[Boost-users] Splitting string at whitespace

Subject: [Boost-users] Splitting string at whitespace
From: Florian Lindner (mailinglists_at_[hidden])
Date: 2014-06-16 09:34:18

Hello,

for some time now I've been trying to split a given string at whitespaces: 
"A B C" -> "A", "B", "C". I want to use boost/algorithm/string

#include "boost/algorithm/string/split.hpp"
#include "boost/algorithm/string/compare.hpp"

std::vector<std::string> tokenize(const std::string& text )
{    
  std::vector<std::string> tokens;
  boost::algorithm::split(tokens, text, boost::algorithm::is_equal(" "));
  return tokens;
}

but compilation on gcc 4.9.0 / boost 1.55.0 just gives:

test.cpp: In function 'std::vector<std::basic_string<char> > tokenize(const 
string&)':
test.cpp:40:71: error: no matching function for call to 
'boost::algorithm::is_equal::is_equal(const char [2])'
   boost::algorithm::split(tokens, text, boost::algorithm::is_equal(" "));
                                                                       ^
test.cpp:40:71: note: candidates are:
In file included from /usr/include/boost/algorithm/string/finder.hpp:24:0,
                 from /usr/include/boost/algorithm/string/split.hpp:17,
                 from test.cpp:7:
/usr/include/boost/algorithm/string/compare.hpp:34:16: note: 
boost::algorithm::is_equal::is_equal()
         struct is_equal
                ^
/usr/include/boost/algorithm/string/compare.hpp:34:16: note:   candidate 
expects 0 arguments, 1 provided
/usr/include/boost/algorithm/string/compare.hpp:34:16: note: 
boost::algorithm::is_equal::is_equal(const boost::algorithm::is_equal&)
/usr/include/boost/algorithm/string/compare.hpp:34:16: note:   no known 
conversion for argument 1 from 'const char [2]' to 'const 
boost::algorithm::is_equal&'

What is wrong there?

Thanks,
Florian