forked from OSchip/llvm-project
147 lines
3.2 KiB
C++
147 lines
3.2 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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struct non_trivial {
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non_trivial();
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non_trivial(const non_trivial&);
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non_trivial& operator = (const non_trivial&);
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~non_trivial();
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};
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union u {
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non_trivial nt;
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};
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union u2 {
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non_trivial nt;
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int k;
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u2(int k) : k(k) {}
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u2() : nt() {}
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};
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union static_data_member {
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static int i;
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};
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int static_data_member::i;
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union bad {
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int &i; // expected-error {{union member 'i' has reference type 'int &'}}
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};
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struct s {
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union {
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non_trivial nt;
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};
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};
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// Don't crash on this.
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struct TemplateCtor { template<typename T> TemplateCtor(T); };
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union TemplateCtorMember { TemplateCtor s; };
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template<typename T> struct remove_ref { typedef T type; };
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template<typename T> struct remove_ref<T&> { typedef T type; };
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template<typename T> struct remove_ref<T&&> { typedef T type; };
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template<typename T> T &&forward(typename remove_ref<T>::type &&t);
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template<typename T> T &&forward(typename remove_ref<T>::type &t);
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template<typename T> typename remove_ref<T>::type &&move(T &&t);
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using size_t = decltype(sizeof(int));
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void *operator new(size_t, void *p) noexcept { return p; }
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namespace disabled_dtor {
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template<typename T>
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union disable_dtor {
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T val;
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template<typename...U>
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disable_dtor(U &&...u) : val(forward<U>(u)...) {}
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~disable_dtor() {}
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};
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struct deleted_dtor {
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deleted_dtor(int n, char c) : n(n), c(c) {}
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int n;
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char c;
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~deleted_dtor() = delete;
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};
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disable_dtor<deleted_dtor> dd(4, 'x');
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}
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namespace optional {
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template<typename T> struct optional {
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bool has;
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union { T value; };
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optional() : has(false) {}
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template<typename...U>
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optional(U &&...u) : has(true), value(forward<U>(u)...) {}
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optional(const optional &o) : has(o.has) {
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if (has) new (&value) T(o.value);
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}
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optional(optional &&o) : has(o.has) {
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if (has) new (&value) T(move(o.value));
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}
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optional &operator=(const optional &o) {
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if (has) {
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if (o.has)
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value = o.value;
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else
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value.~T();
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} else if (o.has) {
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new (&value) T(o.value);
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}
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has = o.has;
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}
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optional &operator=(optional &&o) {
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if (has) {
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if (o.has)
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value = move(o.value);
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else
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value.~T();
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} else if (o.has) {
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new (&value) T(move(o.value));
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}
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has = o.has;
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}
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~optional() {
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if (has)
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value.~T();
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}
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explicit operator bool() const { return has; }
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T &operator*() const { return value; }
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};
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optional<non_trivial> o1;
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optional<non_trivial> o2{non_trivial()};
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optional<non_trivial> o3{*o2};
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void f() {
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if (o2)
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o1 = o2;
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o2 = optional<non_trivial>();
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}
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}
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namespace pr16061 {
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struct X { X(); };
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template<typename T> struct Test1 {
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union {
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struct {
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X x;
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};
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};
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};
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template<typename T> struct Test2 {
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union {
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struct { // expected-note {{default constructor of 'Test2<pr16061::X>' is implicitly deleted because variant field '' has a non-trivial default constructor}}
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T x;
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};
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};
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};
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Test2<X> t2x; // expected-error {{call to implicitly-deleted default constructor of 'Test2<pr16061::X>'}}
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}
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