\ Copyright 2021 Bradley D. Nelson 
\ 
\ Licensed under the Apache License, Version 2.0 (the "License"); 
\ you may not use this file except in compliance with the License. 
\ You may obtain a copy of the License at 
\ 
\     http://www.apache.org/licenses/LICENSE-2.0 
\ 
\ Unless required by applicable law or agreed to in writing, software 
\ distributed under the License is distributed on an "AS IS" BASIS, 
\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
\ See the License for the specific language governing permissions and 
\ limitations under the License. 
 
( 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 
 

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