ea6eee516b
Motivation: use same separator used in lambda expressions as in other programming languages.
37 lines
1.3 KiB
Text
37 lines
1.3 KiB
Text
/-
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Copyright (c) 2019 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 init.lean.attributes
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namespace Lean
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inductive ReducibilityStatus
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| reducible | semireducible | irreducible
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instance ReducibilityStatus.inhabited : Inhabited ReducibilityStatus := ⟨ReducibilityStatus.semireducible⟩
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def mkReducibilityAttrs : IO (EnumAttributes ReducibilityStatus) :=
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registerEnumAttributes `reducibility
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[(`reducible, "reducible", ReducibilityStatus.reducible),
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(`semireducible, "semireducible", ReducibilityStatus.semireducible),
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(`irreducible, "irreducible", ReducibilityStatus.irreducible)]
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@[init mkReducibilityAttrs]
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constant reducibilityAttrs : EnumAttributes ReducibilityStatus := default _
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@[export lean.get_reducibility_status_core]
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def getReducibilityStatus (env : Environment) (n : Name) : ReducibilityStatus :=
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match reducibilityAttrs.getValue env n with
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| some s => s
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| none => ReducibilityStatus.semireducible
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@[export lean.set_reducibility_status_core]
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def setReducibilityStatus (env : Environment) (n : Name) (s : ReducibilityStatus) : Environment :=
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match reducibilityAttrs.setValue env n s with
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| Except.ok env => env
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| _ => env -- TODO(Leo): we should extend EnumAttributes.setValue in the future and ensure it never fails
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end Lean
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