1 files changed, 82 insertions, 0 deletions
diff --git a/CIAO/CCF/CCF/CompilerElements/TokenStream.hpp b/CIAO/CCF/CCF/CompilerElements/TokenStream.hpp
new file mode 100644
index 00000000000..f1d3ab4fb8c
--- /dev/null
+++ b/CIAO/CCF/CCF/CompilerElements/TokenStream.hpp
@@ -0,0 +1,82 @@
+// file      : CCF/CompilerElements/TokenStream.hpp
+// author    : Boris Kolpackov <boris@dre.vanderbilt.edu>
+// cvs-id    : $Id$
+
+#ifndef CCF_COMPILER_ELEMENTS_TOKEN_STREAM_HPP
+#define CCF_COMPILER_ELEMENTS_TOKEN_STREAM_HPP
+
+#include <string>
+#include <istream>
+
+namespace CCF
+{
+  namespace CompilerElements
+  {
+    template <typename Token>
+    class TokenStream
+    {
+    public:
+      // (JP 06-04-06) Not required by C++ spec, but it
+      // eliminates buggy GCC warnings.
+      virtual ~TokenStream () {}
+
+      virtual Token
+      next () = 0;
+    };
+
+    template <>
+    class TokenStream<char>
+    {
+    public:
+      typedef
+      std::char_traits<char>
+      traits;
+
+      typedef
+      traits::int_type
+      int_type;
+
+      typedef
+      traits::char_type
+      char_type;
+
+    public:
+      virtual int_type
+      next () = 0;
+
+      static char_type
+      to_char_type (int_type i)
+      {
+        return traits::to_char_type (i);
+      }
+
+      static int_type
+      eos ()
+      {
+        return traits::eof ();
+      }
+    };
+
+    class InputStreamAdapter : public TokenStream<char>
+    {
+    public:
+      InputStreamAdapter (std::istream& is)
+          : is_ (is)
+      {
+      }
+
+    public:
+
+      virtual int_type
+      next ()
+      {
+        return is_.get ();
+      }
+
+    private:
+      std::istream& is_;
+    };
+  }
+}
+
+#endif // CCF_COMPILER_ELEMENTS_TOKEN_STREAM_HPP