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  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. /**
  25.  * \file ir_rvalue_visitor.h
  26.  *
  27.  * Generic class to implement the common pattern we have of wanting to
  28.  * visit each ir_rvalue * and possibly change that node to a different
  29.  * class.  Just implement handle_rvalue() and you will be called with
  30.  * a pointer to each rvalue in the tree.
  31.  */
  32.  
  33. class ir_rvalue_base_visitor : public ir_hierarchical_visitor {
  34. public:
  35.    ir_visitor_status rvalue_visit(ir_assignment *);
  36.    ir_visitor_status rvalue_visit(ir_call *);
  37.    ir_visitor_status rvalue_visit(ir_dereference_array *);
  38.    ir_visitor_status rvalue_visit(ir_dereference_record *);
  39.    ir_visitor_status rvalue_visit(ir_expression *);
  40.    ir_visitor_status rvalue_visit(ir_if *);
  41.    ir_visitor_status rvalue_visit(ir_return *);
  42.    ir_visitor_status rvalue_visit(ir_swizzle *);
  43.    ir_visitor_status rvalue_visit(ir_texture *);
  44.  
  45.    virtual void handle_rvalue(ir_rvalue **rvalue) = 0;
  46. };
  47.  
  48. class ir_rvalue_visitor : public ir_rvalue_base_visitor {
  49. public:
  50.  
  51.    virtual ir_visitor_status visit_leave(ir_assignment *);
  52.    virtual ir_visitor_status visit_leave(ir_call *);
  53.    virtual ir_visitor_status visit_leave(ir_dereference_array *);
  54.    virtual ir_visitor_status visit_leave(ir_dereference_record *);
  55.    virtual ir_visitor_status visit_leave(ir_expression *);
  56.    virtual ir_visitor_status visit_leave(ir_if *);
  57.    virtual ir_visitor_status visit_leave(ir_return *);
  58.    virtual ir_visitor_status visit_leave(ir_swizzle *);
  59.    virtual ir_visitor_status visit_leave(ir_texture *);
  60. };
  61.  
  62. class ir_rvalue_enter_visitor : public ir_rvalue_base_visitor {
  63. public:
  64.  
  65.    virtual ir_visitor_status visit_enter(ir_assignment *);
  66.    virtual ir_visitor_status visit_enter(ir_call *);
  67.    virtual ir_visitor_status visit_enter(ir_dereference_array *);
  68.    virtual ir_visitor_status visit_enter(ir_dereference_record *);
  69.    virtual ir_visitor_status visit_enter(ir_expression *);
  70.    virtual ir_visitor_status visit_enter(ir_if *);
  71.    virtual ir_visitor_status visit_enter(ir_return *);
  72.    virtual ir_visitor_status visit_enter(ir_swizzle *);
  73.    virtual ir_visitor_status visit_enter(ir_texture *);
  74. };
  75.