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      1 //===- llvm/TableGen/TableGenAction.h - defines TableGenAction --*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file defines the TableGenAction base class to be derived from by
     11 // tblgen tools.
     12 //
     13 //===----------------------------------------------------------------------===//
     14 
     15 #ifndef LLVM_TABLEGEN_TABLEGENACTION_H
     16 #define LLVM_TABLEGEN_TABLEGENACTION_H
     17 
     18 namespace llvm {
     19 
     20 class raw_ostream;
     21 class RecordKeeper;
     22 
     23 class TableGenAction {
     24 public:
     25   virtual ~TableGenAction() {}
     26 
     27   /// Perform the action using Records, and write output to OS.
     28   /// @returns true on error, false otherwise
     29   virtual bool operator()(raw_ostream &OS, RecordKeeper &Records) = 0;
     30 };
     31 
     32 }
     33 
     34 #endif
     35