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// $Id$
/* -*- c++ -*- */
// ============================================================================
//
// = LIBRARY
// TAO_IDL_FE_DLL
//
// = FILENAME
// ast_visitor.h
//
// = DESCRIPTION
// The abstract AST visitor base class.
//
// = AUTHOR
// Jeff Parsons <parsons@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_IDL_FE_DLL_AST_VISITOR_H
#define TAO_IDL_FE_DLL_AST_VISITOR_H
#include "TAO_IDL_FE_Export.h"
class AST_Decl;
class UTL_Scope;
class AST_Type;
class AST_PredefinedType;
class AST_Module;
class AST_Interface;
class AST_InterfaceFwd;
class AST_ValueBox;
class AST_ValueType;
class AST_ValueTypeFwd;
class AST_Component;
class AST_ComponentFwd;
class AST_EventType;
class AST_EventTypeFwd;
class AST_Home;
class AST_Factory;
class AST_Structure;
class AST_StructureFwd;
class AST_Exception;
class AST_Expression;
class AST_Enum;
class AST_Operation;
class AST_Field;
class AST_Argument;
class AST_Attribute;
class AST_Union;
class AST_UnionFwd;
class AST_UnionBranch;
class AST_UnionLabel;
class AST_Constant;
class AST_EnumVal;
class AST_Array;
class AST_Sequence;
class AST_String;
class AST_Typedef;
class AST_Root;
class AST_Native;
class TAO_IDL_FE_Export ast_visitor
{
//
// = TITLE
// ast_visitor.
//
// = DESCRIPTION
// To implement BE processing we use the "Visitor Pattern", this
// is the abstract "Visitor". This class is the abstract base class
// for visitors that traverse the AST_<node> classes. Other abstract
// classes for C++ code generation, Java code generation, or IfR
// administration, for example, can be derived from this class and
// be the root of their own subtree of specialized visitor classes.
//
public:
ast_visitor (void);
// Constructor.
virtual ~ast_visitor (void);
// Destructor.
virtual int visit_decl (AST_Decl *d) = 0;
// Visit a decl node.
virtual int visit_scope (UTL_Scope *node) = 0;
// Visit the scope
virtual int visit_type (AST_Type *node) = 0;
// Visit the type.
virtual int visit_predefined_type (AST_PredefinedType *node) = 0;
// Visit the predefined type.
virtual int visit_module (AST_Module *node) = 0;
// Visit module.
virtual int visit_interface (AST_Interface *node) = 0;
// Visit interface.
virtual int visit_interface_fwd (AST_InterfaceFwd *node) = 0;
// Visit interface_fwd
virtual int visit_valuetype (AST_ValueType *node) = 0;
// Visit valuetype.
virtual int visit_valuetype_fwd (AST_ValueTypeFwd *node) = 0;
// Visit valuetype_fwd
virtual int visit_component (AST_Component *node) = 0;
// Visit component.
virtual int visit_home (AST_Home *node) = 0;
// Visit home.
virtual int visit_component_fwd (AST_ComponentFwd *node) = 0;
// Visit component_fwd
virtual int visit_eventtype (AST_EventType *node) = 0;
// Visit eventtype.
virtual int visit_eventtype_fwd (AST_EventTypeFwd *node) = 0;
// Visit eventtype_fwd
virtual int visit_factory (AST_Factory *node) = 0;
// Visit a OBV factory construct.
virtual int visit_structure (AST_Structure *node) = 0;
// Visit a structure.
virtual int visit_structure_fwd (AST_StructureFwd *node) = 0;
// Visit a structure.
virtual int visit_exception (AST_Exception *node) = 0;
// Visit exception
virtual int visit_expression (AST_Expression *node) = 0;
// Visit expression.
virtual int visit_enum (AST_Enum *node) = 0;
// Visit an enum.
virtual int visit_operation (AST_Operation *node) = 0;
// Visit an operation.
virtual int visit_field (AST_Field *node) = 0;
// Visit a field.
virtual int visit_argument (AST_Argument *node) = 0;
// Visit argument.
virtual int visit_attribute (AST_Attribute *node) = 0;
// Visit an attribute.
virtual int visit_union (AST_Union *node) = 0;
// Visit union.
virtual int visit_union_fwd (AST_UnionFwd *node) = 0;
// Visit union.
virtual int visit_union_branch (AST_UnionBranch *node) = 0;
// Visit union branch.
virtual int visit_union_label (AST_UnionLabel *node) = 0;
// Visit union label.
virtual int visit_constant (AST_Constant *node) = 0;
// Visit a constant.
virtual int visit_enum_val (AST_EnumVal *node) = 0;
// Visit enum val.
virtual int visit_array (AST_Array *node) = 0;
// Visit an array.
virtual int visit_sequence (AST_Sequence *node) = 0;
// Visit a sequence.
virtual int visit_string (AST_String *node) = 0;
// Visit a string.
virtual int visit_typedef (AST_Typedef *node) = 0;
// Visit a typedef.
virtual int visit_root (AST_Root *node) = 0;
// Visit a root.
virtual int visit_native (AST_Native *node) = 0;
// Visit a native.
virtual int visit_valuebox (AST_ValueBox *node) = 0;
// Visit a valuebox.
};
#endif /* TAO_IDL_FE_DLL_AST_VISITOR_H */
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