15 lines
434 B
C++
15 lines
434 B
C++
/*
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Copyright (c) 2015 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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*/
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#pragma once
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#include "kernel/expr.h"
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namespace lean {
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namespace blast {
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/** \brief Return true iff \c e is of the form (not a) or (a -> false), and false otherwise */
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bool is_not(expr const & e, expr & a);
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bool is_not(expr const & e);
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bool is_false(expr const & e);
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}}
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