1 files changed, 49 insertions, 0 deletions
diff --git a/odb/emitter.hxx b/odb/emitter.hxx
new file mode 100644
index 0000000..f68253b
--- /dev/null
+++ b/odb/emitter.hxx
@@ -0,0 +1,49 @@
+// file      : odb/emitter.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v3; see accompanying LICENSE file
+
+#ifndef ODB_EMITTER_HXX
+#define ODB_EMITTER_HXX
+
+#include <string>
+#include <sstream>
+
+// Emit a code construct one line at a time.
+//
+struct emitter
+{
+  virtual void
+  pre ();
+
+  virtual void
+  line (const std::string&) = 0;
+
+  virtual void
+  post ();
+};
+
+// Send output line-by-line (std::endl marker) to the emitter.
+//
+class emitter_ostream: public std::ostream
+{
+public:
+  emitter_ostream (emitter& e): std::ostream (&buf_), buf_ (e) {}
+
+private:
+  class streambuf: public std::stringbuf
+  {
+  public:
+    streambuf (emitter& e): e_ (e) {}
+
+    virtual int
+    sync ();
+
+  private:
+    emitter& e_;
+  };
+
+  streambuf buf_;
+};
+
+#endif // ODB_EMITTER_HXX