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(* This Source Code Form is subject to the terms of the Mozilla Public License,
  v. 2.0. If a copy of the MPL was not distributed with this file, You can
  obtain one at https://mozilla.org/MPL/2.0/. *)

proc isdigit*(c: Int ) -> Int
extern

proc isalnum*(c: Int) -> Int
extern

proc isalpha*(c: Int) -> Int
extern

proc isspace*(c: Int) -> Int
extern

proc tolower*(c: Int) -> Int
extern

proc toupper*(c: Int) -> Int
extern

end.