16 lines
388 B
C
16 lines
388 B
C
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/*
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Copyright (c) 2013 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 "expr.h"
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namespace lean {
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/**
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\brief Return true if the given expression has free variables.
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*/
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bool has_free_vars(expr const & a);
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inline bool closed(expr const & a) { return !has_free_vars(a); }
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}
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