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Diffstat (limited to 'test-suite/ssr/if_isnt.v')
-rw-r--r-- | test-suite/ssr/if_isnt.v | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test-suite/ssr/if_isnt.v b/test-suite/ssr/if_isnt.v new file mode 100644 index 00000000..b8f6b773 --- /dev/null +++ b/test-suite/ssr/if_isnt.v @@ -0,0 +1,22 @@ +(************************************************************************) +(* * The Coq Proof Assistant / The Coq Development Team *) +(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *) +(* <O___,, * (see CREDITS file for the list of authors) *) +(* \VV/ **************************************************************) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(* * (see LICENSE file for the text of the license) *) +(************************************************************************) + +(* (c) Copyright 2006-2016 Microsoft Corporation and Inria. *) + +Require Import ssreflect. + + +Definition unopt (x : option bool) := + if x isn't Some x then false else x. + +Lemma test1 : unopt None = false /\ + unopt (Some false) = false /\ + unopt (Some true) = true. +Proof. by auto. Qed. |