std::tuple_element<std::tuple> (C++11) obtains the type of the specified element (class template specialization) std::uses_allocator<std::tuple> (C++11) specializes thestd::uses_allocatortype trait (class templ
using innervector_t = std::vector<int, myalloc<int>>; using elem_t = std::tuple<int, innervector_t>; using Alloc = std::scoped_allocator_adaptor< myalloc<elem_t>, myalloc<int>>; Alloc a(1,2); std::vector<elem_t, Alloc> v(a); v.resize(1); // 对 v 的元素用分配器 #1...
}/// reference: http://zh.cppreference.com/w/cpp/utility/tuplestaticstd::tuple<double,char, std::string>get_student(intid){if(id ==0)returnstd::make_tuple(3.8,'A',"Lisa Simpson");if(id ==1)returnstd::make_tuple(2.9,'C',"Milhouse Van Houten");if(id ==2)returnstd::make_tup...
Creates a tuple object, deducing the target type from the types of arguments. For each Ti in Types..., the corresponding type Vi in VTypes... is std::decay<Ti>::type unless application of std::decay results in std::reference_wrapper<X> for some type X, in which case the deduced ...
tuple_cat std::tuple_cat From cppreference.com Defined in header<tuple> template<class...Tuples> std::tuple</* CTypes */...>tuple_cat(Tuples&&...args); (since C++11) (until C++14) template<class...Tuples> constexprstd::tuple</* CTypes */...>tuple_cat(Tuples&&...args);...
std::tuple是c++11提供的新模板类,在很多流行语言都有对应的实现,一般翻译为元组。使用它可以把多个不同类型的变量组合成一个对象。 简单示例 以下是std::tuple的简单示例(来源:https://en.cppreference.com/w/cpp/utility/tuple) #include <tuple>
输出: score:3.8, name: 参考材料 https://en.cppreference.com/w/cpp/utility/tuple/tuple_cat 作者:半杯茶的小酒杯原文地址:http://www.banbeichadexiaojiubei.com/index.php/2020/10/05/c11%E6%96%B0%E7%89%B9%E6%80%A7-stdtuple/ 0 分享2020-10-06%s...
然后,std::_Tuple_impl 的每个递归层次都会继承一个基类 std::_Head_base 。这是因为 std::tuple 中每个节点都是由std::_Head_base 对象表示。比如之前的 t: 1是由 std::_Head_base<0, int> 对象表示; "Foo" 是由于 std::_Head_base<1, std::string> 对象表示; 3.14 是由 std::_Head_base<2...
std::tuple<double, char, std::string> get_student(int id){ // C++11构建tuple的写法 if (id == 0) return std::make_tuple(3.8, 'A', "Lisa Simpson"); // C++17提供了更方便的构建tuple的写法 //if (id == 0) return { 3.8, 'A', "Lisa Simpson" }; if (id == 1) return std...
over a std::tuple//遍历输出tuple元素的简洁方式(C++11)//Win32Con17_VS2017_01.cpp#include <...