NEW:      Common.ch
------------------------------------------------------------------------------

     Common.ch has been added to the CA-Clipper 5.2 release.  Common.ch
     incorporates many common/useful pseudofunctions and commands.  Std.ch is
     now reserved for CA-Clipper language implementation ONLY.  A listing of
     the current contents of Common.ch follows:

     /***
     *
     *  Common.ch
     *
     *  Commonly used definitions
     *
     *  Copyright (c) 1993, Computer Associates International, Inc.
     *  All rights reserved.
     *
     */

     #define TRUE  .T.
     #define FALSE .F.
     #define YES   .T.
     #define NO    .F.

     #translate ISNIL( <v1> )         => ( <v1> == NIL )
     #translate ISARRAY( <v1> )       => ( valtype( <v1> ) == "A" )
     #translate ISBLOCK( <v1> )       => ( valtype( <v1> ) == "B" )
     #translate ISCHARACTER( <v1> )   => ( valtype( <v1> ) == "C" )
     #translate ISDATE( <v1> )        => ( valtype( <v1> ) == "D" )
     #translate ISLOGICAL( <v1> )     => ( valtype( <v1> ) == "L" )
     #translate ISMEMO( <v1> )        => ( valtype( <v1> ) == "M" )
     #translate ISNUMBER( <v1> )      => ( valtype( <v1> ) == "N" )
     #translate ISOBJECT( <v1> )      => ( valtype( <v1> ) == "O" )

     #xcommand DEFAULT <v1> TO <x1> [, <vn> TO <xn> ]  ;
               =>                                      ;
               IF <v1> == NIL ; <v1> := <x1> ; END     ;
               [; IF <vn> == NIL ; <vn> := <xn> ; END ]

     #command UPDATE <v1> IF <exp> TO <v2> ;
     |         =>                          ;
                IF <exp> ; <v1> := <v2> ; END