New common interface for backends to use

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7625 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 0 deletions

diff --git a/support/tools/TableGen/TableGenBackend.h b/support/tools/TableGen/TableGenBackend.h
new file mode 100644
index 0000000..b9e8c49
--- /dev/null
+++ b/support/tools/TableGen/TableGenBackend.h
@@ -0,0 +1,26 @@
+//===- TableGenBackend.h - Base class for TableGen Backends -----*- C++ -*-===//
+//
+// The TableGenBackend class is provided as a common interface for all TableGen
+// backends.  It provides useful services and an standardized interface.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TABLEGENBACKEND_H
+#define TABLEGENBACKEND_H
+
+#include <string>
+#include <iosfwd>
+
+struct TableGenBackend {
+
+  // run - All TableGen backends should implement the run method, which should
+  // be the main entry point.
+  virtual void run(std::ostream &OS) = 0;
+
+
+public:   // Useful helper routines...
+  void EmitSourceFileHeader(const std::string &Desc, std::ostream &OS) const;
+
+};
+
+#endif