mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-25 17:38:05 +11:00
17 lines
647 B
Plaintext
17 lines
647 B
Plaintext
Flow
|
|
|
|
Note about flow words: flow words can only be used in
|
|
definitions. In the INTERPRET loop, they don't have the desired
|
|
effect because each word from the input stream is executed
|
|
immediately. In this context, branching doesn't work.
|
|
|
|
f IF A ELSE B THEN: if f is true, execute A, if false, execute
|
|
B. ELSE is optional.
|
|
BEGIN .. f UNTIL: if f is false, branch to BEGIN.
|
|
BEGIN .. AGAIN: Always branch to BEGIN.
|
|
x y DO .. LOOP: LOOP increments y. if y != x, branch to DO.
|
|
x CASE y OF A ENDOF z OF B ENDOF C ENDCASE: If x == y, execute
|
|
A, if x == z, execute B. Otherwise, execute C.
|
|
|
|
(cont.)
|