Re: [Boost-users] Using boost regex

From: John Maddock (john_at_[hidden])
Date: 2005-06-02 05:06:36

>Hello,I'm new to boost and regular expressions in general.I'm using 
>sregex_iterator (and the example provided in the documentation as a base) 
>to >search for all occurrences of "G0" in a string like these 
> >"M51DTnM54G0G1G1G1G1G1G1G1G1G1G1G1G1G1G0G1M54M54G1G0G1G0M54M54G1M54".I 
>tried to use for RE: "G0", "(G0)+" >and "(G0)", but it only finds 1 
>occurrence for "G0" when I expected to find 4. I also need to know the 
>position of each occurrence.Thanks in >advance.Tulio Cleber Bender

Unless you show us some code, there's no way we can tell what you're doing 
wrong.  You can get the position of each match like this:

int main()
{
boost::regex e("G0");
std::string 
t("M51DTnM54G0G1G1G1G1G1G1G1G1G1G1G1G1G1G0G1M54M54G1G0G1G0M54M54G1M54");
boost::sregex_iterator i(t.begin(), t.end(), e), j;
while(i != j)
{
std::cout << i->position() << std::endl;
++i;
}
}

which prints:

9
37
49
53

HTH,

John.