std::tuple<T1,T2,...,Tn> 存的是每个数据类型都有存储 构造一个元组tuple C++11,需要指定模板参数;或者使用make_tuple。这个和std::pair其实很像 auto tup1 = std::tuple<int, float, char>(3, 4.2, 'z'); auto tup2 = std::make_tuple(3, 4.2, 'z'); C++17引入
#include <iostream> #include <tuple> #include <functional> std::tuple<int, int> f() // this function returns multiple values { int x = 5; return std::make_tuple(x, 7); // return {x,7}; in C++17 } int main() { // heterogeneous tuple construction int n = 1; auto t = std...
#include<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));...
地址在 github 上,https://github.com/jbeder/yaml-cpp yaml-cpp 是通过 CMake 来进行构建和编译的...,这代表从 build 上一层目录查找 CMakeLists.txt ,然后编译的文件都会存放在 build 文件夹,如果对编译的效果不满意,只要删除 build 文件就好了,其他源码目录并不受影响,这是...cmake 编译时的基本套路...
大佬还提到了几个常用也好用的co_await相关的函数。比如when_all<>(),会等待所有task的执行完毕,然后返回所有被调用函数的返回值的一个元组(Tuple)。 还有专门针对Error Handling的when_all_ready<>()。 还有使用C++加入的<ranges>的when_all_range<>(),和when_all_windowed()。前者全部执行,而后者是可以给定...
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...
make_tuple (C++11) creates a tuple object of the type defined by the argument types (function template) tie (C++11) creates a tuple of lvalue references or unpacks a tuple into individual objects (function template) forward_as_tuple (C++11) creates a tuple of forwarding references...
在Ubuntu中,Python.h头文件可以在"usr/include/pythonx.x"中找到,如果你安装了Anaconda,那么你在"${YOUR_ANACONDA_PATH}/anaconda3/include/pythonx.x"中也能找到一个。在使用时我们需要在CmakeLists.txt(使用CMAKE的话)或c_cpp_propertirs.json(使用VScode)中设定,以帮助程序找到Python.h并确定其版本。
#include <iostream> std::tuple<int, double, std::string> f() { return std::make_tuple(1, 2.3, "456"); } int main() { auto [x, y, z] = f(); std::cout << x << ", " << y << ", " << z << std::endl; return 0; } 关于auto 类型推导会在 auto ...
auto t = make_tuple( make_tuple(5), // first form make_pair(3, 'c'), // second make_tuple(1.0, 1, '1')); // third for (auto&& i : starmap(Callable{}, t)) { // ... }accumulateAdditional Requirements: Type return from functor (with reference removed) must be assignable....