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-(************************************************************************)
-(* v * The Coq Proof Assistant / The Coq Development Team *)
-(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
-(* \VV/ **************************************************************)
-(* // * This file is distributed under the terms of the *)
-(* * GNU Lesser General Public License Version 2.1 *)
-(************************************************************************)
-
-(** Unicode utilities *)
-
-type status = Letter | IdentPart | Symbol | Unknown
-
-(** Classify a unicode char into 3 classes or unknown. *)
-val classify : int -> status
-
-(** Return [None] if a given string can be used as a (Coq) identifier.
- Return [Some (b,s)] otherwise, where [s] is an explanation and [b] is severity. *)
-val ident_refutation : string -> (bool * string) option
-
-(** First char of a string, converted to lowercase
- @raise Assert_failure if the input string is empty. *)
-val lowercase_first_char : string -> string
-
-(** Return [true] if all UTF-8 characters in the input string are just plain
- ASCII characters. Returns [false] otherwise. *)
-val is_basic_ascii : string -> bool
-
-(** [ascii_of_ident s] maps UTF-8 string to a string composed solely from ASCII
- characters. The non-ASCII characters are translated to ["_UUxxxx_"] where
- {i xxxx} is the Unicode index of the character in hexadecimal (from four
- to six hex digits). To avoid potential name clashes, any preexisting
- substring ["_UU"] is turned into ["_UUU"]. *)
-val ascii_of_ident : string -> string
-
-(** Validate an UTF-8 string *)
-val is_utf8 : string -> bool
-
-(** Return the length of a valid UTF-8 string. *)
-val utf8_length : string -> int
-
-(** Variant of {!String.sub} for UTF-8 strings. *)
-val utf8_sub : string -> int -> int -> string