// fe_declarator.cpp,v 1.17 2006/06/15 18:56:10 parsons Exp

/*

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*/

#include "fe_declarator.h"
#include "ast_array.h"
#include "ast_type.h"
#include "utl_err.h"
#include "global_extern.h"
#include "nr_extern.h"
#include "ace/config-all.h"

ACE_RCSID (fe,
           fe_declarator,
           "fe_declarator.cpp,v 1.17 2006/06/15 18:56:10 parsons Exp")

FE_Declarator::FE_Declarator (UTL_ScopedName *n,
                              DeclaratorType dt,
			                        AST_Decl *cp)
 : pd_complex_part (cp),
	 pd_decl_type (dt)
{
  this->pd_name = n;
}

// Compose the type of the complex declarator (if any) with the base
// type supplied in ct.
AST_Type *
FE_Declarator::compose (AST_Decl *d)
{
  AST_Decl::NodeType nt = d->node_type ();

  if (nt == AST_Decl::NT_struct_fwd || nt == AST_Decl::NT_union_fwd)
    {
      if (! AST_Type::narrow_from_decl (d)->is_defined ())
        {
          idl_global->err ()->error1 (UTL_Error::EIDL_ILLEGAL_ADD,
                                      d);

          return 0;
        }
    }

  AST_Array	*arr = 0;
  AST_Type *ct = 0;

  ct = AST_Type::narrow_from_decl (d);

  if (ct == 0)
    {
      idl_global->err ()->not_a_type (d);
      return 0;
    }

  // All uses of forward declared types must
  // not have a different prefix from the place of declaration.
  if (!ct->is_defined ())
    {
      char *current_prefix = 0;
      idl_global->pragma_prefixes ().top (current_prefix);

      const char *original_prefix = d->prefix ();
      AST_Decl *scope = d;

      // Maybe the prefix hasn't been applied yet.
      while (ACE_OS::strcmp (original_prefix, "") == 0)
        {
          scope = ScopeAsDecl (scope->defined_in ());

          // Are we at global scope.8
          if (scope == 0)
            {
              break;
            }

          original_prefix = scope->prefix ();
        }

      // Skip if the pointers are the same.
      if (d->prefix () != original_prefix)
        {
          d->prefix (const_cast<char *> (original_prefix));
        }

      if (current_prefix != 0
          && ACE_OS::strcmp (current_prefix, d->prefix ()) != 0)
        {
          idl_global->err ()->error1 (UTL_Error::EIDL_PREFIX_CONFLICT,
                                      d);

          return 0;
        }
    }

  if (this->pd_decl_type == FD_simple || this->pd_complex_part == 0)
    {
      return ct;
    }

  if (this->pd_complex_part->node_type () == AST_Decl::NT_array)
    {
      arr = AST_Array::narrow_from_decl (this->pd_complex_part);
      
      // The base type of an array isn't set until after the array
      // has been created, so the check below gets done at this point.
      arr->set_base_type (ct);      
      AST_Decl::NodeType nt = ct->unaliased_type ()->node_type ();
      
      if (nt == AST_Decl::NT_string || nt == AST_Decl::NT_wstring)
        {
          idl_global->string_member_seen_ = true;
        }
        
      return arr;
    }

  // We shouldn't get here.
  return 0;
}

void
FE_Declarator::destroy (void)
{
  this->pd_name->destroy ();
  delete this->pd_name;
  this->pd_name = 0;
}

// Data accessors.

AST_Decl *
FE_Declarator::complex_part (void)
{
  return this->pd_complex_part;
}

UTL_ScopedName *
FE_Declarator::name (void)
{
  return this->pd_name;
}

FE_Declarator::DeclaratorType
FE_Declarator::decl_type (void)
{
  return this->pd_decl_type;
}
