lean2/library/standard/data/string.lean
2014-08-20 18:04:31 -07:00

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-- Copyright (c) 2014 Microsoft Corporation. All rights reserved.
-- Released under Apache 2.0 license as described in the file LICENSE.
-- Author: Leonardo de Moura
import data.bool
using bool inhabited
namespace string
inductive char : Type :=
| ascii : bool → bool → bool → bool → bool → bool → bool → bool → char
inductive string : Type :=
| empty : string
| str : char → string → string
theorem char_inhabited [instance] : inhabited char :=
inhabited_mk (ascii ff ff ff ff ff ff ff ff)
theorem string_inhabited [instance] : inhabited string :=
inhabited_mk empty
end string