troubleshooting Question

binary_search of a vector of structures: Windows compilation failure!

Avatar of mrwad99
mrwad99Flag for United Kingdom of Great Britain and Northern Ireland asked on
12 Comments1 Solution455 ViewsLast Modified:
Ah hello.

I am trying to carry out a binary search of a vector of structures.  The following code demonstrates my problem, which I have acquired from

#include <algorithm>
#include <vector>
#include <string>

using namespace std;

struct Human
	std::string name;

struct Comparator
   bool operator() ( const Human& lhs, const std::string& rhs )
      return < rhs;
   bool operator() ( const std::string& lhs, const Human& rhs )
      return lhs <;

int main(int argc, char * argv[])
	std::vector<Human> vec;
	std::string nameToFind = "ss";
	binary_search( vec.begin(), vec.end(), nameToFind, Comparator() );

	return 0;

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Now, on the linked SO question, the author states that it solved his problem.  However, on my VS2008, the code complains (works fine on Solaris):

bool Comparator::operator ()(const std::string &,const Human &)' : cannot convert parameter 1 from 'Human' to 'const std::string &'

I think this is a "feature" of the MS implementation of the STL...can anyone suggest a way to achieve this search so that it works on Windows please?

phoffricSoftware Engineering and Matlab Analyst

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