// ast_exception.cpp,v 1.20 2002/07/01 13:49:17 parsons Exp

/*

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*/

// AST_Exceptions denote IDL exception declarations
// AST_Exceptions are a subclass of AST_Decl (they are not types!)
// and of UTL_Scope.

#include "ast_exception.h"
#include "ast_field.h"
#include "ast_union.h"
#include "ast_enum.h"
#include "ast_enum_val.h"
#include "ast_visitor.h"
#include "utl_err.h"
#include "utl_identifier.h"
#include "utl_indenter.h"

ACE_RCSID (ast, 
           ast_exception, 
           "ast_exception.cpp,v 1.20 2002/07/01 13:49:17 parsons Exp")

AST_Exception::AST_Exception (void)
{
}

AST_Exception::AST_Exception (UTL_ScopedName *n,
                              idl_bool local,
                              idl_bool abstract)
  : AST_Structure (AST_Decl::NT_except,
                   n,
                   local,
                   abstract),
    UTL_Scope (AST_Decl::NT_except),
    AST_Decl (AST_Decl::NT_except,
              n),
    COMMON_Base (local,
                 abstract)
{
}

AST_Exception::~AST_Exception (void)
{
}

// Public operations.

// Are we or the parameter node involved in any recursion?
idl_bool
AST_Exception::in_recursion (AST_Type *node)
{
  if (node == 0)
    {
      // We are determining the recursive status for ourselves.
      node = this;
    }

  // Proceed if the number of members in our scope is greater than 0.
  if (this->nmembers () > 0)
    {
      // Continue until each element is visited.
      for (UTL_ScopeActiveIterator i (this, IK_decls);!i.is_done ();i.next ())
        {
          AST_Field *field = AST_Field::narrow_from_decl (i.item ());

          if (field == 0)
            // This will be an enum value or other legitimate non-field
            // member - in any case, no recursion.
            {
              continue;
            }

          AST_Type *type = field->field_type ();

          if (type == 0)
            {
              ACE_ERROR_RETURN ((LM_ERROR,
                                 ACE_TEXT ("(%N:%l) AST_Exception::")
                                 ACE_TEXT ("in_recursion - ")
                                 ACE_TEXT ("bad field type\n")),
                                0);
            }

          if (type->in_recursion (node))
            {
              return 1;
            }
        }
    }

  // Not in recursion.
  return 0;
}

// Private operations.

// Add this AST_Field node to the current scope.
AST_Field *
AST_Exception::fe_add_field (AST_Field *t)
{
  AST_Decl *d = 0;

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

      if (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,
                           I_FALSE,
                           t->local_name ());

  AST_Type *ft = t->field_type ();
  UTL_ScopedName *mru = ft->last_referenced_as ();

  if (mru != 0)
    {
      this->add_to_referenced (ft,
                               I_FALSE,
                               mru->first_component ());
    }

  this->fields_.enqueue_tail (t);

  return t;
}

// Add this AST_Union (manifest type declaration) to the current scope.
AST_Union *
AST_Exception::fe_add_union (AST_Union *t)
{
  AST_Decl *d = 0;

  // Already defined and cannot be redefined? Or already used?
  if ((d = this->lookup_for_add (t, I_FALSE)) != 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 local types.
  this->add_to_local_types (t);

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

  return t;
}

// Add this AST_Structure (manifest type declaration) to the current
// scope.
AST_Structure *
AST_Exception::fe_add_structure (AST_Structure *t)
{
  AST_Decl *d = 0;

  // Already defined and cannot be redefined? Or already used?
  if ((d = this->lookup_for_add (t, I_FALSE)) != 0)
    {
      if (!can_be_redefined (d))
        {
          idl_global->err ()->error2  (UTL_Error::EIDL_REDEF,
                                       t,
                                       this);
          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 local types.
  this->add_to_local_types (t);

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

  return t;
}

// Add this AST_Enum (manifest type declaration) to the current scope.
AST_Enum *
AST_Exception::fe_add_enum (AST_Enum *t)
{
  AST_Decl *d = 0;

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

      if (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 local types.
  this->add_to_local_types (t);

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

  return t;
}

// Add this AST_EnumVal (enumerator declaration) to the current scope.
// This is done to conform to the C++ scoping rules which declare
// enumerators in the enclosing scope (in addition to declaring them
// in the enum itself).
AST_EnumVal *
AST_Exception::fe_add_enum_val (AST_EnumVal *t)
{
  AST_Decl *d = 0;

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

      if (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,
                           I_FALSE,
                           t->local_name ());

  return t;
}

// Dump this AST_Exception node to the ostream o.
void
AST_Exception::dump (ACE_OSTREAM_TYPE &o)
{
  o << "exception ";
  this->local_name ()->dump (o);
  o << " {\n";
  UTL_Scope::dump (o);
  idl_global->indent ()->skip_to (o);
  o << "}";
}

int
AST_Exception::ast_accept (ast_visitor *visitor)
{
  return visitor->visit_exception (this);
}

// Narrowing methods.
IMPL_NARROW_METHODS1(AST_Exception, AST_Structure)
IMPL_NARROW_FROM_DECL(AST_Exception)
IMPL_NARROW_FROM_SCOPE(AST_Exception)
