//
// $Id$
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    discriminant_cs.cpp
//
// = DESCRIPTION
//    Visitor generating code for discriminant of the union
//
// = AUTHOR
//    Aniruddha Gokhale
//
// ============================================================================

#include	"idl.h"
#include	"idl_extern.h"
#include	"be.h"

#include "be_visitor_union.h"

ACE_RCSID(be_visitor_union, discriminant_cs, "$Id$")


// *************************************************************************
// be_visitor_discriminant_cs - visitor for discriminant in client stubs
// *************************************************************************

be_visitor_union_discriminant_cs::be_visitor_union_discriminant_cs
(be_visitor_context *ctx)
  : be_visitor_decl (ctx)
{
}

be_visitor_union_discriminant_cs::~be_visitor_union_discriminant_cs (void)
{
}

int
be_visitor_union_discriminant_cs::visit_enum (be_enum *node)
{
  be_union *bu =
    this->ctx_->be_node_as_union ();  // get the enclosing union backend
  be_type *bt;

  // check if we are visiting this node via a visit to a typedef node
  if (this->ctx_->alias ())
    bt = this->ctx_->alias ();
  else
    bt = node;

  if (bt->node_type () != AST_Decl::NT_typedef // not a typedef
      && bt->is_child (bu)) // bt is defined inside the union
    {
      // instantiate a visitor context with a copy of our context. This info
      // will be modified based on what type of node we are visiting
      be_visitor_context ctx (*this->ctx_);
      ctx.node (node); // set the node to be the node being visited. The scope
                       // is still the same

      // generate the typecode for the enum
      ctx.state (TAO_CodeGen::TAO_ENUM_CS);
      be_visitor *visitor = tao_cg->make_visitor (&ctx);
      if (!visitor)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_union_discriminant_cs::"
                             "visit_enum - "
                             "Bad visitor\n"
                             ), -1);
        }
      if (node->accept (visitor) == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_union_discriminant_cs::"
                             "visit_enum - "
                             "codegen failed\n"
                             ), -1);
        }
      delete visitor;
    }
  return 0;
}