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parsers-generic_source-keywords.ads
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-- --
-- procedure Copyright (c) Dmitry A. Kazakov --
-- Parsers.Generic_Source.Keywords Luebeck --
-- Interface Summer, 2005 --
-- --
-- Last revision : 11:37 13 Oct 2007 --
-- --
-- This library 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 of --
-- the License, or (at your option) any later version. This library --
-- 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 --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
--____________________________________________________________________--
--
-- This generic package is used for matching keywords. An enumeration
-- type is the generic parameter of the package. The literals of the
-- type are the keywords to match. For example:
--
-- with Parsers.Multiline_Source; -- Muilti-line sources
-- ...
-- type Color_Type is (Red, Blue, White, Green);
-- package Colors is
-- new Parsers.Multiline_Source.Code.Keywords (Color_Type);
-- ...
-- loop -- Parsing loop
-- ...
-- Colors.Get (Code, Color, Got_It);
-- if not Got_It then
-- ... -- This is probably a syntax error
-- else
-- case Color is
-- when Red => -- "red" was matched
-- ...
-- when Blue => -- "blue" was matched
-- ...
--
with Tables.Names;
generic
type Keyword is (<>);
package Parsers.Generic_Source.Keywords is
--
-- Get -- Get a keyword from the source
--
-- Code - The source code
-- Token - The token matched
-- Got_It - Set to false if no token was matched
--
-- This procedure matches a keyword in Code. Matching is
-- case-insensitive. When matched the keyword value is set into Token
-- and Got_It is set to True. The source cursor is then advanced behind
-- the text matched. The longest possible token is always matched. When
-- no token matches the source Got_It is set to False.
--
procedure Get
( Code : in out Source_Type;
Token : out Keyword;
Got_It : out Boolean
);
private
package Keyword_Raw_Tables is new Tables (Keyword);
procedure Check_Spelling (Name : String);
function Check_Matched (Source : String; Pointer : Integer)
return Boolean;
package Keyword_Tables is new Keyword_Raw_Tables.Names;
end Parsers.Generic_Source.Keywords;