/[pcre]/code/trunk/pcrecpp.h

Diff of /code/trunk/pcrecpp.h

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-revision 87 by nigel,
Sat Feb 24 21:41:21 2007 UTC
+revision 93 by nigel,
Sat Feb 24 21:41:42 2007 UTC
 Line 112
  //    T             (where "bool T::ParseFrom(const char*, int)" exists)
  //    NULL          (the corresponding matched sub-pattern is not copied)
  //
+ // CAVEAT: An optional sub-pattern that does not exist in the matched
+ // string is assigned the empty string.  Therefore, the following will
+ // return false (because the empty string is not a valid number):
+ //    int number;
+ //    pcrecpp::RE::FullMatch("abc", "[a-z]+(\\d+)?", &number);
+ //
  // -----------------------------------------------------------------------
  // DO_MATCH
  //
-Line 488 
 class RE {
+Line 494 
 class RE {
    // pass in a string or a "const char*" wherever an "RE" is expected.
    RE(const char* pat) { Init(pat, NULL); }
    RE(const char *pat, const RE_Options& option) { Init(pat, &option); }
-   RE(const string& pat) { Init(pat.c_str(), NULL); }
+   RE(const string& pat) { Init(pat, NULL); }
-   RE(const string& pat, const RE_Options& option) { Init(pat.c_str(), &option); }
+   RE(const string& pat, const RE_Options& option) { Init(pat, &option); }
+   // Copy constructor & assignment - note that these are expensive
+   // because they recompile the expression.
+   RE(const RE& re) { Init(re.pattern_, &re.options_); }
+   const RE& operator=(const RE& re) {
+     if (this != &re) {
+       Cleanup();
+       // This is the code that originally came from Google
+       // Init(re.pattern_.c_str(), &re.options_);
+       // This is the replacement from Ari Pollak
+       Init(re.pattern_, &re.options_);
+     }
+     return *this;
+   }
    ~RE();
-Line 589 
 class RE {
+Line 612 
 class RE {
                 const StringPiece &text,
                 string *out) const;
+   // Escapes all potentially meaningful regexp characters in
+   // 'unquoted'.  The returned string, used as a regular expression,
+   // will exactly match the original string.  For example,
+   //           1.5-2.0?
+   // may become:
+   //           1\.5\-2\.0\?
+   static string QuoteMeta(const StringPiece& unquoted);
    /***** Generic matching interface *****/
    // Type of match (TODO: Should be restructured as part of RE_Options)
-Line 611 
 class RE {
+Line 643 
 class RE {
   private:
-   void Init(const char* pattern, const RE_Options* options);
+   void Init(const string& pattern, const RE_Options* options);
+   void Cleanup();
    // Match against "text", filling in "vec" (up to "vecsize" * 2/3) with
    // pairs of integers for the beginning and end positions of matched
-Line 655 
 class RE {
+Line 688 
 class RE {
    pcre*         re_full_;       // For full matches
    pcre*         re_partial_;    // For partial matches
    const string* error_;         // Error indicator (or points to empty string)
-   // Don't allow the default copy or assignment constructors --
-   // they're expensive and too easy to do by accident.
-   RE(const RE&);
-   void operator=(const RE&);
  };
  }   // namespace pcrecpp

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