1 files changed, 35 insertions, 0 deletions
diff --git a/poxml/antlr/antlr/TokenStreamBasicFilter.h b/poxml/antlr/antlr/TokenStreamBasicFilter.h
new file mode 100644
index 00000000..af172bc8
--- /dev/null
+++ b/poxml/antlr/antlr/TokenStreamBasicFilter.h
@@ -0,0 +1,35 @@
+#ifndef INC_TokenStreamBasicFilter_hpp__
+#define INC_TokenStreamBasicFilter_hpp__
+
+#include "antlr/config.h"
+#include "antlr/BitSet.h"
+#include "antlr/TokenStream.h"
+
+ANTLR_BEGIN_NAMESPACE(antlr)
+
+/** This object is a TokenStream that passes through all
+ *  tokens except for those that you tell it to discard.
+ *  There is no buffering of the tokens.
+ */
+class TokenStreamBasicFilter : public TokenStream {
+	/** The set of token types to discard */
+protected:
+	BitSet discardMask;
+
+	/** The input stream */
+protected:
+	TokenStream* input;
+
+public:
+	TokenStreamBasicFilter(TokenStream& input_);
+
+	void discard(int ttype);
+
+	void discard(const BitSet& mask);
+
+	RefToken nextToken();
+};
+
+ANTLR_END_NAMESPACE
+
+#endif //INC_TokenStreamBasicFilter_hpp__