lean4-htt/tests/lean/run/quote1.lean

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open tactic list
meta_definition foo (a : qexpr) : qexpr :=
`(%%a + %%a + %%a + b)
example (a b : nat) : a = a :=
by do
a ← get_local "a",
t1 ← mk_app "add" [a, a],
t2 ← to_expr (foo (to_qexpr t1)),
trace t2,
r ← mk_app ("eq" <.> "refl") [a],
exact r