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Diffstat (limited to '')
| -rw-r--r-- | backends/lean/Base/Primitives/Base.lean | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/backends/lean/Base/Primitives/Base.lean b/backends/lean/Base/Primitives/Base.lean index 3d70c84a..9dbaf133 100644 --- a/backends/lean/Base/Primitives/Base.lean +++ b/backends/lean/Base/Primitives/Base.lean @@ -116,6 +116,13 @@ def Result.attach {α: Type} (o : Result α): Result { x : α // o = ret x } := @[simp] theorem bind_tc_div (f : α → Result β) : (do let y ← div; f y) = div := by simp [Bind.bind, bind] +@[simp] theorem bind_assoc_eq {a b c : Type u} + (e : Result a) (g : a → Result b) (h : b → Result c) : + (Bind.bind (Bind.bind e g) h) = + (Bind.bind e (λ x => Bind.bind (g x) h)) := by + simp [Bind.bind] + cases e <;> simp + ---------- -- MISC -- ---------- |