Issue 4125 - [emscripten] Convert filter classes to C++

compiled/RegExpFilter.h

+#ifndef ADBLOCK_PLUS_REG_EXP_FILTER_H
+#define ADBLOCK_PLUS_REG_EXP_FILTER_H
+
+#include <string>
+
+#include "Filter.h"
+#include "ActiveFilter.h"
+
+class RegExpFilter : public ActiveFilter
+{
+private:
+  enum TrippleState {YES, NO, ANY};
+
+  int regexpId;
+  std::u16string regexpSource;
+  int contentType;
+  bool matchCase;
+  TrippleState thirdParty;
+  TrippleState collapse;
+  void ProcessOption(const std::u16string& options, int optionStart,
+      int optionEnd, int valueStart, int valueEnd);
+public:
+  explicit RegExpFilter(const std::u16string& text, const std::u16string& pattern,
+      const std::u16string& options);
+  ~RegExpFilter();
+  static Filter* Create(const std::u16string& text);
+  static void InitJSTypes();
+  static const std::u16string RegExpFromSource(const std::u16string& source);
+  Type GetType() const;
+  bool Matches(const std::u16string& location, int typeMask,
+      const std::u16string& docDomain, bool thirdParty,
+      const std::u16string& sitekey);
+};
+
+#endif