++(B, T...) {}
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void f() {
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B b;
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b++; // ok
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++b; // ok
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}
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template<typename... T>
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struct C {
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void operator-- (T...) {}
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};
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void g() {
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C<int> postfix;
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C<> prefix;
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postfix--; // ok
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--prefix; // ok
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}
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struct D {};
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template<typename T> void operator++(D, T) {}
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void h() {
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D d;
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d++; // ok
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++d; // expected-error{{cannot increment value of type 'PR14995::D'}}
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}
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template<typename...T> struct E {
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void operator++(T...) {} // expected-error{{parameter of overloaded post-increment operator must have type 'int' (not 'char')}}
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};
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E<char> e; // expected-note {{in instantiation of template class 'PR14995::E<char>' requested here}}
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struct F {
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template<typename... T>
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int operator++ (T...) {}
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};
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int k1 = F().operator++(0, 0);
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int k2 = F().operator++('0');
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// expected-error@-5 {{overloaded 'operator++' must be a unary or binary operator}}
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// expected-note@-3 {{in instantiation of function template specialization 'PR14995::F::operator++<int, int>' requested here}}
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// expected-error@-4 {{no matching member function for call to 'operator++'}}
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// expected-note@-8 {{candidate template ignored: substitution failure}}
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// expected-error@-9 {{parameter of overloaded post-increment operator must have type 'int' (not 'char')}}
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// expected-note@-6 {{in instantiation of function template specialization 'PR14995::F::operator++<char>' requested here}}
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// expected-error@-7 {{no matching member function for call to 'operator++'}}
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// expected-note@-12 {{candidate template ignored: substitution failure}}
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} // namespace PR14995
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namespace ConversionVersusTemplateOrdering {
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struct A {
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operator short() = delete;
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template <typename T> operator T();
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} a;
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struct B {
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template <typename T> operator T();
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operator short() = delete;
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} b;
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int x = a;
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int y = b;
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}
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