Here is an idea to make for-loop code more readable: a word called DOWNTO
which adjusts that starting index by one so the bounds act like an
incrementing LOOP .

COMPILER

\ DOWNTO subtracts one from the starting index of DO limits for a
decrementing -1 +LOOP so that the number of iterations is the same as if the
loop were counting up. e.g. 2 0 DO +1 +LOOP vs. 0 2 DOWNTO DO -1 +LOOP

: DOWNTO ( -- ) ( a-addr1 a-addr2 -- a-addr1 a-addr2' ) POSTPONE 1- ;
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Received on Mon Nov 29 2004 - 12:06:47 PST