20 lines
483 B
Text
20 lines
483 B
Text
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],
|
|
trace_state,
|
|
h2 ← get_local `H2,
|
|
infer_type h2 >>= trace,
|
|
h1 ← get_local `H1,
|
|
h3 ← get_local `H3,
|
|
unify h1 h3,
|
|
(unify h2 h3 <|> trace "fail to unify H2 =?= H3"),
|
|
assumption,
|
|
trace_state,
|
|
result >>= trace,
|
|
trace "--------------",
|
|
return ()
|