replace_all does not allow to replace single chars

[anonymous]

Following code does not compile:

#include <string>
#include <boost/algorithm/string.hpp>

using namespace std;
using namespace boost;
using namespace boost::algorithm;

int main()
{
    string str = "abc";
    replace_all(str, 'a', 'A');
}

/usr/include/boost/algorithm/string/replace.hpp: In function 'void boost::algori
thm::replace_all(SequenceT&, const Range1T&, const Range2T&) [with SequenceT = s
td::string, Range1T = char, Range2T = char]':
x.cc:11:   instantiated from here
/usr/include/boost/algorithm/string/replace.hpp:654: error: no matching function
 for call to 'first_finder(const char&)'
/usr/include/boost/algorithm/string/replace.hpp:654: error: no matching function
 for call to 'const_formatter(const char&)'

[Pavol Droba]

'a' is not string-type supported by boost::range, therefore it is not a valid argument to function replace_all. Use "a" insteda.

[anonymous]

I agree that boost::range modification just to support this case may be undesirable. On the other hand it will be good to provide specialized version of replace_all() and other functions in this library, which are optimized for single characters. Please consider adding them.