120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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struct A { };
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A::A() { } // expected-error {{definition of implicitly declared default constructor}}
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struct B { };
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B::B(const B&) { } // expected-error {{definition of implicitly declared copy constructor}}
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struct C { };
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C& C::operator=(const C&) { return *this; } // expected-error {{definition of implicitly declared copy assignment operator}}
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struct D { };
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D::~D() { } // expected-error {{definition of implicitly declared destructor}}
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// Make sure that the special member functions are introduced for
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// name-lookup purposes and overload with user-declared
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// constructors and assignment operators.
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namespace PR6570 {
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class A { };
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class B {
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public:
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B() {}
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B(const A& a) {
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operator = (CONST);
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operator = (a);
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}
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B& operator = (const A& a) {
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return *this;
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}
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void f(const A &a) {
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B b(a);
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};
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static const B CONST;
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};
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}
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namespace PR7594 {
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// If the lazy declaration of special member functions is triggered
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// in an out-of-line initializer, make sure the functions aren't in
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// the initializer scope. This used to crash Clang:
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struct C {
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C();
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static C *c;
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};
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C *C::c = new C();
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}
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namespace Recursion {
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template<typename T> struct InvokeCopyConstructor {
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static const T &get();
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typedef decltype(T(get())) type; // expected-error {{no matching conver}}
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};
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struct B;
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struct A {
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// expected-note@-1 {{while substituting deduced template arguments}}
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typedef B type;
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template<typename T,
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typename = typename InvokeCopyConstructor<typename T::type>::type>
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// expected-note@-1 {{in instantiation of template class}}
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A(const T &);
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// expected-note@-1 {{in instantiation of default argument}}
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};
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struct B { // expected-note {{candidate constructor (the implicit move }}
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B(); // expected-note {{candidate constructor not viable}}
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A a;
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};
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// Triggering the declaration of B's copy constructor causes overload
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// resolution to occur for A's copying constructor, which instantiates
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// InvokeCopyConstructor<B>, which triggers the declaration of B's copy
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// constructor. Notionally, this happens when we get to the end of the
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// definition of 'struct B', so there is no declared copy constructor yet.
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//
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// This behavior is g++-compatible, but isn't exactly right; the class is
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// supposed to be incomplete when we implicitly declare its special members.
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B b = B();
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// Another case, which isn't ill-formed under our rules. This is inspired by
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// a problem which occurs when combining CGAL with libstdc++-4.7.
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template<typename T> T &&declval();
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template<typename T, typename U> struct pair {
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pair();
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template<typename V, typename W,
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typename = decltype(T(declval<const V&>())),
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typename = decltype(U(declval<const W&>()))>
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pair(const pair<V,W> &);
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};
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template<typename K> struct Line;
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template<typename K> struct Vector {
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Vector(const Line<K> &l);
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};
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template<typename K> struct Point {
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Vector<K> v;
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};
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template<typename K> struct Line {
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pair<Point<K>, Vector<K>> x;
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};
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// Trigger declaration of Line copy ctor, which causes substitution into
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// pair's templated constructor, which triggers instantiation of the
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// definition of Point's copy constructor, which performs overload resolution
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// on Vector's constructors, which requires declaring all of Line's
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// constructors. That should not find a copy constructor (because we've not
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// declared it yet), but by the time we get all the way back here, we should
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// find the copy constructor.
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Line<void> L1;
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Line<void> L2(L1);
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}
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