ir_visitor.h

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #pragma once
  25 #ifndef IR_VISITOR_H
  26 #define IR_VISITOR_H
  27
  28 /**
  29  * Abstract base class of visitors of IR instruction trees
  30  */
  31 class ir_visitor {
  32 public:
  33    virtual ~ir_visitor()
  34    {
  35       /* empty */
  36    }
  37
  38    /**
  39     * \name Visit methods
  40     *
  41     * As typical for the visitor pattern, there must be one \c visit method for
  42     * each concrete subclass of \c ir_instruction.  Virtual base classes within
  43     * the hierarchy should not have \c visit methods.
  44     */
  45    /*@{*/
  46    virtual void visit(class ir_variable *) = 0;
  47    virtual void visit(class ir_label *) = 0;
  48    virtual void visit(class ir_function_signature *) = 0;
  49    virtual void visit(class ir_function *) = 0;
  50    virtual void visit(class ir_expression *) = 0;
  51    virtual void visit(class ir_dereference *) = 0;
  52    virtual void visit(class ir_assignment *) = 0;
  53    virtual void visit(class ir_constant *) = 0;
  54    /*@}*/
  55 };
  56
  57 #endif /* IR_VISITOR_H */