std::pair用于返回两个值,而std::tuple可以返回任意数量的值。 cpp #include <iostream> #include <utility> // for std::pair #include <tuple> // for std::tuple std::pair<int, std::string> processPair() { return std::make_pair(200, "Success"); } std::...
m_vIncomingQueue.push_back(std::make_pair(static_cast<SessionPacket*>(pPacket->clone()), collaborator));return; }// record the incoming packetif(m_pRecorder) m_pRecorder->storeIncoming(pPacket, collaborator);// execute an alternative packet handling path when this session is being// taken...
Example of std::pair #include <bits/stdc++.h>usingnamespacestd;intmain() {//define a pairpair<int, string>student;//create the pairstudent=make_pair(1,"XYZ");//extract memebers//.first extracts first memebercout<<"Roll: "<<student.first<<endl;//.second extracts second memebercout<<"...
const std::string& st_name = sm_info_->stateName(id).toStdString(); if (entry_callbacks_.count(st_name) > 0) { temp_res_future = (*entry_callbacks_.at(st_name))(action); futures_map.insert(std::make_pair(id, temp_res_future)); ...
Most directly, you can return a tuple or pair, e.g., given auto f(int a, int b) { return std::make_tuple(a, b); } Since C++11: 12 int a, b; std::tie(a, b) = f(1, 2); Since C++17: auto [a, b] = f(1, 2); // destructuring declaration http://en.cppreference...
{returnstd::make_unique<Session>(method, url, dnsServer, flag); }voidadd(Session& s) { s.start();check(curl_multi_add_handle(curlm_, s.handle()),"curl_multi_add_handle"); }voidremove(Session& s) {check(curl_multi_remove_handle(curlm_, s.handle()),"curl_multi_remove_handle")...
#include<bits/stdc++.h>usingnamespacestd; /*根据题意,依次检查每个条件是否成立即可。对于条件三,开一个数组 cnt 记录每一个字符的出现次数即可。*/ strings; intcnt[128];// 每个字符的出现次数 intmain{cin>> s; intn = s.length; // 条件一:长度为偶数if(n%2==1) {puts("No");return0;}...
+std::pair<OverloadedOperatorKind, StringRef> OperatorNames[] = { + std::make_pair(OO_EqualEqual, "=="), std::make_pair(OO_ExclaimEqual, "!="), + std::make_pair(OO_Less, "<"), std::make_pair(OO_GreaterEqual, ">="), ...
}// Data structure which contains the matches between formal and real parameters// First: formal parameter// Second: real parameterSmallVector<std::pair<GraphNode*, GraphNode*>,4> Parameters(F.arg_size());// Fetch the function arguments (formal parameters) into the data structureFunction::arg...
Or what if the result itself has several components? A common example of multiple return values is the use of thestd::pairtemplate with STLmaps. There are two common approaches to circumventing the restriction of returning only a single value. First, you can use extra reference or pointer pa...