11 lines
361 B
Text
11 lines
361 B
Text
-- Copyright (c) 2014 Microsoft Corporation. All rights reserved.
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-- Released under Apache 2.0 license as described in the file LICENSE.
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-- Author: Leonardo de Moura
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import logic
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inductive option (A : Type) : Type :=
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| none {} : option A
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| some : A → option A
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theorem inhabited_option [instance] (A : Type) : inhabited (option A) :=
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inhabited_intro none
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