std::initializer_list<T>类型的对象是轻量代理对象,提供对constT类型对象数组的访问(可能分配于只读内存)。 std::initializer_list对象在这些时候自动构造: 用花括号包围的初始化器列表来列表初始化一个对象,其中对应的构造函数接受一个std::initializer_list形参。
std::initializer_list<T>:: constT*begin()constnoexcept; (C++11 起) (C++14 起为constexpr) 获得指向初始化器列表首元素的指针。 若初始化器列表为空,则begin()与end()的值是未指定的,但一定相同。 参数 (无) 返回值 指向初始化器列表首元素的指针...
begin(std::initializer_list) end(std::initializer_list) Defined in header <iterator> template <class E> std::reverse_iterator<const E*> rbegin( std::initializer_list<E> il ); (since C++14) The overload of std::rbegin for initializer_list returns an std::reverse_iterator pointing at...
Returns the number of elements in the initializer list, i.e.std::distance(begin(), end()). Parameters (none) Return value the number of elements in the initializer list Complexity Constant Example Run this code #include <initializer_list>intmain(){static_assert(std::initializer_list{1,2,3...
テンプレート 例外 ヘッダ 名前付き要件 機能テストマクロ(C++20) 言語サポートライブラリ 型サポート−型特性(C++11) プログラムユーティリティ 関係比較演算子(C++20) numeric_limits−type_info initializer_list(C++11) コンセプトライブラリ(C++20) ...
initializer_list(C++11) Biblioteca de conceitos(C++20) Biblioteca de metaprogramming(C++11) Type traits(C++11) ratio(C++11) integer_sequencePredefinição:mark c++14 Biblioteca de diagnósticos basic_stacktracePredefinição:mark c++23
initializer_list(C++11) Coroutine support(C++20) Contract support(C++26) Concepts library(C++20) Diagnostics library Assertions−System error(C++11) Exception types−Error numbers basic_stacktrace(C++23) Debugging support(C++26) Memory management library ...
Macros de test de fonctionnalités (C++20) Bibliothèque du language Support des types − traits (C++11) Utilitaires Compratateurs relationels (C++20) numeric_limits − type_info initializer_list (C++11)Concepts (C++20) Diagnostics Utilitaires généraux Pointeur...
basic_string(std::initializer_list<CharT>init, constAllocator&alloc=Allocator()); (9)(desde C++11) Constrói nova cadeia a partir de uma variedade de fontes de dados e, opcionalmente, usando alocador utilizador fornecidoalloc. Original: ...
histogram.cc:(.text+0x778): undefined reference to `absl::strings_internal::AppendPieces(std::__cxx11::basic_string<char, std::char_traits, std::allocator >*, std::initializer_list<std::basic_string_view<char, std::char_traits > >)' collect2: error: ld returned 1 exit status CMake...