18 lines
415 B
Text
18 lines
415 B
Text
open tactic decidable
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definition foo (A B : Type) := A → B
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definition boo (c : bool) :=
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bool.cond c nat bool
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definition bla (a : nat) : boo (to_bool (a > 0)) → foo nat nat :=
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λ v x, a + x
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example : true :=
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by do
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bla ← mk_const "bla",
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infer_type bla >>= trace_expr,
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n ← get_arity bla,
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trace ("n arity: " + to_string n),
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when (n ≠ 3) (fail "bla is expected to have arity 3"),
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constructor
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