lean2/tests/lean/run/rewrite8.lean

import data.nat
open nat
constant f : nat → nat

theorem tst1 (x y : nat) (H1 : (λ z, z + 0) x = y) : f x = f y :=
by rewrite [▸* at H1, nat.add_zero at H1, H1]
feat(library/tactic/rewrite_tactic): add reduction step to rewrite tactic 2015-02-05 21:42:50 +00:00			`import data.nat`
			`open nat`
			`constant f : nat → nat`

			`theorem tst1 (x y : nat) (H1 : (λ z, z + 0) x = y) : f x = f y :=`
refactor(library/data/nat/basic): mark some theorems as protected to avoid overloading 2015-10-14 19:27:09 +00:00			`by rewrite [▸* at H1, nat.add_zero at H1, H1]`