+: begin? ( obj -- obj bool )
+ begin-symbol tagged-list? ;
+
+: begin-actions ( obj -- actions )
+ cdr ;
+
+: eval-sequence ( explist env -- finalexp env )
+ ( Evaluates all bar the final expressions in
+ an an expression list. The final expression
+ is returned to allow for tail optimization. )
+
+ 2swap ( env explist )
+
+ \ Abort on empty list
+ 2dup nil objeq? if 2swap exit then
+
+ begin
+ 2dup cdr ( env explist nextexplist )
+ 2dup nil objeq? false =
+ while
+ -2rot car 2over ( nextexplist env exp env )
+ eval
+ 2drop \ discard result
+ 2swap ( env nextexplist )
+ repeat
+
+ 2drop car 2swap ( finalexp env )
+;
+