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collapseos/blk/426
Virgil Dupras 4501313410 Add [IF] .. [THEN]
Will be useful as kinds of "#ifdef"s during xcomp.
2020-04-28 08:28:59 -04:00

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: ELSE ( a1 -- a2 | a1: IF cell a2: ELSE cell )
COMPILE (br)
2 ALLOT
DUP H@ -^ SWAP ( a-H a )
!
H@ 2- ( push a. -2 for allot offset )
; IMMEDIATE
: [IF]
IF EXIT THEN
LIT< [THEN] BEGIN DUP WORD S= UNTIL DROP ;
: [THEN] ;