// ast_factory.cpp,v 1.11 2006/06/15 18:56:09 parsons Exp

/*

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*/

// AST_Factory nodes denote OBV factory construct declarations
// AST_Factory is a subclass of AST_Decl (it is not a type!)
// and of UTL_Scope (the arguments are managed in a scope).

#include "ast_factory.h"
#include "ast_argument.h"
#include "ast_exception.h"
#include "ast_visitor.h"
#include "global_extern.h"
#include "utl_err.h"
#include "utl_identifier.h"
#include "utl_exceptlist.h"
#include "utl_namelist.h"

ACE_RCSID (ast,
           ast_factory,
           "ast_factory.cpp,v 1.11 2006/06/15 18:56:09 parsons Exp")

AST_Factory::AST_Factory (void)
  : COMMON_Base (),
    AST_Decl (),
    UTL_Scope (),
    pd_exceptions (0),
    pd_n_exceptions (0),
    argument_count_ (-1),
    has_native_ (0)
{
}

AST_Factory::AST_Factory (UTL_ScopedName *n)
  : COMMON_Base (1,
                 0), //@@ Always local, never abstract
    AST_Decl (AST_Decl::NT_factory,
              n),
    UTL_Scope (AST_Decl::NT_factory),
    pd_exceptions (0),
    pd_n_exceptions (0),
    argument_count_ (-1),
    has_native_ (0)
{
}

AST_Factory::~AST_Factory (void)
{
}

// Public operations.

UTL_ExceptList *
AST_Factory::exceptions (void)
{
  return this->pd_exceptions;
}

int
AST_Factory::n_exceptions (void)
{
  return this->pd_n_exceptions;
}

// Return the member count.
int
AST_Factory::argument_count (void)
{
  this->compute_argument_attr ();

  return this->argument_count_;
}

// Return if any argument or the return type is a <native> type.
int
AST_Factory::has_native (void)
{
  this->compute_argument_attr ();

  return this->has_native_;
}

void
AST_Factory::destroy (void)
{
  if (0 != this->pd_exceptions)
    {
      this->pd_exceptions->destroy ();
      this->pd_exceptions = 0;
    }

  this->AST_Decl::destroy ();
  this->UTL_Scope::destroy ();
}

// Private operations.

// Compute total number of members.
int
AST_Factory::compute_argument_attr (void)
{
  if (this->argument_count_ != -1)
    {
      return 0;
    }

  AST_Decl *d = 0;
  AST_Type *type = 0;
  AST_Argument *arg = 0;

  this->argument_count_ = 0;

  // If there are elements in this scope.
  if (this->nmembers () > 0)
    {
      for (UTL_ScopeActiveIterator i (this, IK_decls);
           !i.is_done ();
           i.next ())
        {
          // Get the next AST decl node.
          d = i.item ();

          if (d->node_type () == AST_Decl::NT_argument)
            {
              this->argument_count_++;

              arg = AST_Argument::narrow_from_decl (d);

              type = AST_Type::narrow_from_decl (arg->field_type ());

              if (type->node_type () == AST_Decl::NT_native)
                {
                  this->has_native_ = 1;
                }
            }
        }
    }

  return 0;
}

// Add this AST_Argument node (an factory argument declaration)
// to this scope.
AST_Argument *
AST_Factory::fe_add_argument (AST_Argument *t)
{
  AST_Decl *d = 0;

  // Already defined and cannot be redefined? Or already used?
  if ((d = lookup_by_name_local (t->local_name(), 0)) != 0)
    {
      if (!can_be_redefined (d))
        {
          idl_global->err ()->error3 (UTL_Error::EIDL_REDEF,
                                      t,
                                      this,
                                      d);
          return 0;
        }

      if (this->referenced (d, t->local_name ()))
        {
          idl_global->err ()->error3 (UTL_Error::EIDL_DEF_USE,
                                      t,
                                      this,
                                      d);
          return 0;
        }

      if (t->has_ancestor (d))
        {
          idl_global->err ()->redefinition_in_scope (t,
                                                     d);
          return 0;
        }
    }

  // Add it to scope.
  this->add_to_scope (t);

  // Add it to set of locally referenced symbols.
  this->add_to_referenced (t,
                           false,
                           t->local_name ());

  return t;
}

UTL_NameList *
AST_Factory::fe_add_exceptions (UTL_NameList *t)
{
  UTL_ScopedName *nl_n = 0;
  AST_Exception *fe = 0;
  AST_Decl *d = 0;

  this->pd_exceptions = 0;

  for (UTL_NamelistActiveIterator nl_i (t); !nl_i.is_done (); nl_i.next ())
    {
      nl_n = nl_i.item ();

      d = this->lookup_by_name (nl_n,
                                true);

      if (d == 0 || d->node_type() != AST_Decl::NT_except)
        {
          idl_global->err ()->lookup_error (nl_n);
          return 0;
        }

      fe = AST_Exception::narrow_from_decl (d);

      if (fe == 0)
        {
          idl_global->err ()->error1 (UTL_Error::EIDL_ILLEGAL_RAISES,
                                      this);
          return 0;
        }

      if (this->pd_exceptions == 0)
        {
          ACE_NEW_RETURN (this->pd_exceptions,
                          UTL_ExceptList (fe,
                                          0),
                          0);
        }
      else
        {
          UTL_ExceptList *el = 0;
          ACE_NEW_RETURN (el,
                          UTL_ExceptList (fe,
                                          0),
                          0);

          this->pd_exceptions->nconc (el);
        }

      this->pd_n_exceptions++;
    }

  // This return value is never used, it's easier to
  // destroy it here and return 0 than to destroy it
  // each place it is passed in.
  t->destroy ();
  delete t;
  t = 0;
  return t;
}

// Dump this AST_Factory node (an OBV factory construct) to the ostream o.
void
AST_Factory::dump (ACE_OSTREAM_TYPE &o)
{
  AST_Decl *d = 0;

  this->dump_i (o, "factory ");
  this->local_name ()->dump (o);
  this->dump_i (o, "(");

  // Iterator must be explicitly advanced inside the loop.
  for (UTL_ScopeActiveIterator i (this, IK_decls);
       !i.is_done();)
    {
      d = i.item ();
      d->dump (o);
      i.next ();

      if (!i.is_done())
        {
          this->dump_i (o, ", ");
        }
    }

  this->dump_i (o, ")");

}

int
AST_Factory::ast_accept (ast_visitor *visitor)
{
  return visitor->visit_factory (this);
}

// Data accessors

// Narrowing.
IMPL_NARROW_METHODS2(AST_Factory, AST_Decl, UTL_Scope)
IMPL_NARROW_FROM_DECL(AST_Factory)
IMPL_NARROW_FROM_SCOPE(AST_Factory)
