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Implements the basic stack operations. This is intentionally kept minimal, though additional primitives can be added to improve overall performance.
stack_dup() Duplicate the TOS stack_drop() Drop the TOS stack_swap() Exchange TOS and NOS stack_to_r() Push TOS to return stack, DROP TOS stack_from_r() Pop TORS to the data stack stack_depth() Return the number of items on the stack
dup drop swap >r r> depth
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Notebook exported on Sunday, 1 July 2007, 19:54:43 PM EDT