结构体 Cpp 中的 struct 不同于 C 中的 struct,cpp 的 struct 被扩展为类似 class 的类说明符。 结构体是一系列成员元素的组合体,允许存储不同类型的数据项,成员变量可以是各种数据类型,包括整数、浮点数、字符串、其他结构体等,所以你可以根据需要定义自己的结构体来组织数据。 定义结构体 cpp structMyStruct{...
insert、emplacevector 更改容量时全部失效。否则只有在或于插入点后者(包括end())。 resizevector 更改容量时全部失效。否则只有end()与被擦除元素。 pop_back被擦除元素和end()。 成员类型 成员类型定义 value_typeT allocator_typeAllocator size_type无符号整数类型(通常是std::size_t) ...
insert_range(const_iterator position, R&& rg); constexpr iterator insert(const_iterator position, initializer_list<T> il); constexpr iterator erase(const_iterator position); constexpr iterator erase(const_iterator first, const_iterator last); constexpr void swap(vector&) noexcept( allocator_traits...
45Writer::WriteCallbackFunc cb) {46auto varint_len = multi::UVarint{static_cast<uint64_t>(buffer.size())};4748auto msg_bytes = std::make_shared<std::vector<uint8_t>>();49msg_bytes->reserve(varint_len.size() +buffer.size());50msg_bytes->insert(msg_bytes->end(),51std::make_...
insert,emplaceIf the vector changed capacity, all of them. If not, only those at or after the insertion point (includingend()). resizeIf the vector changed capacity, all of them. If not, onlyend()and any elements erased. pop_backThe element erased andend(). ...
inplace_vector(C++26) hive(C++26) map−multimap−set−multiset unordered_map(C++11) unordered_multimap(C++11) unordered_set(C++11) unordered_multiset(C++11) Container adaptors span(C++20)−mdspan(C++23) Iterators library Ranges library(C++20) ...
std::vector<T,Allocator>::insert C++ Containers library std::vector iterator insert(const_iterator pos,constT&value); (1)(constexpr since C++20) iterator insert(const_iterator pos, T&&value); (2)(since C++11) (constexpr since C++20) ...
<cpp |container |vector std::vector Member types Member functions vector::vector vector::~vector vector::operator= vector::assign vector::assign_range (C++23) vector::get_allocator Element access vector::at vector::operator[] vector::front ...
std::vector<std::uint8_t> v = {'t', 'r', 'u', 'e'}; json j = json::parse(v.begin(), v.end()); You may leave the iterators for the range [begin, end): std::vector<std::uint8_t> v = {'t', 'r', 'u', 'e'}; json j = json::parse(v); Custom data sou...
- T 必须从 *ranges::begin(rg) 向vector 可就位构造 (EmplaceConstructible) 。而且,T 必须向 vector 可移动插入 (MoveInsertable) 且T 必须满足可移动构造 (MoveConstructible) ,可移动赋值 (MoveAssignable) ,和可交换 (Swappable) 。否则,其行为未定义。 返回...