Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
dd87739fc2
This PR adds missing `grind` normalization rules for `natCast` and `intCast` Examples: ``` open Lean.Grind variable (R : Type) (a b : R) section CommSemiring variable [CommSemiring R] example (m n : Nat) : (m + n) • a = m • a + n • a := by grind example (m n : Nat) : (m * n) • a = m • (n • a) := by grind end CommSemiring section CommRing variable [CommRing R] example (m n : Nat) : (m + n) • a = m • a + n • a := by grind example (m n : Nat) : (m * n) • a = m • (n • a) := by grind example (m n : Int) : (m * n) • (a * b) = (m • a) * (n • b) := by grind end CommRing ``` |
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