open tactic name list

set_option pp.goal.compact true
set_option pp.binder_types true

example : ∀ (A B : Prop), A → A ∧ B → A → A :=
by do
    intro_lst [`_, `_, `H1, `H2, `H3],
    n : nat ← num_goals,
    ctx : list expr ← local_context,
    trace "Context: ",
    for_each ctx (λ e,
      do t ← infer_type e,
         fmt₁ ← pp e,
         fmt₂ ← pp t,
         trace $ fmt₁ ++ to_fmt " : " ++ fmt₂),
    trace "----------",
    trace $ "num: " ++ to_string n,
    trace_state,
    get_local `H3 >>= clear,
    (do {get_local `H3, return ()} <|> trace "get_local failed"),
    trace_state,
    assumption,
    n : nat ← num_goals,
    trace $ "num: " ++ to_string n,
    return ()