pretty-printer for not equal

2023-10-28 22:00:41 +02:00
parent b24987fc19
commit 14ce186239
3 changed files with 30 additions and 0 deletions
--- a/test/ne.lean
+++ b/test/ne.lean
@@ -0,0 +1,14 @@
+import Game.Metadata
+
+example (a : ℕ) : a = 0 ∨ ¬ (a = 0) := by
+  by_cases h : a = 0
+  · left
+    exact h
+  · right
+    -- here the goal should show `h : a ≠ 0`
+    exact h
+
+-- set_option pp.all true in
+example (a : ℕ) : ¬ (a = 0) ↔ a ≠ 0 := by
+  -- both should be displayed the same way
+  rfl