我们其实可以用大括号{}作为初始化列表来初始化一个tuple。或者,如果你可以保证每个分支返回的tuple都是同样的类型,那么你可以用auto来自动推断这个类型,而且再使用CTAD简化一下代码。 std::tuple<bool, int> foo(int i) { if (i > 0) { return {true, i}; } else { return {false, -i}
If this weren't true, we'd have to track the tuple (IP,SP,BSP) to uniquely identify the stack frame that's handling the exception. */ if (unw_get_reg (&context.cursor, UNW_REG_IP, &ip) < 0) return _URC_FATAL_PHASE1_ERROR; exception_object->private_1 = 0; /* clear "stop...
"add_numbers");if(pFunc&&PyCallable_Check(pFunc)){// 准备参数PyObject*pArgs=PyTuple_New(2);PyTuple_SetItem(pArgs,0,PyLong_FromLong(2));PyTuple
test_tupleproof(18,6.5, lengthy,"Ciao!"); lengthy =std::get<0>(proof);// 把'lengthy' 赋值为18.std::get<3>(proof) =" Beautiful!";// 修改元组的第四个元素 1.13,常量constexpr 保证函数或者对象构造函数在编译器常量 constexprintGetFive(){return5;}intsome_value[GetFive() +7]; 產生12...
return false; } PyObject* pResult = nullptr; //创建一个获取结果的python数据结构 PyObject* args = PyTuple_New((int)paras.size());//建立一个存放入参的python数据结构 for (int i = 0; i < (int)paras.size(); i++) { PyTuple_SetItem(args, i, PyLong_FromLong(paras[i])); //将...
<tuple>#include<string>#include<vector>intmain(intargc,constchar**argv){std::tuple<int,int,int>a(10,20,30); std::tuple<std::string, std::vector<int>, std::pair<std::string,int>>b("hello", std::vector<int>({1,2,3}), std::make_pair<std::string,int>("123",4));return0...
auto func = [&](int a){return a+i;}; 在C++14中,对此进行优化,lambda表达式参数可以直接是auto: auto i = 1; auto func = [&](auto a){return a+i;}; 变量模板 C++14支持变量模板: template<classT>constexprTpi=T(3.14156);printf("%d\n",pi<int>);// 3printf("%lf\n",pi<double>)...
std::basic_string::resize_and_overwrite (P1072R10) Rvalue reference overload of std::basic_string::substr for efficient slicing (P2438R2) Formatting ranges, tuples, escaped presentation of characters and strings, std::thread::id, and stacktraces. (P2286R8) (P2585R1) (P2693R1) I...
std::tuple<int,int>foo_tuple(){return{1,-1};// Error until N4387returnstd::tuple<int,int>{1,-1};// Always worksreturnstd::make_tuple(1,-1);// Always works} Example Run this code #include <iostream>#include <stdexcept>#include <string>#include <tuple>std::tuple<double,char,std...
tuple 可以存储不同的数据类型 list 适合经常插入,经常删除的情况 list 容器 -list容器是无序容器 -list 容器只能通过迭代器访问。通过++ -- 遍历 -list容器可以使用remove()方法删除元素, -可以同时正向和反向查找 -可以使用sort()函数排序 -可以使用merge 合并,但是合并之前必须排序 ...