67 lines
812 B
Forth
67 lines
812 B
Forth
( Interpret time conditionals )
|
|
|
|
e: test-1[if]
|
|
1 [IF]
|
|
: test ." hi" cr ;
|
|
[THEN]
|
|
test
|
|
out: hi
|
|
;e
|
|
|
|
e: test-0[if]
|
|
: test ." initial" cr ;
|
|
0 [IF]
|
|
: test ." hi" cr ;
|
|
[THEN]
|
|
test
|
|
out: initial
|
|
;e
|
|
|
|
e: test-1[if][else]
|
|
1 [IF]
|
|
: test ." hi" cr ;
|
|
[ELSE]
|
|
: test ." there" cr ;
|
|
[THEN]
|
|
test
|
|
out: hi
|
|
;e
|
|
|
|
e: test-0[if][else]
|
|
0 [IF]
|
|
: test ." hi" cr ;
|
|
[ELSE]
|
|
: test ." there" cr ;
|
|
[THEN]
|
|
test
|
|
out: there
|
|
;e
|
|
|
|
e: test-1[if]-nesting
|
|
1 [IF]
|
|
: test ." foo" cr ;
|
|
[ELSE]
|
|
1 [IF]
|
|
: test ." bar" cr ;
|
|
[ELSE]
|
|
: test ." baz" cr ;
|
|
[THEN]
|
|
[THEN]
|
|
test
|
|
out: foo
|
|
;e
|
|
|
|
e: test-0[if]-nesting
|
|
0 [IF]
|
|
1 [IF]
|
|
: test ." foo" cr ;
|
|
[ELSE]
|
|
: test ." bar" cr ;
|
|
[THEN]
|
|
[ELSE]
|
|
: test ." baz" cr ;
|
|
[THEN]
|
|
test
|
|
out: baz
|
|
;e
|