// ast_typedef.cpp,v 1.15 2002/01/08 21:05:04 parsons Exp

/*

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*/

// AST_Typedef nodes represent an IDL typedef statement.
// AST_Typedef is a subclass of AST_Decl (it is not a type,
// but instead is a type renaming).
// AST_Typedef nodes have a base type (a subclass of AST_Type)
// and a name (an UTL_ScopedName).

#include "idl.h"
#include "idl_extern.h"

ACE_RCSID(ast, ast_typedef, "ast_typedef.cpp,v 1.15 2002/01/08 21:05:04 parsons Exp")

// Constructor(s) and destructor.
AST_Typedef::AST_Typedef (void)
 : pd_base_type (0)
{
}

AST_Typedef::AST_Typedef (AST_Type *bt,
                          UTL_ScopedName *n,
                          idl_bool local,
                          idl_bool abstract)
 : AST_Type (AST_Decl::NT_typedef,
             n),
   AST_Decl (AST_Decl::NT_typedef,
             n),
   COMMON_Base (bt->is_local () || local,
                abstract),
   pd_base_type (bt)
{
}

AST_Typedef::~AST_Typedef (void)
{
}

// Given a typedef node, traverse the chain of base types until they are no
// more typedefs, and return that most primitive base type.
AST_Type *
AST_Typedef::primitive_base_type (void)
{
  AST_Type *d = this;
  AST_Typedef *temp = 0;

  while (d && d->node_type () == AST_Decl::NT_typedef)
    {
      temp = AST_Typedef::narrow_from_decl (d);
      d = AST_Type::narrow_from_decl (temp->base_type ());
    }

  return d;
}

// Redefinition of inherited virtual operations.

// Dump this AST_Typedef node to the ostream o.
void
AST_Typedef::dump (ACE_OSTREAM_TYPE&o)
{
  if (this->is_local ())
    {
      o << "(local) ";
    }
  else
    {
      o << "(abstract) ";
    }

  o << "typedef ";
  this->pd_base_type->dump (o);
  o << " ";
  this->local_name ()->dump (o);
}

int
AST_Typedef::ast_accept (ast_visitor *visitor)
{
  return visitor->visit_typedef (this);
}

// Data accessors.

AST_Type *
AST_Typedef::base_type (void)
{
  return this->pd_base_type;
}

// Narrowing.
IMPL_NARROW_METHODS1(AST_Typedef, AST_Type)
IMPL_NARROW_FROM_DECL(AST_Typedef)
