ast_type.cpp

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// ast_type.cpp,v 1.19 2003/11/04 05:21:28 dhinton Exp

/*

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*/

// AST_Type is the base class for all AST classes which represent
// IDL type constructs.

#include "ast_type.h"
#include "ast_visitor.h"
#include "utl_identifier.h"
#include "idl_defines.h"
#include "nr_extern.h"
#include "ace/Log_Msg.h"
#include "ace/OS_NS_string.h"
#include "ace/OS_NS_stdio.h"
#include "ace/OS_Memory.h"

ACE_RCSID (ast, 
           ast_type, 
           "ast_type.cpp,v 1.19 2003/11/04 05:21:28 dhinton Exp")

AST_Type::AST_Type (void)
  : COMMON_Base (),
    AST_Decl (),
    ifr_added_ (0),
    ifr_fwd_added_ (0),
    size_type_ (AST_Type::SIZE_UNKNOWN),
    has_constructor_ (0),
    nested_type_name_ (0)
{
}

AST_Type::AST_Type (AST_Decl::NodeType nt,
                    UTL_ScopedName *n)
  : COMMON_Base (),
    AST_Decl (nt,
              n),
    ifr_added_ (0),
    ifr_fwd_added_ (0),
    size_type_ (AST_Type::SIZE_UNKNOWN),
    has_constructor_ (0),
    nested_type_name_ (0)
{
}

AST_Type::~AST_Type (void)
{
}

// Public operations.

// Return our size type.
AST_Type::SIZE_TYPE
AST_Type::size_type (void)
{
  if (this->size_type_ == AST_Type::SIZE_UNKNOWN)
    {
      (void) this->compute_size_type ();
    }

  return this->size_type_;
}

// Set our size type and that of all our ancestors.
void
AST_Type::size_type (AST_Type::SIZE_TYPE st)
{
  // Precondition - you cannot set somebody's sizetype to unknown.
  ACE_ASSERT (st != AST_Type::SIZE_UNKNOWN);

  // Size type can be VARIABLE or FIXED.
  if (this->size_type_ == AST_Type::SIZE_UNKNOWN) // not set yet
    {
      this->size_type_ = st; // set it
    }
  else if ((this->size_type_ == AST_Type::FIXED)
           && (st == AST_Type::VARIABLE))
    {
      // Once we are VARIABLE, we cannot be FIXED. But if we were FIXED and then
      // get overwritten to VARIABLE, it is fine. Such a situation occurs only
      // when setting the sizes of structures and unions.
      this->size_type_ = st;
    }
}

// Compute the size type of the node in question
int
AST_Type::compute_size_type (void)
{
  return 0;
}

idl_bool
AST_Type::in_recursion (AST_Type *)
{
  // By default we are not involved in recursion.
  return 0;
}

idl_bool
AST_Type::is_defined (void)
{
  // AST_Interface, AST_Structure, and AST_Union will
  // override this, as will AST_InterfaceFwd, etc.
  return 1;
}

idl_bool
AST_Type::ifr_added (void)
{
  return this->ifr_added_;
}

void
AST_Type::ifr_added (idl_bool val)
{
  this->ifr_added_ = val;
}

idl_bool
AST_Type::ifr_fwd_added (void)
{
  return this->ifr_fwd_added_;
}

void
AST_Type::ifr_fwd_added (idl_bool val)
{
  this->ifr_fwd_added_ = val;
}

idl_bool
AST_Type::has_constructor (void)
{
  return this->has_constructor_;
}

void
AST_Type::has_constructor (idl_bool value)
{
  // Similarly to be_decl::size_type_, once this
  // gets set to I_TRUE, we don't want it to
  // change back.
  if (this->has_constructor_ == 0)
    {
      this->has_constructor_ = value;
    }
}

// This code works. However, whether we should generate the
// ACE_NESTED_CLASS macro or not should be based on an option to the
// compiler. The previous version generated a relative path.
// This version always generates ACE_NESTED_CLASS, (leave ace/ACE.h and friends
// do the porting)
//
// Caution: returns the same buffer pointer even if the contents may change
// in the next call.  (return std::string anyone?)
//
// Return the type name using the ACE_NESTED_CLASS macro

const char *
AST_Type::nested_type_name (AST_Decl *use_scope,
                            const char *suffix,
                            const char *prefix)
{
  return this->nested_name (this->local_name ()->get_string (),
                            this->full_name (),
                            use_scope,
                            suffix,
                            prefix);
}

// This is the real thing used by the method above.
const char *
AST_Type::nested_name (const char* local_name,
                       const char* full_name,
                       AST_Decl *use_scope,
                       const char *suffix,
                       const char *prefix)
{
  // Some compilers do not like generating a fully scoped name for a type that
  // was defined in the same enclosing scope in which it was defined. For such,
  // we emit a macro defined in the ACE library.
  //

  // The tricky part here is that it is not enough to check if the
  // typename we are using was defined in the current scope. But we
  // need to ensure that it was not defined in any of our ancestor
  // scopes as well. If that is the case, then we can generate a fully
  // scoped name for that type, else we use the ACE_NESTED_CLASS macro.

  // Thus we need some sort of relative name to be generated.

  if (this->nested_type_name_ == 0)
    {
      ACE_NEW_RETURN (this->nested_type_name_,
                      char[NAMEBUFSIZE],
                      0);
    }