/[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 256 by ph10,
Wed Sep 19 08:57:53 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 325
+Line 331
  #include <string>
- #include <pcrecpparg.h>   // defines the Arg class
- // These aren't technically needed here, but we include them
- // anyway so folks who include pcrecpp.h don't have to include
- // all these other header files as well.
  #include <pcre.h>
+ #include <pcrecpparg.h>   // defines the Arg class
+ // This isn't technically needed here, but we include it
+ // anyway so folks who include pcrecpp.h don't have to.
  #include <pcre_stringpiece.h>
  namespace pcrecpp {
-Line 342 
 namespace pcrecpp {
+Line 347 
 namespace pcrecpp {
          (all_options_ & o) == o
  // We convert user-passed pointers into special Arg objects
- extern Arg no_arg;
+ PCRECPP_EXP_DECL Arg no_arg;
  /***** Compiling regular expressions: the RE class *****/
-Line 350 
 extern Arg no_arg;
+Line 355 
 extern Arg no_arg;
  // along with other options we put on top of pcre.
  // Only 9 modifiers, plus match_limit and match_limit_recursion,
  // are supported now.
- class RE_Options {
+ class PCRECPP_EXP_DEFN RE_Options {
   public:
    // constructor
    RE_Options() : match_limit_(0), match_limit_recursion_(0), all_options_(0) {}
-Line 482 
 static inline RE_Options EXTENDED() {
+Line 487 
 static inline RE_Options EXTENDED() {
  // Interface for regular expression matching.  Also corresponds to a
  // pre-compiled regular expression.  An "RE" object is safe for
  // concurrent use by multiple threads.
- class RE {
+ class PCRECPP_EXP_DEFN RE {
   public:
    // We provide implicit conversions from strings so that users can
    // pass in a string or a "const char*" wherever an "RE" is expected.
+   RE(const string& pat) { Init(pat, NULL); }
+   RE(const string& pat, const RE_Options& option) { Init(pat, &option); }
    RE(const char* pat) { Init(pat, NULL); }
-   RE(const char *pat, const RE_Options& option) { Init(pat, &option); }
+   RE(const char* pat, const RE_Options& option) { Init(pat, &option); }
-   RE(const string& pat) { Init(pat.c_str(), NULL); }
+   RE(const unsigned char* pat) {
-   RE(const string& pat, const RE_Options& option) { Init(pat.c_str(), &option); }
+     Init(reinterpret_cast<const char*>(pat), NULL);
+   }
+   RE(const unsigned char* pat, const RE_Options& option) {
+     Init(reinterpret_cast<const char*>(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 617 
 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 648 
 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 693 
 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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+Added in v.256

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