// ast_typedef.cpp,v 1.22 2006/06/15 18:56:09 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 "ast_typedef.h"
#include "ast_visitor.h"
#include "utl_identifier.h"

#include "ace/Log_Msg.h"

ACE_RCSID (ast,
           ast_typedef,
           "ast_typedef.cpp,v 1.22 2006/06/15 18:56:09 parsons Exp")

AST_Typedef::AST_Typedef (void)
  : COMMON_Base (),
    AST_Decl (),
    AST_Type (),
    pd_base_type (0),
    owns_base_type_ (false)
{
}

AST_Typedef::AST_Typedef (AST_Type *bt,
                          UTL_ScopedName *n,
                          bool local,
                          bool abstract)
  : COMMON_Base (bt->is_local () || local,
                 abstract),
    AST_Decl (AST_Decl::NT_typedef,
              n),
    AST_Type (AST_Decl::NT_typedef,
              n),
    pd_base_type (bt),
    owns_base_type_ (false)
{
  AST_Decl::NodeType nt = bt->node_type ();
  
  if (AST_Decl::NT_array == nt || AST_Decl::NT_sequence == nt)
    {
      this->owns_base_type_ = true;
    }
}

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) const
{
  AST_Type *d = const_cast<AST_Typedef *> (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.

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

bool
AST_Typedef::legal_for_primary_key (void) const
{
  return this->primitive_base_type ()->legal_for_primary_key ();
}

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

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

// Compute the size type of the node in question.
int
AST_Typedef::compute_size_type (void)
{
  AST_Type *type = this->base_type ();

  if (type == 0)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_typedef::compute_size_type - "
                         "bad base type\n"),
                        -1);
    }

  // Our size type is the same as our type.
  this->size_type (type->size_type ());

  // While we're here, take care of has_constructor.
  this->has_constructor (type->has_constructor ());

  return 0;
}

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

void
AST_Typedef::destroy (void)
{
  if (this->owns_base_type_)
    {
      this->pd_base_type->destroy ();
      delete this->pd_base_type;
      this->pd_base_type = 0;
    }

  this->AST_Type::destroy ();
}

// Data accessors.

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