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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S C N --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2000 Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT 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 distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package contains the lexical analyzer routines. This is used both
-- for scanning Ada source files and also for scanning Ada project files.
with Casing; use Casing;
with Types; use Types;
package Scn is
procedure Initialize_Scanner
(Unit : Unit_Number_Type;
Index : Source_File_Index);
-- Initialize lexical scanner for scanning a new file. The caller has
-- completed the construction of the Units.Table entry for the specified
-- Unit and Index references the corresponding source file. A special
-- case is when Unit = No_Unit_Number, and Index corresponds to the
-- source index for reading the configuration pragma file.
procedure Scan;
-- Scan scans out the next token, and advances the scan state accordingly
-- (see package Scan_State for details). If the scan encounters an illegal
-- token, then an error message is issued pointing to the bad character,
-- and Scan returns a reasonable substitute token of some kind.
function Scan_First_Char return Source_Ptr;
-- This routine returns the position in Source of the first non-blank
-- character on the current line, used for certain error recovery actions.
procedure Scan_Reserved_Identifier (Force_Msg : Boolean);
-- This procedure is called to convert the current token, which the caller
-- has checked is for a reserved word, to an equivalent identifier. This is
-- of course only used in error situations where the parser can detect that
-- a reserved word is being used as an identifier. An appropriate error
-- message, pointing to the token, is also issued if either this is the
-- first occurrence of misuse of this identifier, or if Force_Msg is True.
function Determine_Token_Casing return Casing_Type;
pragma Inline (Determine_Token_Casing);
-- Determines the casing style of the current token, which is
-- either a keyword or an identifier. See also package Casing.
end Scn;
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