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diff --git a/sem_stmts.ads b/sem_stmts.ads
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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_Stmts is
-   --  Semantize declarations and concurrent statements of BLK, which is
-   --  either an architecture_declaration, and entity_declaration or
-   --  a block_statement.
-   --  If SEM_DECLS is true, then semantize the declarations of BLK.
-   procedure Sem_Block (Blk: Iir; Sem_Decls : Boolean);
-
-   --  Analyze the concurrent statements of PARENT.
-   procedure Sem_Concurrent_Statement_Chain (Parent : Iir);
-
-   --  Some signals are implicitly declared.  This is the case for signals
-   --  declared by an attribute ('stable, 'quiet and 'transaction).
-   --  Note: guard signals are also implicitly declared, but with a guard
-   --   expression, which is located.
-   --  Since these signals need resources and are not easily located (can be
-   --  nearly in every expression), it is useful to add a node into a
-   --  declaration list to declare them.
-   --  However, only a few declaration_list can declare signals.  These
-   --  declarations lists must register and unregister themselves with
-   --  push_declarative_region_with_signals and
-   --  pop_declarative_region_with_signals.
-   type Implicit_Signal_Declaration_Type is private;
-
-   procedure Push_Signals_Declarative_Part
-     (Cell: out Implicit_Signal_Declaration_Type; Decls_Parent : Iir);
-
-   procedure Pop_Signals_Declarative_Part
-     (Cell: in Implicit_Signal_Declaration_Type);
-
-   -- Declare an implicit signal.
-   procedure Add_Declaration_For_Implicit_Signal (Sig : Iir);
-
-   --  Semantize declaration chain and sequential statement chain
-   --  of BODY_PARENT.
-   --  DECL is the declaration for these chains (DECL is the declaration, which
-   --   is different from the bodies).
-   --  This is used by processes and subprograms semantization.
-   procedure Sem_Sequential_Statements (Decl : Iir; Body_Parent : Iir);
-
-   --  Sem for concurrent and sequential assertion statements.
-   procedure Sem_Report_Statement (Stmt : Iir);
-
-   -- Get the current subprogram or process.
-   function Get_Current_Subprogram return Iir;
-   pragma Inline (Get_Current_Subprogram);
-
-   --  Get the current concurrent statement, or NULL_IIR if none.
-   function Get_Current_Concurrent_Statement return Iir;
-   pragma Inline (Get_Current_Concurrent_Statement);
-
-   --  Current PSL default_clock declaration.
-   --  Automatically saved and restore while analyzing concurrent statements.
-   Current_Psl_Default_Clock : Iir;
-
-   --  Add a driver for SIG.
-   --  STMT is used in case of error (it is the statement that creates the
-   --   driver).
-   --  Do nothing if:
-   --    The current statement list does not belong to a process,
-   --    SIG is a formal signal interface.
-   procedure Sem_Add_Driver (Sig : Iir; Stmt : Iir);
-private
-   type Implicit_Signal_Declaration_Type is record
-      Decls_Parent : Iir;
-      Last_Decl : Iir;
-   end record;
-
-end Sem_Stmts;