* #IS_FALSE ( flag -- ) ( state-save mfth-if-magic flag -- ) checks the condition on the CS-STACK. Pairs with #IF better use the ANSI style [IF] [ELSE] [THEN] construct.
#IS_FALSE
( flag -- )
( state-save mfth-if-magic flag -- )
CS-STACK
#IF
[IF]
[ELSE]
[THEN]
FORTH/BASE cdecl immediate primitive