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+--  Semantic analysis.
+--  Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
+--
+--  GHDL is free software; you can redistribute it and/or modify it under
+--  the terms of the GNU General Public License as published by the Free
+--  Software Foundation; either version 2, or (at your option) any later
+--  version.
+--
+--  GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
+--  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+--  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+--  for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with GHDL; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+with Iirs; use Iirs;
+
+package Sem_Types is
+   --  Semantization of types (LRM93 3 / LRM08 5)
+
+   --  Semantize subtype indication DEF.
+   --  If INCOMPLETE is TRUE, then DEF may designate an incomplete type
+   --  definition.  Return either a name (denoting a type) or an anonymous
+   --  subtype definition.
+   function Sem_Subtype_Indication (Def: Iir; Incomplete : Boolean := False)
+     return Iir;
+
+   procedure Sem_Protected_Type_Body (Bod : Iir);
+
+   function Sem_Type_Definition (Def: Iir; Decl: Iir) return Iir;
+
+   --  If A_RANGE is a range (range expression or range attribute), convert it
+   --  to a subtype definition.  Otherwise return A_RANGE.
+   --  The result is a subtype indication: either a type name or a subtype
+   --  definition.
+   function Range_To_Subtype_Indication (A_Range: Iir) return Iir;
+
+   --  ATYPE is used to declare a signal.
+   --  Set (recursively) the Has_Signal_Flag on ATYPE and all types used by
+   --   ATYPE (basetype, elements...)
+   --  If ATYPE can have signal (eg: access or file type), then this procedure
+   --   returns silently.
+   procedure Set_Type_Has_Signal (Atype : Iir);
+
+   --  Return TRUE iff FUNC is a resolution function.
+   --  If ATYPE is not NULL_IIR, type must match.
+   function Is_A_Resolution_Function (Func: Iir; Atype: Iir) return Boolean;
+
+   --  Return a subtype definition copy of DEF.
+   --  This is used when an alias of DEF is required (eg: subtype a is b).
+   function Copy_Subtype_Indication (Def : Iir) return Iir;
+
+   --  Although a nature is not a type, it is patterned like a type.
+   function Sem_Subnature_Indication (Def: Iir) return Iir;
+end Sem_Types;