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(***********************************************************************)
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(* Pierre Weis, projet Cristal, INRIA Rocquencourt *)
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(* Copyright 2001 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* only by permission. *)
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(***********************************************************************)
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| Caract�res of char list
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| Alternative of expr * expr
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| S�quence of expr * expr
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| R�p�tition of expr;;
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val lire : char Stream.t -> expr;;