// This may look like C, but it's really -*- C++ -*-
// ast_decl.h,v 1.41 2006/06/15 18:56:10 parsons Exp
/*

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 */

#ifndef _AST_DECL_AST_DECL_HH
#define _AST_DECL_AST_DECL_HH

// Rock bottom of AST class hierarchy
//
// This class is inherited by all classes which represent named entities
// in IDL. It implements the line and file recording mechanism and also
// records the type of the node. This may be useful for BEs to be able
// to distinguish the real type of a node given only a superclass.

#include "utl_scoped_name.h"
#include "idl_narrow.h"
#include "ace/os_include/sys/os_types.h"
#include "ace/SString.h"

// This is for AIX w/IBM C++
class Identifier;

class UTL_Scope;
class UTL_String;
class ast_visitor;

// This class is needed (only for g++) to get around a bug in g++ which
// causes virtual operations to not be looked up correctly if an operation
// is defined in more than one virtual public base class. This class makes
// the hierarchy rooted in a single class, thereby eliminating the situation
// that causes the bug to appear

class TAO_IDL_FE_Export COMMON_Base
{
public:

  COMMON_Base (bool local = false,
               bool abstract = false);

  virtual ~COMMON_Base (void) {}

  bool is_local (void) const;
  void is_local (bool val);
  
  bool is_abstract (void) const;
  void is_abstract (bool val);

  // A no-op, overridden in the child classes.
  virtual void destroy (void);

        // Narrowing.
  DEF_NARROW_METHODS0(COMMON_Base);

protected:
  bool is_local_;
  bool is_abstract_;
};

class TAO_IDL_FE_Export AST_Decl : public virtual COMMON_Base
{
public:
  // Enum defining the different kinds of AST nodes.
  enum NodeType {
        NT_module                   // Denotes a module
      , NT_root                     // Denotes the root of AST
      , NT_interface                // Denotes an interface
      , NT_interface_fwd            // Fwd declared interface
      , NT_valuetype                // Denotes a valuetype
      , NT_valuetype_fwd            // Fwd declared valuetype
      , NT_const                    // Denotes a constant
      , NT_except                   // Denotes an exception
      , NT_attr                     // Denotes an attribute
      , NT_op                       // Denotes an operation
      , NT_argument                 // Denotes an op. argument
      , NT_union                    // Denotes a union
      , NT_union_fwd                // Fwd declared union
      , NT_union_branch             // Denotes a union branch
      , NT_struct                   // Denotes a structure
      , NT_struct_fwd               // Fwd declared struct
      , NT_field                    // Denotes a field in structure
      , NT_enum                     // Denotes an enumeration
      , NT_enum_val                 // Denotes an enum. value
      , NT_string                   // Denotes an IDL string
      , NT_wstring                  // Denotes an IDL wstring
      , NT_array                    // Denotes an IDL array
      , NT_sequence                 // Denotes an IDL sequence
      , NT_typedef                  // Denotes a typedef
      , NT_pre_defined              // Denotes a predefined type
      , NT_native                   // Denotes a native type
                                    // dependent on the programming
                                    // language
      , NT_factory                  // Denotes a OBV factory construct
      , NT_component                // Denotes a CORBA component
      , NT_component_fwd            // Denotes a forward declared component
      , NT_home                     // Denotes a CORBA component home
      , NT_eventtype                // Denotes a CCM event source or sink
      , NT_eventtype_fwd            // Denotes a forward declared CCM event
      , NT_valuebox                 // Denotes an value box
  };

  // Operations.

  // Constructor(s).
  AST_Decl (void);

  AST_Decl (NodeType type,
            UTL_ScopedName *n,
            bool anonymous = false);

  virtual ~AST_Decl (void);

  // Data Accessors.

  bool imported (void);
  void set_imported (bool is_it);

  bool in_main_file (void);
  void set_in_main_file (bool is_it);

  UTL_Scope *defined_in (void);
  void set_defined_in (UTL_Scope *);

  NodeType node_type (void);

  long line (void);
  void set_line (long l);

  ACE_CString file_name (void);
  void set_file_name (ACE_CString s);

  UTL_ScopedName *name (void);

  UTL_ScopedName *compute_name (const char *prefix,
                                const char *suffix);
  // Variation of the <name>. Computes scoped name string, applying
  // prefix and suffix to the local name component.

  void set_name (UTL_ScopedName *n);

  Identifier *local_name (void);
  void local_name (Identifier *id);

  Identifier *compute_local_name (const char *prefix,
                                  const char *sufix);
  // Apply prefix and suffix to the local name and return.

  virtual const char *full_name (void);
  // Return the stringified full name.

  virtual const char *flat_name (void);
  // Return the flattened full scoped name.

  const char *repoID (void);
  void repoID (char *value);
  // Accessors for the repository ID.

  const char *prefix (void);
  void prefix (const char *value);
  // Accessors for the repository ID prefix.

  const char *version (void);
  void version (char *value);
  // Accessors for the version_ member.

  bool anonymous (void) const;
  void anonymous (bool val);
  // Accessors for the anonymous_ member.

  bool typeid_set (void) const;
  void typeid_set (bool val);
  // Accessors for the typeid_set_ member.

  void set_id_with_typeid (char *value);
  // Called by a 'typeId' declaration.

  void set_prefix_with_typeprefix (const char *value);
  // Called by a 'type_prefix' declaration.

  // If there is _cxx_ in the beginning, we will remove that and keep
  // a copy of the original name. TAO IDL's front end adds _cxx_
  // prefix to the all the reserved keywords. But when we invoke the
  // operation remotely, we should be sending only the name with out
  // "_cxx_" prefix.
  //

  Identifier *original_local_name (void);
  void original_local_name (Identifier *);

  bool added (void);
  void set_added (bool is_it);

  // Narrowing.
  DEF_NARROW_METHODS0(AST_Decl);
  DEF_NARROW_FROM_DECL(AST_Decl);

  // AST Dumping.
  virtual void dump (ACE_OSTREAM_TYPE &o);

  // Visiting.
  virtual int ast_accept (ast_visitor *visitor);

  // Cleanup method.
  virtual void destroy (void);

  // Other operations

  // Return TRUE if "this" has "s" as an ancestor.
  bool has_ancestor (AST_Decl *s);

  // Return TRUE if "this" is a child of "s".
  bool is_child (AST_Decl *s);

  bool is_nested (void);
  // Determines if we are inside of a nested scope or not.

  UTL_ScopedName *last_referenced_as (void) const;
  void last_referenced_as (UTL_ScopedName *n);

  // Accessors for the prefix_socpe_ member.
  UTL_Scope *prefix_scope (void);
  void prefix_scope (UTL_Scope *s);

  // Useful for GIOP to know if a wstring is being marshaled.
  virtual int contains_wstring (void);
  void contains_wstring (int val);

protected:
  // These are not private because they're used by
  // be_predefined_type' constructor.

  char *repoID_;
  // Repository ID.

  char *flat_name_;
  // Flattened fully scoped name.

  int contains_wstring_;
  // If we are a scope, do we contain a wstring at some level?

protected:
  void dump_i (ACE_OSTREAM_TYPE &o, const char *s) const ;

  void compute_repoID (void);
  // Computes the repoID.

  void compute_full_name (void);
  // Computes the stringified scoped name.

  void compute_flat_name (void);
  // Compute the flattened fully scoped name.

private:
  // Data

  bool pd_imported;
  // Imported?

  bool pd_in_main_file;
  // Defined in main file?

  UTL_Scope *pd_defined_in;
  // Scope.

  NodeType pd_node_type;
  // What kind of node.

  long pd_line;
  // Line defined in.

  ACE_CString pd_file_name;
  // What file defined in.

  UTL_ScopedName *pd_name;

  Identifier *pd_local_name;
  // Name in scope.

  Identifier *pd_original_local_name;
  // _cxx_ removed if any.

  bool pd_added;
  // Already added.

  char *full_name_;
  // Our full scoped name.

  char *prefix_;
  // The repository ID prefix.

  char *version_;
  // Set by #pragma version.

  bool anonymous_;
  // Are we an anonymous (no repo ID) type?

  bool typeid_set_;
  // Has our repo id been set by a typeId declaration?

  UTL_ScopedName *last_referenced_as_;
  // Temporary holder of the most recent way we were reference.
  // The top level component of this is added to pd_name_referenced.

  // The scope in which our prefix, if any, was assigned.
  UTL_Scope *prefix_scope_;

private:
  void compute_full_name (UTL_ScopedName *n);
  // Compute the full name of an AST node.

  void set_prefix_with_typeprefix_r (const char *value,
                                     UTL_Scope *appeared_in);
  // Non-top-level version of set_prefix_with_typeprefix.
};

#endif           // _AST_DECL_AST_DECL_HH
