81 lines
1.4 KiB
Forth
81 lines
1.4 KiB
Forth
\ Copyright 2021 Bradley D. Nelson
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\
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\ Licensed under the Apache License, Version 2.0 (the "License");
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\ you may not use this file except in compliance with the License.
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\ You may obtain a copy of the License at
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\
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\ http://www.apache.org/licenses/LICENSE-2.0
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\
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\ Unless required by applicable law or agreed to in writing, software
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\ distributed under the License is distributed on an "AS IS" BASIS,
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\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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\ See the License for the specific language governing permissions and
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\ limitations under the License.
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( Interpret time conditionals )
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e: test-1[if]
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1 [IF]
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: test ." hi" cr ;
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[THEN]
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test
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out: hi
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;e
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e: test-0[if]
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: test ." initial" cr ;
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0 [IF]
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: test ." hi" cr ;
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[THEN]
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test
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out: initial
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;e
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e: test-1[if][else]
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1 [IF]
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: test ." hi" cr ;
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[ELSE]
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: test ." there" cr ;
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[THEN]
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test
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out: hi
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;e
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e: test-0[if][else]
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0 [IF]
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: test ." hi" cr ;
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[ELSE]
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: test ." there" cr ;
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[THEN]
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test
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out: there
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;e
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e: test-1[if]-nesting
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1 [IF]
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: test ." foo" cr ;
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[ELSE]
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1 [IF]
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: test ." bar" cr ;
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[ELSE]
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: test ." baz" cr ;
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[THEN]
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[THEN]
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test
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out: foo
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;e
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e: test-0[if]-nesting
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0 [IF]
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1 [IF]
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: test ." foo" cr ;
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[ELSE]
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: test ." bar" cr ;
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[THEN]
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[ELSE]
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: test ." baz" cr ;
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[THEN]
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test
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out: baz
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;e
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