boost-regex

This question already has answers here : Closed 7 years ago . Possible Duplicate: How to convert a number to string and vice versa in C++ How should I convert the boost::regex match result to other format, like integer with below code? string s = "abc123"; boost::regex expr("(\\s+)(\\d+)"); boost::smatch match; if(boost::regex_search(s, match, expr)) { string text(match[0]); // code to convert match[1] to integer } I'm sure you'd like to have string text(match[1]); // convert match[2] to integer instead, as match[0] is the whole matched thing (abc123 here), so submatch indexing starts at 1. As

Could someone explain the differences between the two? Which would be better to learn right now? How would knowledge transfer from one to the other and vice-versa? The boost regex library made it into C++0x so I'm guessing it will slowly be removed from boost. However, using boost is nice because you can still use it with compilers without C++0x support. So it's really up to you. One major difference is, that C++11 does not provide the Perl syntax for regular expressions. So, if you tend to use Perl syntax you have to use the Boost::Regex library. At least in Visual Studio 2013 this and

I am currently trying to compile a Contraction Hierachies implementation by KIT which requires Boost::Regex. The supplied Makefile already makes sure (and I have also double-checked this manually) that g++ is supplied with the -lboost_regex switch. If the library is not installed, g++ will complain. So I installed the library from my package sources and tried compiling again. This time I am getting a huge load of linker errors regarding Boost::Regex. Here is a short excerpt: main.o: In function `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::string>, std:

Following is the code snippet, the regex_replace dosn't work properly for character "+", I should not use special handling for the characters, but it should work properly. /*All headerfiles are available.*/ std::string charToHex(unsigned char c, bool bUpperCase); std::string urlEncode(const std::string& toEncode, bool bEncodeForwardSlash); std::string getEncodedUrl(const std::string& url){ std::string bktObjKey = ""; std::string urlEnc = url; boost::regex expression("^(([^:/?#]+):)?(//([^/?#:]*)(:\\d+)?)?([^?#]*)((\\?[^#]*))?(#(.*))?"); std::string::const_iterator start=url.begin(), end = url

I am trying to test (using boost::regex ) whether a line in a file contains only numeric entries seperated by spaces. I encountered an exception which I do not understand (see below). It would be great if someone could explain why it is thrown. Maybe I am doing something stupid here in my way of defining the patterns? Here is the code: // regex_test.cpp #include <string> #include <iostream> #include <boost/regex.hpp> using namespace std; using namespace boost; int main(){ // My basic pattern to test for a single numeric expression const string numeric_value_pattern = "(?:-|\\+)?[[:d:]]+\\.?[[

How can I find the index in a string that matches a boost regex? If you use boost::regex_match it's the whole string that's matching. Maybe you mean to use regex_search: void index(boost::regex& re,const std::string& input){ boost::match_results<std::string::const_iterator> what; boost::match_flag_type flags = boost::match_default; std::string::const_iterator s = input.begin(); std::string::const_iterator e = input.end(); while (boost::regex_search(s,e,what,re,flags)){ std::cout << what.position() << std::endl; std::string::difference_type l = what.length(); std::string::difference_type p =

So I inherited code written in C++ that uses the Boost library. I could compile (using Code Blocks) and run the code on Linux Ubuntu but when I ported it over to the mac and installed the boost library, I can compile it using code blocks (and specifying the location of the regex libraries) but it won't run. It just gives me the error: $ ./BLAH_PD dyld: Library not loaded: libboost_regex.dylib Referenced from: /Users/spinach/Desktop/B/BLAH/bin/Release/./BLAH_PD Reason: image not found Trace/BPT trap I'm not sure what to do next but any help would be greatly appreciated. David You need to set