Re: [Boost-users] [Regex] Accessing match count

Subject: Re: [Boost-users] [Regex] Accessing match count
From: ninti_at_[hidden]
Date: 2010-03-10 08:47:42

The regexes in my previous post may be borked due to email client stripping stuff 
out. 
Let's just assume that regex_consonant and regex_vowel are well formed patterns. 
The code below seems to be getting closer. It returns a plausible count for 
number of matches of regex 'expression' in string 'word': 
 
 
string get_m(string word) 
{ 
    regex c("^" + regex_consonant); 
    regex v(regex_vowel + "$"); 
    string re = "(" + regex_vowel + "+" + regex_consonant + "+)"; 
    regex expression(re); 
 
    string replacement = ""; 
    word = regex_replace(word, c, replacement); 
    word = regex_replace(word, v, replacement); 
 
    boost::sregex_token_iterator itr(word.begin(), word.end(), expression); 
    boost::sregex_token_iterator end; 
 
    int size = 0; 
    for(; itr != end; ++itr) 
    { 
        size++; 
    } 
 
    string s; 
    stringstream out; 
    out << size; 
    s = out.str(); 
 
    return s; 
} 
 
 
Is boost::sregex_token_iterator the appropriate function for subsequently 
counting the number of matches found in a given string?  
 
Also, don't hold back on how bad this code is, I'm here to learn! 
 
Mick