我的关注升压拉姆达简易程序喷涌而出以下错误:升压的嵌套使用::绑定中的boost ::拉姆达不工作
maxInMap.cpp:29:71: instantiated from here /usr/include/boost/lambda/detail/function_adaptors.hpp:264:15: error: invalid initialization of reference of type ‘std::vector<int>&’ from expression of type ‘const std::vector<int>’
请帮我理解这个问题,因为它会帮助我在整个升压LAMBDA
#include <map>
#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/if.hpp>
#include <boost/lambda/algorithm.hpp>
#include <boost/lambda/bind.hpp>
using namespace std ;
using namespace boost ;
using namespace boost::lambda ;
int main()
{
map<int, vector<int> > intVecMap ;
int vecSizes[] = {3, 6, 2, 9, 5, 8, 1, 7, 10, 4} ;
for (int i = 0; i < 10; i++)
intVecMap[i] = vector<int>(vecSizes[i], i) ;
map<int, vector<int> >::const_iterator itr =
max_element(intVecMap.begin(), intVecMap.end(),
(bind(&vector<int>::size,
bind(&pair<int, vector<int> >::second, _1)) <
bind(&vector<int>::size,
bind(&pair<int, vector<int> >::second, _2)))) ;
if (itr == intVecMap.end())
cout << "Max Element function could not find any max :-(\n" ;
else
cout << "Max Index = "<<(*itr).first<<" Size = "<<(*itr).second.size()<<endl ;
return 0 ;
}
非常感谢乔纳森,确实是问题。 – user2751632
然后你应该接受答案 –