36 lines
1.3 KiB
Text
36 lines
1.3 KiB
Text
rewrite_set simple
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add_rewrite Nat::add_comm Nat::add_left_comm Nat::add_assoc Nat::add_zeror : simple
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variables a b c : Nat
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(*
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function indent(s)
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for i = 1, s:depth()-1 do
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io.write(" ")
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end
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end
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local m = simplifier_monitor(function(s, e)
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indent(s)
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print("Visit, depth: " .. s:depth() .. ", " .. tostring(e))
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end,
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function(s, e, new_e, pr)
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indent(s)
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print("Step: " .. tostring(e) .. " ===> " .. tostring(new_e))
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end,
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function(s, e, new_e, ceq, ceq_id)
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-- if ceq_id == name("Nat", "add_assoc") then
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indent(s)
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print("Rewrite using: " .. tostring(ceq_id))
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indent(s)
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print(" " .. tostring(e) .. " ===> " .. tostring(new_e))
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-- end
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end
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)
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local s = simplifier("simple", options(), m)
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local t = parse_lean('a + (b + 0) + a')
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print(t)
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print("=====>")
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local t2, pr = s(t)
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print(t2)
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print(pr)
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get_environment():type_check(pr)
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*)
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