diff options
Diffstat (limited to 'test/CXX/special/class.copy/p12-0x.cpp')
-rw-r--r-- | test/CXX/special/class.copy/p12-0x.cpp | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/test/CXX/special/class.copy/p12-0x.cpp b/test/CXX/special/class.copy/p12-0x.cpp new file mode 100644 index 0000000..17b3191 --- /dev/null +++ b/test/CXX/special/class.copy/p12-0x.cpp @@ -0,0 +1,216 @@ +// RUN: %clang_cc1 -std=c++11 -verify %s + +// expected-no-diagnostics + +template<typename T, bool B> struct trivially_copyable_check { + static_assert(B == __has_trivial_copy(T), ""); + static_assert(B == __is_trivially_constructible(T, T), ""); + static_assert(B == __is_trivially_constructible(T, const T &), ""); + static_assert(B == __is_trivially_constructible(T, T &&), ""); + typedef void type; +}; +template<typename T> using trivially_copyable = + typename trivially_copyable_check<T, true>::type; +template<typename T> using not_trivially_copyable = + typename trivially_copyable_check<T, false>::type; + +struct Trivial {}; +using _ = trivially_copyable<Trivial>; + +// A copy/move constructor for class X is trivial if it is not user-provided, +struct UserProvided { + UserProvided(const UserProvided &); +}; +using _ = not_trivially_copyable<UserProvided>; + +// its declared parameter type is the same as if it had been implicitly +// declared, +struct NonConstCopy { + NonConstCopy(NonConstCopy &) = default; +}; +using _ = not_trivially_copyable<NonConstCopy>; + +// class X has no virtual functions +struct VFn { + virtual void f(); +}; +using _ = not_trivially_copyable<VFn>; + +// and no virtual base classes +struct VBase : virtual Trivial {}; +using _ = not_trivially_copyable<VBase>; + +// and the constructor selected to copy/move each [direct subobject] is trivial +struct TemplateCtor { + template<typename T> TemplateCtor(T &); +}; +using _ = trivially_copyable<TemplateCtor>; +struct TemplateCtorMember { + TemplateCtor tc; +}; +using _ = trivially_copyable<TemplateCtorMember>; + +// We can select a non-trivial copy ctor even if there is a trivial one. +struct MutableTemplateCtorMember { + mutable TemplateCtor mtc; +}; +static_assert(!__is_trivially_constructible(MutableTemplateCtorMember, const MutableTemplateCtorMember &), ""); +static_assert(__is_trivially_constructible(MutableTemplateCtorMember, MutableTemplateCtorMember &&), ""); +struct MutableTemplateCtorMember2 { + MutableTemplateCtorMember2(const MutableTemplateCtorMember2 &) = default; + MutableTemplateCtorMember2(MutableTemplateCtorMember2 &&) = default; + mutable TemplateCtor mtc; +}; +static_assert(!__is_trivially_constructible(MutableTemplateCtorMember2, const MutableTemplateCtorMember2 &), ""); +static_assert(__is_trivially_constructible(MutableTemplateCtorMember2, MutableTemplateCtorMember2 &&), ""); + +// Both trivial and non-trivial special members. +struct TNT { + TNT(const TNT &) = default; // trivial + TNT(TNT &); // non-trivial + + TNT(TNT &&) = default; // trivial + TNT(const TNT &&); // non-trivial +}; + +static_assert(!__has_trivial_copy(TNT), "lie deliberately for gcc compatibility"); +static_assert(__is_trivially_constructible(TNT, TNT), ""); +static_assert(!__is_trivially_constructible(TNT, TNT &), ""); +static_assert(__is_trivially_constructible(TNT, const TNT &), ""); +static_assert(!__is_trivially_constructible(TNT, volatile TNT &), ""); +static_assert(__is_trivially_constructible(TNT, TNT &&), ""); +static_assert(!__is_trivially_constructible(TNT, const TNT &&), ""); +static_assert(!__is_trivially_constructible(TNT, volatile TNT &&), ""); + +// This has only trivial special members. +struct DerivedFromTNT : TNT {}; + +static_assert(__has_trivial_copy(DerivedFromTNT), ""); +static_assert(__is_trivially_constructible(DerivedFromTNT, DerivedFromTNT), ""); +static_assert(__is_trivially_constructible(DerivedFromTNT, DerivedFromTNT &), ""); +static_assert(__is_trivially_constructible(DerivedFromTNT, const DerivedFromTNT &), ""); +static_assert(!__is_trivially_constructible(DerivedFromTNT, volatile DerivedFromTNT &), ""); +static_assert(__is_trivially_constructible(DerivedFromTNT, DerivedFromTNT &&), ""); +static_assert(__is_trivially_constructible(DerivedFromTNT, const DerivedFromTNT &&), ""); +static_assert(!__is_trivially_constructible(DerivedFromTNT, volatile DerivedFromTNT &&), ""); + +// This has only trivial special members. +struct TNTMember { + TNT tnt; +}; + +static_assert(__has_trivial_copy(TNTMember), ""); +static_assert(__is_trivially_constructible(TNTMember, TNTMember), ""); +static_assert(__is_trivially_constructible(TNTMember, TNTMember &), ""); +static_assert(__is_trivially_constructible(TNTMember, const TNTMember &), ""); +static_assert(!__is_trivially_constructible(TNTMember, volatile TNTMember &), ""); +static_assert(__is_trivially_constructible(TNTMember, TNTMember &&), ""); +static_assert(__is_trivially_constructible(TNTMember, const TNTMember &&), ""); +static_assert(!__is_trivially_constructible(TNTMember, volatile TNTMember &&), ""); + +struct NCCTNT : NonConstCopy, TNT {}; + +static_assert(!__has_trivial_copy(NCCTNT), ""); +static_assert(!__is_trivially_constructible(NCCTNT, NCCTNT), ""); +static_assert(!__is_trivially_constructible(NCCTNT, NCCTNT &), ""); +static_assert(!__is_trivially_constructible(NCCTNT, const NCCTNT &), ""); +static_assert(!__is_trivially_constructible(NCCTNT, volatile NCCTNT &), ""); +static_assert(!__is_trivially_constructible(NCCTNT, NCCTNT &&), ""); +static_assert(!__is_trivially_constructible(NCCTNT, const NCCTNT &&), ""); +static_assert(!__is_trivially_constructible(NCCTNT, volatile NCCTNT &&), ""); + +struct TemplateCtorNoMove { + TemplateCtorNoMove(const TemplateCtorNoMove &) = default; + template<typename T> TemplateCtorNoMove(T &&); +}; +static_assert(__is_trivially_constructible(TemplateCtorNoMove, const TemplateCtorNoMove &), ""); +static_assert(!__is_trivially_constructible(TemplateCtorNoMove, TemplateCtorNoMove &&), ""); + +struct UseTemplateCtorNoMove { + TemplateCtorNoMove tcnm; +}; +static_assert(__is_trivially_constructible(UseTemplateCtorNoMove, const UseTemplateCtorNoMove &), ""); +static_assert(!__is_trivially_constructible(UseTemplateCtorNoMove, UseTemplateCtorNoMove &&), ""); + +struct TemplateCtorNoMoveSFINAE { + TemplateCtorNoMoveSFINAE(const TemplateCtorNoMoveSFINAE &) = default; + template<typename T, typename U = typename T::error> TemplateCtorNoMoveSFINAE(T &&); +}; +static_assert(__is_trivially_constructible(TemplateCtorNoMoveSFINAE, const TemplateCtorNoMoveSFINAE &), ""); +static_assert(__is_trivially_constructible(TemplateCtorNoMoveSFINAE, TemplateCtorNoMoveSFINAE &&), ""); + +struct UseTemplateCtorNoMoveSFINAE { + TemplateCtorNoMoveSFINAE tcnm; +}; +static_assert(__is_trivially_constructible(UseTemplateCtorNoMoveSFINAE, const UseTemplateCtorNoMoveSFINAE &), ""); +static_assert(__is_trivially_constructible(UseTemplateCtorNoMoveSFINAE, UseTemplateCtorNoMoveSFINAE &&), ""); + +namespace TrivialityDependsOnImplicitDeletion { + struct PrivateMove { + PrivateMove(const PrivateMove &) = default; + private: + PrivateMove(PrivateMove &&); + friend class Access; + }; + static_assert(__is_trivially_constructible(PrivateMove, const PrivateMove &), ""); + static_assert(!__is_trivially_constructible(PrivateMove, PrivateMove &&), ""); + + struct NoAccess { + PrivateMove pm; + // NoAccess's move would be deleted, so is suppressed, + // so moves of it use PrivateMove's copy ctor, which is trivial. + }; + static_assert(__is_trivially_constructible(NoAccess, const NoAccess &), ""); + static_assert(__is_trivially_constructible(NoAccess, NoAccess &&), ""); + struct TopNoAccess : NoAccess {}; + static_assert(__is_trivially_constructible(TopNoAccess, const TopNoAccess &), ""); + static_assert(__is_trivially_constructible(TopNoAccess, TopNoAccess &&), ""); + + struct Access { + PrivateMove pm; + // NoAccess's move would *not* be deleted, so is *not* suppressed, + // so moves of it use PrivateMove's move ctor, which is not trivial. + }; + static_assert(__is_trivially_constructible(Access, const Access &), ""); + static_assert(!__is_trivially_constructible(Access, Access &&), ""); + struct TopAccess : Access {}; + static_assert(__is_trivially_constructible(TopAccess, const TopAccess &), ""); + static_assert(!__is_trivially_constructible(TopAccess, TopAccess &&), ""); +} + +namespace TrivialityDependsOnDestructor { + class HasInaccessibleDestructor { ~HasInaccessibleDestructor() = default; }; + struct HasImplicitlyDeletedDestructor : HasInaccessibleDestructor {}; + struct HasImplicitlyDeletedCopyCtor : HasImplicitlyDeletedDestructor { + HasImplicitlyDeletedCopyCtor() = default; + template<typename T> HasImplicitlyDeletedCopyCtor(T &&); + // Copy ctor is deleted but trivial. + // Move ctor is suppressed. + HasImplicitlyDeletedCopyCtor(const HasImplicitlyDeletedCopyCtor&) = default; + HasImplicitlyDeletedCopyCtor(HasImplicitlyDeletedCopyCtor&&) = default; + }; + struct Test : HasImplicitlyDeletedCopyCtor { + Test(const Test&) = default; + Test(Test&&) = default; + }; + // Implicit copy ctor calls deleted trivial copy ctor. + static_assert(__has_trivial_copy(Test), ""); + // This is false because the destructor is deleted. + static_assert(!__is_trivially_constructible(Test, const Test &), ""); + // Implicit move ctor calls template ctor. + static_assert(!__is_trivially_constructible(Test, Test &&), ""); + + struct HasAccessibleDestructor { ~HasAccessibleDestructor() = default; }; + struct HasImplicitlyDefaultedDestructor : HasAccessibleDestructor {}; + struct HasImplicitlyDefaultedCopyCtor : HasImplicitlyDefaultedDestructor { + template<typename T> HasImplicitlyDefaultedCopyCtor(T &&); + // Copy ctor is trivial. + // Move ctor is trivial. + }; + struct Test2 : HasImplicitlyDefaultedCopyCtor {}; + // Implicit copy ctor calls trivial copy ctor. + static_assert(__has_trivial_copy(Test2), ""); + static_assert(__is_trivially_constructible(Test2, const Test2 &), ""); + // Implicit move ctor calls trivial move ctor. + static_assert(__is_trivially_constructible(Test2, Test2 &&), ""); +} |