Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

chore: add refl attribute to Eq.refl #3773

Closed
wants to merge 3 commits into from
Closed

chore: add refl attribute to Eq.refl #3773

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
b9cf28f
chore: add refl attribute to Eq.refl
semorrison Mar 26, 2024
657b866
cleanup test
semorrison Mar 26, 2024
8e53de7
make the attributes earlier
semorrison Mar 26, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion src/Init/Prelude.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -278,6 +278,8 @@ inductive Eq : α → α → Prop where
equality type. See also `rfl`, which is usually used instead. -/
| refl (a : α) : Eq a a

attribute [refl] Eq.refl

/-- Non-dependent recursor for the equality type. -/
@[simp] abbrev Eq.ndrec.{u1, u2} {α : Sort u2} {a : α} {motive : α → Sort u1} (m : motive a) {b : α} (h : Eq a b) : motive b :=
h.rec m
Expand Down Expand Up @@ -320,7 +322,7 @@ Because this is in the `Eq` namespace, if you have a variable `h : a = b`,

For more information: [Equality](https://lean-lang.org/theorem_proving_in_lean4/quantifiers_and_equality.html#equality)
-/
theorem Eq.symm {α : Sort u} {a b : α} (h : Eq a b) : Eq b a :=
@[symm] theorem Eq.symm {α : Sort u} {a b : α} (h : Eq a b) : Eq b a :=
h ▸ rfl

/--
Expand Down
2 changes: 0 additions & 2 deletions tests/lean/run/rewrites.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,3 @@
attribute [refl] Eq.refl

private axiom test_sorry : ∀ {α}, α

-- To see the (sorted) list of lemmas that `rw?` will try rewriting by, use:
Expand Down
Loading