5e24120dba
This PR improves support for nonstandard `Int`/`Nat` instances in `grind` and `simp +arith`. Closes #11745
15 lines
492 B
Text
15 lines
492 B
Text
class Preorder (α : Type u) extends LE α
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instance instPreorderInt : Preorder Int where
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example (c x : Int) (mx : @LE.le Int instPreorderInt.toLE x c) : x ≤ c := by
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grind -order
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example (c x : Int) (mx : @LE.le Int instPreorderInt.toLE (x + (-1) * c) 0) : x ≤ c := by
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grind -order
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example (c x : Int) (mx : @LE.le Int instPreorderInt.toLE x c) : x ≤ c := by
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lia -order
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example (c x : Int) (mx : @LE.le Int instPreorderInt.toLE (x + (-1) * c) 0) : x ≤ c := by
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lia -order
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