6a0f11f705
This commit also changes the semantics of the unify tactic. It fails if the arguments are not unifiable.
42 lines
840 B
Text
42 lines
840 B
Text
open tactic bool
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constant foo {A : Type} [inhabited A] (a b : A) : a = default A → a = b
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example (a b : nat) : a = 0 → a = b :=
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by do
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intro "H",
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apply (expr.const "foo" [level.of_nat 1]),
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trace_state,
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assumption
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definition ex : inhabited (nat × nat × bool) :=
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by apply_instance
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set_option pp.all true
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print ex
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set_option pp.all false
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example (a b : nat) : a = 0 → a = b :=
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by do
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intro "H",
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apply_core (expr.const "foo" [level.of_nat 1]) transparency.semireducible tt ff,
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trace_state,
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a ← get_local "a",
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trace_state,
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mk_app ("inhabited" <.> "mk") [a] >>= exact,
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trace "--------",
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trace_state,
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assumption
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print "----------------"
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set_option pp.all true
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example (a b : nat) : a = 0 → a = b :=
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by do
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intro "H",
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foo ← mk_const "foo",
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trace_expr foo,
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apply foo,
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trace_state,
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assumption
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