Data commit

Task/Generic-swap/Verbexx/generic-swap.verbexx

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+// user-defined swap verb -- parms are passed by alias, not value, so they can be updated:
+
+'<==> [_a] @FN [_b] { _a _b = _b _a } by_alias: ;
+
+
+// test out swap verb
+
+@VAR a = 12345;
+@VAR b = "*****";
+
+@SAY "a=" a "   b=" b;
+
+\b <==> \a;                    // "\" verb prevents evaluation of a and b here,
+                               // so they can be passed by alias to <==>
+@SAY "a=" a "   b=" b;
+
+a b = b a;                     // swap them back, just using the usual  =  verb
+
+@SAY "a=" a "   b=" b;