Question

How to search substring case insensitive in a string using search() and bind() in C++

Answer 1

#include <iostream>
#include <functional>
#include <algorithm>
#include <string>

using std::cout;
using std::endl;
using std::string;

using namespace std::placeholders;

char to_upper(char ch)
{
	std::locale local;

	return std::use_facet<std::ctype<char> >(local).toupper(ch);
}

int main()
{
	string s("C++C#JavaPythonPHP");
	string sub_s("python");

	string::iterator pos;

	pos = search(s.begin(), s.end(),           
		         sub_s.begin(), sub_s.end(),   
		         bind(std::equal_to<char>(),   
			     bind(to_upper, _1),
			     bind(to_upper, _2)));

	if (pos != s.end()) {
		cout << "found: " << sub_s << " in: " << s << endl;
	}
}

/*
run:

found: python in: C++C#JavaPythonPHP

*/

 

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