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// $Id$
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// be_union.h
//
// = DESCRIPTION
// Extension of class AST_Union that provides additional means for C++
// mapping.
//
// = AUTHOR
// Copyright 1994-1995 by Sun Microsystems, Inc.
// and
// Aniruddha Gokhale
//
// ============================================================================
#ifndef BE_UNION_H
#define BE_UNION_H
#include "be_type.h"
#include "be_scope.h"
#include "ast_union.h"
class AST_ConcreteType;
class UTL_StrList;
class be_visitor;
class be_union : public virtual AST_Union,
public virtual be_scope,
public virtual be_type
{
public:
be_union (void);
// Default constructor.
be_union(AST_ConcreteType *dt,
UTL_ScopedName *n,
UTL_StrList *p,
idl_bool local,
idl_bool abstract);
// Constructor.
virtual int gen_var_defn (char *local_name = 0);
// Generate the _var class definition.
virtual int gen_var_impl (char *local_name = 0,
char *full_name = 0);
// Generate the implementation for the _var class.
virtual int gen_out_defn (char *local_name = 0);
// Generate the _out class definition.
virtual int gen_out_impl (char *local_name = 0,
char *full_name = 0);
// Generate the _out implementation.
virtual int default_index (void);
// Return the default index used.
virtual idl_bool has_duplicate_case_labels (void);
// Do we have at least one member with multiple case labels?
virtual void destroy (void);
// Cleanup function.
// Visiting.
virtual int accept (be_visitor *visitor);
// Narrowing.
DEF_NARROW_METHODS3 (be_union, AST_Union, be_scope, be_type);
DEF_NARROW_FROM_DECL(be_union);
DEF_NARROW_FROM_SCOPE(be_union);
struct DefaultValue
{
union PermittedTypes
{
char char_val;
ACE_CDR::WChar wchar_val;
unsigned long bool_val;
ACE_INT16 short_val;
ACE_UINT16 ushort_val;
ACE_INT32 long_val;
ACE_UINT32 ulong_val;
ACE_UINT32 enum_val;
// TO-DO - handle (u)longlong types.
} u;
long computed_;
// computed == -1 => error condition
// == 0 => does not exist because all cases have been covered
// == 1 => already computed
// == -2 => initial value
};
int default_value (DefaultValue &);
// Get the default value.
protected:
virtual int compute_size_type (void);
// Compute the size type if it is unknown.
private:
int compute_default_index (void);
// Count the default index.
virtual int compute_default_value (void);
// Compute the implicit default value (if any).
int default_index_;
// Default label index (zero based indexing).
DefaultValue default_value_;
// Implicit default value (if any).
};
#endif
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