ast_structure.cpp

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// ast_structure.cpp,v 1.32 2003/11/10 20:29:25 dhinton Exp

/*

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*/

// AST_Structure nodes denote IDL struct declarations.
// AST_Structure is a subclass of AST_ConcreteType and of UTL_Scope (the
// structure's fields are managed in a scope).

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

ACE_RCSID (ast, 
           ast_structure, 
           "ast_structure.cpp,v 1.32 2003/11/10 20:29:25 dhinton Exp")

AST_Structure::AST_Structure (void)
  : COMMON_Base (),
    AST_Decl (),
    AST_Type (),
    AST_ConcreteType (),
    UTL_Scope (),
    member_count_ (-1),
    local_struct_ (-1)
{
}

AST_Structure::AST_Structure (UTL_ScopedName *n,
                              idl_bool local,
                              idl_bool abstract)
  : COMMON_Base (local,
                 abstract),
    AST_Decl (AST_Decl::NT_struct,
              n),
    AST_Type (AST_Decl::NT_struct,
              n),
    AST_ConcreteType (AST_Decl::NT_struct,
                      n),
    UTL_Scope (AST_Decl::NT_struct),
    member_count_ (-1),
    local_struct_ (-1)
{
}

AST_Structure::AST_Structure (AST_Decl::NodeType nt,
                              UTL_ScopedName *n,
                              idl_bool local,
                              idl_bool abstract)
  : COMMON_Base (local,
                 abstract),
    AST_Decl (nt,
              n),
    AST_Type (nt,
              n),
    AST_ConcreteType (nt,
                      n),
    UTL_Scope (nt),
    member_count_ (-1),
    local_struct_ (-1)
{
}

AST_Structure::~AST_Structure (void)
{
}

// Are we or the parameter node involved in any recursion?
idl_bool
AST_Structure::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)
    {
      // Initialize an iterator to iterate over our scope.
      // Continue until each element is visited.
      for (UTL_ScopeActiveIterator si (this, UTL_Scope::IK_decls); 
           !si.is_done (); 
           si.next ())
        {
          AST_Field *field = AST_Field::narrow_from_decl (si.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->node_type () == AST_Decl::NT_typedef)
            {
              AST_Typedef *td = AST_Typedef::narrow_from_decl (type);
              type = td->primitive_base_type ();
            }

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

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

  // Not in recursion.
  return 0;
}

// Return the member count.
int
AST_Structure::member_count (void)
{
  if (this->member_count_ == -1)
    {
      this->compute_member_count ();
    }

  return this->member_count_;
}

size_t
AST_Structure::nfields (void) const
{
  return this->fields_.size ();
}

int
AST_Structure::field (AST_Field **&result,
                      size_t slot) const
{
  return this->fields_.get (result,
                            slot);
}

idl_bool
AST_Structure::is_local (void)
{
  if (this->local_struct_ == -1)
    {
      if (this->is_local_)
        {
          this->local_struct_ = this->is_local_;
        }
      else
        {
          this->local_struct_ = 0;

          if (this->nmembers () > 0)
            {
              // Instantiate a scope iterator.
              for (UTL_ScopeActiveIterator si (this, UTL_Scope::IK_decls);
                   !si.is_done ();
                   si.next ())
                {
                  if (si.item ()->is_local ())
                    {
                      this->local_struct_ = I_TRUE;
                      break;
                    }
                }
            }
        }
    }

  return this->local_struct_;
}

int
AST_Structure::contains_wstring (void)
{
  if (this->contains_wstring_ == -1)
    {
      for (UTL_ScopeActiveIterator si (this, UTL_Scope::IK_decls);
           !si.is_done ();
           si.next ())
        {
          if (si.item ()->contains_wstring () == 1)
            {
              this->contains_wstring_ = 1;
              return this->contains_wstring_;
            }
        }

      this->contains_wstring_ = 0;
    }

  return this->contains_wstring_;
}

// Private operations.

// Add this AST_Field node (a field declaration) to this scope.
AST_Field *
AST_Structure::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 (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,
                           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 an AST_Structure node (a manifest struct type) to this scope.
AST_Structure *
AST_Structure::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 ()->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,