I'm trying to use some code that I wrote on another computer that splits a string into tokens. This code compiles fine. The code also works as intended on some other computers. I've managed to reduce the code down to the following:
#include <string> #include <boost/regex.hpp> typedef std::vector<std::string> token_t ; token_t generate_tokens(std::string raw_input){ //this function breaks a input string into tokens. So test 100 goes to 2 tokens "test" and "100". boost::regex re_splitter("\\s+"); //this uses the regex \s+ to find whitespace. The + finds one or more whitespace characters. boost::sregex_token_iterator iter(raw_input.begin(), raw_input.end(), re_splitter, -1); //this breaks the string using the regex re_splitter to split into tokens when that is found. boost::sregex_token_iterator j; //This is actually in the Boost examples, j is the equivalent of end. Yes this did also seem weird to me at first... token_t token_vector; unsigned int count = 0; while(iter != j) { token_vector.push_back(*iter); std::cout << *iter++ << std::endl; ++count; } return token_vector; } int main(){ std::string in; int amount = -1; std::cout << "action: "; std::getline(std::cin, in); boost::regex EXPR("^test \\d*(\\.\\d{1,2})?$"); bool format_matches = boost::regex_match(in, EXPR); token_t tokens = generate_tokens(in); if(format_matches){ amount = atoi(tokens.at(1).c_str()); } std::cout << "amount: " << amount << "\n"; return 0; } This compiles without errors or warnings using: g++ -Wall test.cpp -lboost_regex but when used at runtime providing the input test 100 the program fails.
action: test 100
a.out: /usr/local/include/boost/smart_ptr/shared_ptr.hpp:412: typename boost::detail::shared_ptr_traits::reference boost::shared_ptr::operator*() const [with T = boost::regex_traits_wrapper > >]: Assertion `px != 0' failed.
Aborted
I'm completely lost as to what is going on here. Is this a bug in in my code or in the library? Any advice for debugging this is greatly appreciated!
