std::is_trivially_copyable 是一元类型特征 (UnaryTypeTrait) 。 如果T 是可平凡复制 (TriviallyCopyable) 类型,那么提供的成员常量 value 等于true。对于其它任何类型,value 等于false。 如果std::remove_all_extents_t<T> 是不完整类型且并非(可有 cv 限定的)void ,那么行为未定义。 如果程序添加了 std...
is_trivially_copyable (C++11) checks if a type is trivially copyable (class template) is_default_constructibleis_trivially_default_constructibleis_nothrow_default_constructible (C++11)(C++11)(C++11) checks if a type has a default constructor ...
Extended Description Tested on various c++17 compatible versions on godbolt. Assuming cppreference is correct (https://en.cppreference.com/w/cpp/named_req/TriviallyCopyable) and my interpretation of their text is also correct. std::is_trivially_copyable_v doesn't follow the standard's definition...
代码语言:javascript 运行 AI代码解释 #include <type_traits> struct non_trivially_copyable { non_trivially_copyable(non_trivially_copyable const&) = delete; non_trivially_copyable& operator=(non_trivially_copyable const&) = delete; non_trivially_copyable(non_trivially_copyable &&) = delete; non_tri...
std::is_trivially_move_constructible_v<NoMove1>); static_assert(!std::is_nothrow_move_constructible_v<NoMove1>); struct NoMove2 { // Not move-constructible since the lvalue reference // can't bind to the rvalue argument NoMove2(NoMove2&) {} }; static_assert(!std::is_move_...
a default constructor(12.1), has no non-trivial default constructors, and is trivially copyable ...
问带引用的std::is_trivially_copyable<T>EN关于wchar_t 在C++标准中，wchar_t是宽字符类型，每个...
Trivially Copyable reference_wrapper VS 2015 C++17 N4279 insert_or_assign()/try_emplace() For map/unordered_map VS 2015 C++17 N4280 size(), empty(), data() VS 2015 C++17 N4366 Precisely Constraining unique_ptr Assignment VS 2015 C++17 N4389 bool_constant VS 2013 ...
2829 + (Function->getParamDecl(0)->getType()->isReferenceType() || 2830 + Decl->isTriviallyCopyable()); 2831 + }; 2832 + 2833 + if (llvm::none_of(Decl->methods(), IsDefaultedOperatorEqualEqual) && 2834 + llvm::none_of(Decl->friends(), [&](const FriendDecl *Friend) ...
is trivially copyablestd::cout<<"C: "<<std::is_trivially_copyable<C>::value<<std::endl;// cpp containers are not trivially copyablestd::cout<<"map: "<<std::is_trivially_copyable<std::map<int,int>>::value<<std::endl;std::cout<<"vec: "<<std::is_trivially_copyable<std::vector...