path: root/TAO/TAO_IDL/be/be_visitor_valuetype/arglist.cpp

//
// $Id$
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    arglist.cpp
//
// = DESCRIPTION
//    Visitor generating the parameter list of operations
//    in the Valuetype class.
//
// = AUTHOR
//    Torsten Kuepper  <kuepper2@lfa.uni-wuppertal.de>
//    based on code from Aniruddha Gokhale
//
// ============================================================================

ACE_RCSID (be_visitor_valuetype, 
           arglist, 
           "$Id$")

// ************************************************************
//   Operation visitor to generate the argument list.
//   We have separated code generation for this from the 4 main
//   visitors to avoid code duplication and tight coupling.
// ************************************************************

be_visitor_obv_operation_arglist::be_visitor_obv_operation_arglist (
    be_visitor_context *ctx
  )
  : be_visitor_scope (ctx)
{
}

be_visitor_obv_operation_arglist::~be_visitor_obv_operation_arglist (void)
{
}

int
be_visitor_obv_operation_arglist::visit_operation (be_operation *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  *os << " (" << be_idt << be_idt_nl;

  // All we do is hand over code generation to our scope.
  if (this->visit_scope (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_obv_operation_arglist::"
                         "visit_operation - "
                         "codegen for scope failed\n"),
                        -1);
    }

  // Generate the ACE_ENV_ARG_DECL parameter for the alternative mapping.
  if (!be_global->exception_support ())
    {
      // Use ACE_ENV_SINGLE_ARG_DECL or ACE_ENV_ARG_DECL depending on
      // whether the operation node has parameters.
      const char *env_decl = (node->argument_count () > 0 
                                ? " ACE_ENV_ARG_DECL" 
                                : "ACE_ENV_SINGLE_ARG_DECL");

      switch (this->ctx_->state ())
        {
        case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_CH:
        case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_OBV_CH:
        case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IMPL_CH:
          // Last argument - is always ACE_ENV_ARG_DECL.
          *os << env_decl << "_WITH_DEFAULTS" << be_uidt_nl;
          break;
        case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IMPL_CS:
          // Last argument - is always ACE_ENV_ARG_DECL.
          *os << env_decl << be_uidt_nl;
          break;
        default:
          *os << env_decl << be_uidt_nl;
          break;
        }
    }
  else
    {
      *os << be_uidt_nl;
    }

  *os << ")";

  be_visitor_context ctx = *this->ctx_;
  be_visitor_operation operation_visitor (&ctx);

  if (operation_visitor.gen_throw_spec (node) == -1)
    {
      return -1;
    }

  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_CH:
      // Each method is pure virtual in the Valuetype class.
      *os << " = 0;" << be_nl;
      break;
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IH:
      break;
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IS:
      break;
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IMPL_CH:
      *os << ";" << be_nl;
      break;
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IMPL_CS:
    default:
       *os << be_nl;
    }

  return 0;
}

int
be_visitor_obv_operation_arglist::visit_argument (be_argument *node)
{
  be_visitor_context ctx (*this->ctx_);

  // First grab the interface definition inside which this operation is
  // defined. We need this since argument types may very well be declared
  // inside the scope of the interface node. In such cases, we would like to
  // generate the appropriate relative scoped names.
  be_operation *op = this->ctx_->be_scope_as_operation ();

  if (!op)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad operation\n"),
                        -1);
    }

  // We need the interface node in which this operation was defined. However,
  // if this operation node was an attribute node in disguise, we get this
  // information from the context.
  // %! use AST_Interface
  be_valuetype *intf = this->ctx_->attribute ()
    ? be_valuetype::narrow_from_scope (this->ctx_->attribute ()->defined_in ())
    : be_valuetype::narrow_from_scope (op->defined_in ());

  if (!intf)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad interface\n"),
                        -1);
    }

  ctx.scope (intf);
  ctx.node (node); // save the argument node

  // Retrieve the type.
  be_type *bt = be_type::narrow_from_decl (node->field_type ());

  if (!bt)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_args_arglist::"
                         "visit_argument - "
                         "Bad argument type\n"),
                        -1);
    }

  int status = 0;

  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_CH:
      {
        ctx.state (TAO_CodeGen::TAO_ARGUMENT_ARGLIST_CH);
        be_visitor_args_arglist visitor (&ctx);
        status = bt->accept (&visitor);
        break;
      }
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_OTHERS:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_SH:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IH:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IS:
      {
        ctx.state (TAO_CodeGen::TAO_ARGUMENT_ARGLIST_OTHERS);
        be_visitor_args_arglist visitor (&ctx);
        status = bt->accept (&visitor);
        break;
      }
    default:
      {
        ACE_ERROR_RETURN ((LM_ERROR,
                           "(%N:%l) be_visitor_arglist::"
                           "visit_argument - "
                           "Bad context\n"),
                          -1);
      }
    }

  if (status == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "codegen for argument failed\n"),
                        -1);
    }

  return 0;
}

int
be_visitor_obv_operation_arglist::post_process (be_decl *bd)
// derived from be_visitor_operation_argument::post_process (be_decl *bd)
{
  TAO_OutStream *os = this->ctx_->stream ();

  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_CH:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_OTHERS:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_SH:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IH:
    case TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_IS:
      if (!this->last_node (bd))
        {
          *os << ", ";
        }
      else
        {
          *os << "";
        }
 
      break;
    default:
      break;
    }

  return 0;
}