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harbour-core/harbour/source/rtl/tscalar.prg
Przemyslaw Czerpak f2b0c25e87 2007-09-18 14:40 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl) 
* harbour/include/hbclass.ch
    + added new commands for scalar classes:
         ASSOCIATE CLASS <ClassName> WITH TYPE
                           ARRAY|BLOCK|CHARACTER|DATE|HASH|LOGICAL|NIL|
                           NUMERIC|POINTER|SYMBOL
         ENABLE CLASS TYPE ALL
         ENABLE TYPE CLASS ARRAY|BLOCK|CHARACTER|DATE|HASH|LOGICAL|NIL|
                           NUMERIC|POINTER|SYMBOL
      Please remeber that:
          ENABLE CLASS TYPE ALL
      and:
          ENABLE TYPE CLASS ...
      can be used in any place of code - this commands are translated to
          REQUEST HB<TYPENAME>
      so are not executed

  * harbour/source/vm/classes.c
    + added __clsAssocType( <hClass>, <cType> ) => <lOK>

  * harbour/common.mak
  * harbour/source/rtl/tscalar.prg
  * harbour/source/rtl/Makefile
  + harbour/source/rtl/tscalars.c
  + harbour/source/rtl/tscalard.c
  + harbour/source/rtl/tscalarh.c
  + harbour/source/rtl/tscalarl.c
  + harbour/source/rtl/tscalarp.c
  + harbour/source/rtl/tscalara.c
  + harbour/source/rtl/tscalaru.c
  + harbour/source/rtl/tscalarb.c
  + harbour/source/rtl/tscalarn.c
  + harbour/source/rtl/tscalarc.c
    + added scalar classes for basic types,
      Now it's possible to define messages also for basic item types.
      It's even possible to overload some not defined in HVM operators,
      f.e. in this example we overload operator "+" so it makes
        AADD( <aValue>, <xValue> )
      for code like <aValue> + <xValue>:
        #include "hbclass.ch"
        PROC MAIN()
            LOCAL a:={}
            ASSOCIATE CLASS MyArray WITH TYPE ARRAY
            a := a + "elem1"
            a += "elem2"
            a := a + "elem3"
            a += "elem4"
            ? a:asString, a:isScalar
            AEVAL(a,{|x,i|QOUT(i,x)})
        RETURN
        CREATE CLASS MyArray INHERIT __HBArray
           OPERATOR "+" ARG xValue INLINE AADD( Self, xValue ), Self
        ENDCLASS
      Operators which have default actions for given types defined in HVM
      cannot be overloaded.
2007-09-18 12:40:49 +00:00

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/*
* $Id$
*/
/*
* Harbour Project source code:
* Harbour implementation of Class(y) Scalar classes
*
* Copyright 2004 Antonio Linares <alinares@fivetechsoft.com>
* www - http://www.harbour-project.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
/* Class(y) documentation is located at:
http://www.clipx.net/ng/classy/ngdebc.php */
#include "hbclass.ch"
/* -------------------------------------------- */
CREATE CLASS ScalarObject FUNCTION HBScalar
METHOD Copy()
METHOD IsScalar()
METHOD AsString()
METHOD AsExpStr()
MESSAGE Become METHOD BecomeErr() /* a scalar cannot "become" another object */
MESSAGE DeepCopy METHOD Copy()
ENDCLASS
METHOD Copy() CLASS ScalarObject
RETURN Self
METHOD IsScalar() CLASS ScalarObject
RETURN .T.
METHOD AsString() CLASS ScalarObject
SWITCH ValType( Self )
CASE "B" ; RETURN "{ || ... }"
CASE "M"
CASE "C" ; RETURN Self
CASE "D" ; RETURN DToC( Self )
CASE "H" ; RETURN "{ ... => ... }"
CASE "L" ; RETURN iif( Self, ".T.", ".F." )
CASE "N" ; RETURN LTrim( Str( Self ) )
CASE "S" ; RETURN "@" + Self:name + "()"
CASE "P" ; RETURN "<0x...>"
CASE "U" ; RETURN "NIL"
ENDSWITCH
RETURN "Error!"
METHOD AsExpStr() CLASS ScalarObject
SWITCH ValType( Self )
CASE "M"
CASE "C" ; RETURN '"' + Self + '"'
CASE "D" ; RETURN 'CToD("' + DToC( Self ) + '")'
ENDSWITCH
RETURN ::AsString()
METHOD BecomeErr() CLASS ScalarObject
// Not implemented yet
// ::error( CSYERR_BECOME, "Message 'become' illegally sent to scalar", ::ClassName() )
RETURN NIL
/* -------------------------------------------- */
CREATE CLASS Array INHERIT HBScalar FUNCTION __HBArray
METHOD Init()
METHOD AsString()
METHOD At
METHOD AtPut()
METHOD Add
METHOD AddAll()
METHOD Collect()
METHOD Copy()
METHOD Do()
METHOD DeleteAt()
METHOD InsertAt()
METHOD IndexOf()
METHOD IsScalar()
METHOD Remove()
METHOD Scan()
METHOD _Size() // assignment method
ENDCLASS
METHOD Init( nElements ) CLASS Array
::size := iif( nElements == NIL, 0, nElements )
RETURN Self
METHOD AddAll( aOtherCollection ) CLASS Array
aOtherCollection:Do( {| e | ::Add( e ) } )
RETURN Self
METHOD AsString() CLASS Array
RETURN "{ ... }"
METHOD At( n ) CLASS Array
RETURN Self[ n ]
METHOD AtPut( n, x ) CLASS Array
RETURN Self[ n ] := x
METHOD Add( x ) CLASS Array
AAdd( Self, x )
RETURN .T.
METHOD Collect( b ) CLASS Array
LOCAL i
LOCAL currElem
LOCAL result := {}
LOCAL nElems := Len( Self )
FOR i := 1 to nElems
currElem := Self[ i ]
IF Eval( b, currElem )
AAdd( result, currElem )
ENDIF
NEXT
RETURN result
METHOD Copy() CLASS Array
RETURN ACopy( Self, Array( Len( Self ) ) )
METHOD DeleteAt( n ) CLASS Array
IF n > 0 .AND. n <= Len( Self )
ADel( Self, n )
ASize( Self, Len( Self ) - 1 )
ENDIF
RETURN Self
METHOD InsertAt( n, x ) CLASS Array
IF n > Len( Self )
ASize( Self, n )
Self[ n ] := x
ELSEIF n > 0
ASize( Self, Len( Self ) + 1 )
AIns( Self, n )
Self[ n ] := x
ENDIF
RETURN Self
METHOD IsScalar() CLASS Array
RETURN .T.
METHOD Do( b ) CLASS Array
LOCAL i
FOR i := 1 TO Len( Self )
b:Eval( Self[ i ], i )
NEXT
RETURN Self
METHOD IndexOf( x ) CLASS Array
LOCAL elem
FOR EACH elem IN Self
IF elem == x
RETURN elem:__enumIndex()
ENDIF
NEXT
RETURN 0
METHOD Remove( e ) CLASS Array
::DeleteAt( ::IndexOf( e ) )
RETURN NIL
METHOD Scan( b ) CLASS Array
RETURN AScan( Self, b )
METHOD _Size( newSize ) CLASS Array
ASize( Self, newSize )
RETURN newSize // so that assignment works according to standard rules
/* -------------------------------------------- */
CREATE CLASS Block INHERIT HBScalar FUNCTION __HBBlock
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Block
RETURN "{ || ... }"
/* -------------------------------------------- */
CREATE CLASS Character INHERIT HBScalar FUNCTION __HBCharacter
METHOD AsString()
METHOD AsExpStr()
ENDCLASS
METHOD AsString() CLASS Character
RETURN Self
METHOD AsExpStr() CLASS Character
RETURN '"' + Self + '"'
/* -------------------------------------------- */
CREATE CLASS Date INHERIT HBScalar FUNCTION __HBDate
METHOD AsString()
METHOD AsExpStr()
ENDCLASS
METHOD AsString() CLASS Date
RETURN DToC( Self )
METHOD AsExpStr() CLASS Date
RETURN 'CToD("' + ::AsString() + '")'
/* -------------------------------------------- */
CREATE CLASS Hash INHERIT HBScalar FUNCTION __HBHash
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Hash
RETURN "{ ... => ... }"
/* -------------------------------------------- */
CREATE CLASS Logical INHERIT HBScalar FUNCTION __HBLogical
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Logical
RETURN iif( Self, ".T.", ".F." )
/* -------------------------------------------- */
CREATE CLASS Nil INHERIT HBScalar FUNCTION __HBNil
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Nil
RETURN "NIL"
/* -------------------------------------------- */
CREATE CLASS Numeric INHERIT HBScalar FUNCTION __HBNumeric
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Numeric
RETURN LTrim( Str( Self ) )
/* -------------------------------------------- */
CREATE CLASS Symbol INHERIT HBScalar FUNCTION __HBSymbol
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Symbol
RETURN "@" + Self:name + "()"
/* -------------------------------------------- */
CREATE CLASS Pointer INHERIT HBScalar FUNCTION __HBPointer
METHOD AsString()
ENDCLASS
METHOD AsString() CLASS Pointer
RETURN "<0x...>"
/* -------------------------------------------- */
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