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POBoost regex not working as expected in my code
 

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  1. POBoost regex not working as expected in my code
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    <p>I just started using Boost::regex today and am quite a novice in Regular Expressions too. I have been using "The Regulator" and Expresso to test my regex and seem satisfied with what I see there, but transferring that regex to boost, does not seem to do what I want it to do. Any pointers to help me a solution would be most welcome. As a side question are there any tools that would help me test my regex against boost.regex?</p> <pre><code>using namespace boost; using namespace std; vector&lt;string&gt; tokenizer::to_vector_int(const string s) { regex re("\\d*"); vector&lt;string&gt; vs; cmatch matches; if( regex_match(s.c_str(), matches, re) ) { MessageBox(NULL, L"Hmmm", L"", MB_OK); // it never gets here for( unsigned int i = 1 ; i &lt; matches.size() ; ++i ) { string match(matches[i].first, matches[i].second); vs.push_back(match); } } return vs; } void _uttokenizer::test_to_vector_int() { vector&lt;string&gt; __vi = tokenizer::to_vector_int("0&lt;br/&gt;1"); for( int i = 0 ; i &lt; __vi.size() ; ++i ) INFO(__vi[i]); CPPUNIT_ASSERT_EQUAL(2, (int)__vi.size());//always fails } </code></pre> <p>Update (Thanks to Dav for helping me clarify my question): I was hoping to get a vector with 2 strings in them => "0" and "1". I instead never get a successful regex_match() (regex_match() always returns false) so the vector is always empty.</p> <p>Thanks '1800 INFORMATION' for your suggestions. The <code>to_vector_int()</code> method now looks like this, but it goes into a never ending loop (I took the code you gave and modified it to make it compilable) and find "0","","","" and so on. It never find the "1".</p> <pre><code>vector&lt;string&gt; tokenizer::to_vector_int(const string s) { regex re("(\\d*)"); vector&lt;string&gt; vs; cmatch matches; char * loc = const_cast&lt;char *&gt;(s.c_str()); while( regex_search(loc, matches, re) ) { vs.push_back(string(matches[0].first, matches[0].second)); loc = const_cast&lt;char *&gt;(matches.suffix().str().c_str()); } return vs; } </code></pre> <p>In all honesty I don't think I have still understood the basics of searching for a pattern and getting the matches. Are there any tutorials with examples that explains this?</p>
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    1. USossandcad
    1. USossandcad
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    3. VO
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      1. VTUpMod
    1. COIt'd help if you explained exactly what wasn't working as intended - what results do you get, what do you expect to get?
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      1. POBoost regex not working as expected in my code
      1. USAmber
    2. COThanks Dav. Hope I have added enough information with my question.
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      1. USossandcad
 

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