30 lines
942 B
Text
30 lines
942 B
Text
/-
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Copyright (c) 2016 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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prelude
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import init.meta.mk_dec_eq_instance init.subtype init.meta.occurrences init.sum
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open tactic subtype
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universe variables u v
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attribute [instance]
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def subtype_decidable_eq {A : Type u} {p : A → Prop} [decidable_eq A] : decidable_eq {x : A // p x} :=
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by mk_dec_eq_instance
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set_option trace.app_builder true
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attribute [instance]
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def list_decidable_eq {A : Type u} [decidable_eq A] : decidable_eq (list A) :=
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by mk_dec_eq_instance
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attribute [instance]
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def occurrences_decidable_eq : decidable_eq occurrences :=
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by mk_dec_eq_instance
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attribute [instance]
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def unit_decidable_eq : decidable_eq unit :=
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by mk_dec_eq_instance
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attribute [instance]
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def sum_decidable {A : Type u} {B : Type v} [decidable_eq A] [decidable_eq B] : decidable_eq (A ⊕ B) :=
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by mk_dec_eq_instance
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