17 lines
393 B
Text
17 lines
393 B
Text
/-
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Copyright (c) 2020 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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Authors: Leonardo de Moura
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-/
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prelude
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import Lean.Expr
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namespace Lean
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def markBorrowed (e : Expr) : Expr :=
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mkAnnotation `borrowed e
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@[export lean_is_marked_borrowed]
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def isMarkedBorrowed (e : Expr) : Bool :=
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annotation? `borrowed e |>.isSome
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end Lean
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