C/C++ error C2027: 使用了未定义类型“std::tuple<SkPoint *,SkScalar *>” - C++ 中使用 std::tuple 需要包含头文件 <tuple>,如下: #include <tuple>
通过std::tuple_element获取元素类型。 template<typename Tuple> void Fun(Tuple& tp) { std::tuple_element<0,Tuple>::type first = std::get<0>(mytuple); std::tuple_element<1,Tuple>::type second = std::get<1>(mytuple); } 获取tuple中元素的个数: tuple t; int size = std::tuple_size...
1 std::vector<double> stockPrices; 2 ... 3 boost::tuple<size_t, size_t, double> best_buy = 4 getBestTransactDays(stockPrices); 5 6 size_t buyDay = boost::get<0>(best_buy); // Access 0th element 7 size_t sellDay = boost::get<1>(best_buy); // Access 1st element 8 ...
std::get(std::tuple) std::tuple_size<std::tuple> std::tuple_element<std::tuple> std::uses_allocator<std::tuple> std::ignore std::apply 库特性测试宏 (C++20) std::optional std::any std::variant 格式化库 (C++20) std::integer_sequence std::exchange std::make_from_tuple std::launder...
N3887 tuple_element_t VS 2015 N3891 Renaming shared_mutex (Timed) To shared_timed_mutex VS 2015 N3346 Minimal Container Element Requirements VS 2013 N3421 Transparent Operator Functors (less<>, etc.) VS 2013 N3655 Alias Templates For <type_traits> (decay_t, etc.) VS...
virgin_tmout记录timeout时的tuple信息 virgin_crash记录crash时的tuple信息 shm_id=shmget(IPC_PRIVATE, MAP_SIZE, IPC_CREAT | IPC_EXCL | 0600);………trace_bits=shmat(shm_id, NULL, 0); int shmget(key_t key, size_t size, int shmflg)申请共享...
return std::string("Hello from an unknown system!"); #endif } int main() { std::cout << say_hello() << std::endl; return EXIT_SUCCESS; } 如何操作 让我们构建一个对应的CMakeLists.txt实例,这将使我们能够根据目标操作系统有条件地编译源代码: ...
情况std::tuple 是类似的。这导致了以下问题:在C ++ 1Z中,是否有使用它的情况 std::make_pair 和std::make_tuple 而不是使用构造函数 std::pair 和std::tuple? 请考虑仅考虑纯C ++ 1Z代码(即无需与C ++ 14的向后兼容),并假设每个人都熟悉此C ++ 1Z功能。 看答案 在C ++ 1Z中,是否存在使用的情...
std::is_same<std::tuple_element_t<0,decltype(t1)>,std::tuple_element_t<1,decltype(t1)>>:...
N3887 tuple_element_t VS 2015 N3891 Renaming shared_mutex (Timed) To shared_timed_mutex VS 2015 N3346 Minimal Container Element Requirements VS 2013 N3421 Transparent Operator Functors (less<>, etc.) VS 2013 N3655 Alias Templates For <type_traits> (decay_t, etc.) VS...