Example 1 – Simple increment:

function inc

{

   var by = "{arg%argv:1}";

   if ({#by:} == 0) var by = 1;

   var result%function = "(expr){arg%value} + {by}";

}

display "2" conv=inc;               // 3

display "2" conv=inc:8;             // 10

var a = 2 conv=inc;

display "a is {a}<br> ";             // a is 3

var a conv=inc;

display "a is still {a}<br> ";       // a is still 3

Example 2 – Increment by reference:

function inc

{

   var by = "{arg%argv:1}";

   if ({#by:} == 0) var by = 1;

   var result%function = "(expr){arg%value} + {by}";

   if ({#arg%var:} > 0)

   {

         // We need to modify the variable too

         parent "{arg%var}";

         var argVar =& "{arg%var}";

         var argVar = "{result%function}";

   }

}

var a = 2 conv=inc;

display "a is {a}<br> ";             // a is 3

var a conv=inc;

display "a is now {a}<br> ";       // a is now 4

Example 3 – Increment by multiple arguments:

function inc

{

   var by = "{arg%argv:1}";

   if ({#by:} == 0) var by = 1;

   var result%function = "(expr){arg%value} + {by}";

   if ({#arg%var:} > 0)

   {

         // by reference

         parent "{arg%var}";

         var argVar =& "{arg%var}";

         clear arg%argv:0;  // The function name is out of the loop

         foreach (arg%argv)

         {

               var by = "{foreach}";

               if ({#by:} == 0) var by = 1;

               var result%function:{foreach:key}

                  = "(expr){arg%value} + {by}";

         }

         if ({#arg%var:} > 0) var argVar = "(var)result%function";

   }

}

var a = 2 conv=inc;

display "a is {a}<br> ";             // a is 3

var a conv=inc;

display "a is now {a}<br> ";       // a is now 4

var a conv=inc:10,20,30;

display "a:{a|list}<br> ";   // a:''=>'14','1'=>'14','2'=>'24','3'=>'34'