Include RE2 library

third_party/re2/re2/set.h

+// Copyright 2010 The RE2 Authors.  All Rights Reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef RE2_SET_H
+#define RE2_SET_H
+
+#include <utility>
+#include <vector>
+
+#include "re2/re2.h"
+
+namespace re2 {
+using std::vector;
+
+// An RE2::Set represents a collection of regexps that can
+// be searched for simultaneously.
+class RE2::Set {
+ public:
+  Set(const RE2::Options& options, RE2::Anchor anchor);
+  ~Set();
+
+  // Add adds regexp pattern to the set, interpreted using the RE2 options.
+  // (The RE2 constructor's default options parameter is RE2::UTF8.)
+  // Add returns the regexp index that will be used to identify
+  // it in the result of Match, or -1 if the regexp cannot be parsed.
+  // Indices are assigned in sequential order starting from 0.
+  // Error returns do not increment the index.
+  // If an error occurs and error != NULL, *error will hold an error message.
+  int Add(const StringPiece& pattern, string* error);
+
+  // Compile prepares the Set for matching.
+  // Add must not be called again after Compile.
+  // Compile must be called before FullMatch or PartialMatch.
+  // Compile may return false if it runs out of memory.
+  bool Compile();
+
+  // Match returns true if text matches any of the regexps in the set.
+  // If so, it fills v with the indices of the matching regexps.
+  bool Match(const StringPiece& text, vector<int>* v) const;
+
+ private:
+  RE2::Options options_;
+  RE2::Anchor anchor_;
+  vector<re2::Regexp*> re_;
+  re2::Prog* prog_;
+  bool compiled_;
+  //DISALLOW_EVIL_CONSTRUCTORS(Set);
+  Set(const Set&);
+  void operator=(const Set&);
+};
+
+}  // namespace re2
+
+#endif  // RE2_SET_H