19eac5f341
This PR ensures that the configuration in `Simp.Config` is used when reducing terms and checking definitional equality in `simp`. closes #5455 --------- Co-authored-by: Kim Morrison <kim@tqft.net>
13 lines
472 B
Text
13 lines
472 B
Text
namespace Option
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variable {α : Type _}
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instance liftOrGet_isCommutative (f : α → α → α) [Std.Commutative f] :
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Std.Commutative (liftOrGet f) :=
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⟨fun a b ↦ by cases a <;> cases b <;> simp [liftOrGet, Std.Commutative.comm]⟩
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instance liftOrGet_isAssociative (f : α → α → α) [Std.Associative f] :
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Std.Associative (liftOrGet f) :=
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⟨fun a b c ↦ by cases a <;> cases b <;> cases c <;> simp [liftOrGet, Std.Associative.assoc]⟩
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end Option
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