template< class T > struct add_pointer; (C++11 起) 如果T 是可引用类型或(可有 cv 限定的) void,那么提供的成员 typedef type 是typename std::remove_reference<T>::type*。 否则,提供的成员 typedef type 是T。 如果程序添加了 std::add_pointer 的特化,那么行为未定义。 嵌套...
template<classT> structadd_pointer; (since C++11) IfTis areferenceable typeor (possibly cv-qualified)void, the member typedeftypeprovided istypenamestd::remove_reference<T>::type*. Otherwise, the member typedeftypeprovided isT. If the program adds specializations forstd::add_pointer, the behavior...
std::remove_pointer std::add_pointer std::remove_extent std::remove_all_extents std::aligned_storage std::aligned_union std::decay std::enable_if std::void_t std::conditional std::common_type std::common_reference std::underlying_type std::type_identity 注释 概念库 (C++20) 错误处理 动...
add_pointer 最后那类变成 T 类型自身的设计，是由于无法构成指向它的指针类型。第一个版本的重载是更...
std::add_const std::add_cv std::add_lvalue_reference std::add_pointer std::add_rvalue_reference std::add_volatile std::align std::aligned_alloc std::aligned_storage std::aligned_union std::alignment_of std::align_val_t std::allocate_shared std::allocator_arg std::allocator_arg_t std...
std::add_const std::add_cv std::add_lvalue_reference std::add_pointer std::add_rvalue_reference std::add_volatile std::align std::aligned_alloc std::aligned_storage std::aligned_union std::alignment_of std::align_val_t std::allocate_shared std::allocator_arg std::allocator_arg_t std...
std::add_const std::add_cv std::add_lvalue_reference std::add_pointer std::add_rvalue_reference std::add_volatile std::align std::aligned_alloc std::aligned_storage std::aligned_union std::alignment_of std::align_val_t std::allocate_shared std::allocator_arg std::allocator_arg_t std...
The language chains together the operator-> calls until the last one returns a pointer.”: https://stackoverflow.com/questions/8777845/overloading-member-access-operators Maybe it worth to add to this lesson: https://www.learncpp.com/cpp-tutorial/member-selection-with-pointers-and-references/ ...
3.1 fetch_add //T is integralT fetch_add(T v, memory_order m = memory_order_seq_cst)volatilenoexcept; T fetch_add(T v, memory_order m=memory_order_seq_cst) noexcept;//T is pointerT fetch_add(ptrdiff_t v, memory_order m = memory_order_seq_cst)volatilenoexcept; ...
std::is_integral:判断 T 是否为整型,这就像我们识别商品是否是某一类别的,例如,判断一件商品是否属于日常用品。 std::is_pointer:判断 T 是否为指针类型,类似于我们区分一种商品是否属于电子产品。 std::is_base_of:判断 Base 是否为 Derived 的基类,就像我们查看一个商品是否是另一个商品的配件或者相关产品。