// fe_interface_header.h,v 1.9 2002/01/31 19:27:20 parsons Exp

/*

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Copyright 1992, 1993, 1994 Sun Microsystems, Inc.  Printed in the United
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This product is protected by copyright and distributed under the following
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The Interface Definition Language Compiler Front End (CFE) is made
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this product is incorporated in whole or part. You may copy and extend
functionality (but may not remove functionality) of the Interface
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and documentation for the Interface Definition Language CFE.

INTERFACE DEFINITION LANGUAGE CFE IS PROVIDED AS IS WITH NO WARRANTIES OF
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 */

#ifndef _FE_INTERFACE_HEADER_FE_INTERFACE_HH
#define _FE_INTERFACE_HEADER_FE_INTERFACE_HH

// FE_InterfaceHeader
//
// Internal class for FE to describe interface headers
//
// FE_obv_header
// Internal class for FE to describe valuetype headers
//

/*
** DEPENDENCIES: utl_scoped_name.hh, ast_interface.hh, utl_scope.hh,
**               ast_decl.hh
**
** USE: Included from fe.hh
*/

class TAO_IDL_FE_Export FE_InterfaceHeader
{
public:
  // Operations

  // Constructor(s)
  FE_InterfaceHeader (UTL_ScopedName *n,
                      UTL_NameList *l,
                      UTL_NameList *supports = 0,
                      idl_bool compile_now = 1);

  virtual ~FE_InterfaceHeader (void);

  // Data Accessors
  UTL_ScopedName *interface_name (void);
  AST_Interface **inherits (void);
  long n_inherits (void);
  AST_Interface **inherits_flat (void);
  long n_inherits_flat (void);

  virtual idl_bool is_local (void);
  // See if we are a local interface.

  virtual idl_bool is_abstract (void);
  // See if we are an abstract interface.

  // Data
protected:
  UTL_ScopedName        *pd_interface_name;     // Interface name
private:
  // Used for eventual code generation
  AST_Interface         **pd_inherits;          // Inherited interfaces
  long                  pd_n_inherits;          // How many

  // Used for name clash checking
  AST_Interface         **pd_inherits_flat;     // All ancestors
  long                  pd_n_inherits_flat;     // How many

  // Operations

  // Compile the flattened unique list of interfaces which this
  // interface inherits from
protected:
  void                  compile_inheritance(UTL_NameList *l,
                                            UTL_NameList *supports);
private:
  void                  compile_one_inheritance(AST_Interface *i);

  // called from compile_inheritance()
  virtual idl_bool check_first (AST_Interface *i);
  virtual idl_bool check_further (AST_Interface *i);
  virtual idl_bool check_supports (AST_Interface *i);
};


class FE_Local_InterfaceHeader : public FE_InterfaceHeader
{
public:
  FE_Local_InterfaceHeader (UTL_ScopedName *n,
                            UTL_NameList *l,
                            UTL_NameList *supports = 0);

  virtual idl_bool is_local (void);
  // See if we are a local interface.
};

class FE_Abstract_InterfaceHeader : public FE_InterfaceHeader
{
public:
  FE_Abstract_InterfaceHeader (UTL_ScopedName *n,
                               UTL_NameList *l,
                               UTL_NameList *supports = 0);

  virtual idl_bool is_abstract (void);
  // See if we are a local interface.
};

class FE_obv_header : public FE_InterfaceHeader
{
public:

  // Constructor(s)
  FE_obv_header(UTL_ScopedName *n, UTL_NameList *l, UTL_NameList *supports);
  virtual ~FE_obv_header() {}

  // Data Accessors
  void valuetype_name (UTL_ScopedName *n);
  long n_concrete ();

 private:

  // called from compile_inheritance()
  virtual idl_bool check_first (AST_Interface *i);
  virtual idl_bool check_further (AST_Interface *i);
  virtual idl_bool check_supports (AST_Interface *i);

  idl_bool truncatable_;  /* currently 0, ignored */
  long n_concrete_;
};

#endif           // _FE_INTERFACE_HEADER_FE_INTERFACE_HH
