lean4-htt/tests/lean/1293.lean

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open expr tactic
example : true := by whnf (var 0) >> return ()
example : true := by whnf (app (var 0) (var 0)) >> return ()
example : true := by head_zeta (var 0) >> return ()
example : true := by unify (var 0) (var 0) >> return ()
example : true := by is_def_eq (var 0) (var 0) >> return ()
example foo trivial := by do
t ← infer_type (var 0),
to_expr `(trivial) >>= apply