lean2/tests/lean/run/tactic8.lean

import standard
using tactic

theorem tst {A B : Bool} (H1 : A) (H2 : B) : A ∧ B ∧ A
:= by (apply @and_intro;
       apply (show A, from H1);
       apply (show B ∧ A, from and_intro H2 H1))

check @tst