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139 | -- Abstract :
--
-- Test grammar generator with an Ada-like association syntax. In an
-- earlier version of OpenToken, this grammar reported spurious
-- conflicts.
--
-- Copyright (C) 2002, 2003, 2009, 2010, 2013, 2014 Stephen Leake. All Rights Reserved.
--
-- This program is free software; you can redistribute it and/or
-- modify it under terms of the GNU General Public License as
-- published by the Free Software Foundation; either version 3, or (at
-- your option) any later version. This program 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
-- distributed with this program; see file COPYING. If not, write to
-- the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
-- MA 02111-1307, USA.
--
with Ada.Strings.Maps.Constants;
with OpenToken.Production.List;
with OpenToken.Production.Parser.LALR.Generator;
with OpenToken.Production.Parser.LALR.Parser;
with OpenToken.Production.Parser.LALR.Parser_Lists;
with OpenToken.Recognizer.Character_Set;
with OpenToken.Recognizer.End_Of_File;
with OpenToken.Recognizer.Identifier;
with OpenToken.Recognizer.Integer;
with OpenToken.Recognizer.Separator;
with OpenToken.Text_Feeder.String;
with OpenToken.Token.Enumerated.Analyzer;
with OpenToken.Token.Enumerated.Identifier;
with OpenToken.Token.Enumerated.Integer;
with OpenToken.Token.Enumerated.List;
with OpenToken.Token.Enumerated.Nonterminal;
package Association_Token_Test is
type Token_ID_Type is
(Whitespace_ID,
-- terminals
Comma_ID,
Equals_Greater_ID,
Identifier_ID,
Int_ID,
Paren_Left_ID,
Paren_Right_ID,
-- last terminal
EOF_ID,
-- non-terminals
Aggregate_ID,
Association_ID,
Association_List_ID,
Statement_ID);
Token_Image_Width : Integer := Token_ID_Type'Width;
package Master_Token is new OpenToken.Token.Enumerated (Token_ID_Type, Comma_ID, EOF_ID, Token_ID_Type'Image);
package Token_List is new Master_Token.List;
package Nonterminal is new Master_Token.Nonterminal (Token_List);
package Identifier_Token is new Master_Token.Identifier;
package Integer_Literal is new Master_Token.Integer;
package Production is new OpenToken.Production (Master_Token, Token_List, Nonterminal);
package Production_List is new Production.List;
package Tokenizer is new Master_Token.Analyzer;
package Parser is new Production.Parser (Tokenizer);
package LALRs is new Parser.LALR (First_State_Index => 1);
First_Parser_Label : constant := 1;
package Parser_Lists is new LALRs.Parser_Lists (First_Parser_Label);
package LALR_Parser is new LALRs.Parser (First_Parser_Label, Parser_Lists);
package LALR_Generator is new LALRs.Generator (Token_Image_Width, Production_List);
package Tokens is
-- For use in right hand sides, syntax.
Comma : constant Master_Token.Class := Master_Token.Get (Comma_ID);
EOF : constant Master_Token.Class := Master_Token.Get (EOF_ID);
Equals_Greater : constant Master_Token.Class := Master_Token.Get (Equals_Greater_ID);
Identifier : constant Master_Token.Class := Identifier_Token.Get (Identifier_ID);
Integer : constant Master_Token.Class := Integer_Literal.Get (Int_ID);
Paren_Left : constant Master_Token.Class := Master_Token.Get (Paren_Left_ID);
Paren_Right : constant Master_Token.Class := Master_Token.Get (Paren_Right_ID);
end Tokens;
Syntax : constant Tokenizer.Syntax :=
(
-- terminals
Whitespace_ID => Tokenizer.Get
(OpenToken.Recognizer.Character_Set.Get (OpenToken.Recognizer.Character_Set.Standard_Whitespace)),
Comma_ID => Tokenizer.Get (OpenToken.Recognizer.Separator.Get (",")),
Equals_Greater_ID => Tokenizer.Get (OpenToken.Recognizer.Separator.Get ("=>")),
Int_ID => Tokenizer.Get
(OpenToken.Recognizer.Integer.Get,
New_Token => Integer_Literal.Get (Int_ID)),
Identifier_ID => Tokenizer.Get
(Recognizer => OpenToken.Recognizer.Identifier.Get
(Start_Chars => Ada.Strings.Maps.Constants.Alphanumeric_Set,
Body_Chars => Ada.Strings.Maps.Constants.Alphanumeric_Set),
New_Token => Tokens.Identifier),
Paren_Left_ID => Tokenizer.Get (OpenToken.Recognizer.Separator.Get ("(")),
Paren_Right_ID => Tokenizer.Get (OpenToken.Recognizer.Separator.Get (")")),
EOF_ID => Tokenizer.Get (OpenToken.Recognizer.End_Of_File.Get, Tokens.EOF)
);
String_Feeder : aliased OpenToken.Text_Feeder.String.Instance;
use type Production.Instance; -- "<="
use type Production_List.Instance; -- "and"
use type Production.Right_Hand_Side; -- "+"
use type Token_List.Instance; -- "&"
-- For use in right or left hand sides
Aggregate : constant Nonterminal.Class := Nonterminal.Get (Aggregate_ID);
Association : constant Nonterminal.Class := Nonterminal.Get (Association_ID);
Association_List : constant Nonterminal.Class := Nonterminal.Get (Association_List_ID);
Statement : constant Nonterminal.Class := Nonterminal.Get (Statement_ID);
-- valid syntax:
-- (identifier)
-- (identifier, identifier)
-- (identifier => identifier)
-- (integer => identifier)
-- (identifier => identifier, integer => identifier)
Full_Grammar : constant Production_List.Instance :=
Statement <= Aggregate & Tokens.EOF and
Aggregate <= Tokens.Paren_Left & Association_List & Tokens.Paren_Right + Nonterminal.Synthesize_Self and
Association_List <= Association & Tokens.Comma & Association_List + Nonterminal.Synthesize_Self and
Association_List <= Association + Nonterminal.Synthesize_Self and
Association <= Tokens.Identifier & Tokens.Equals_Greater & Tokens.Identifier +
Nonterminal.Synthesize_Self and
Association <= Tokens.Integer & Tokens.Equals_Greater & Tokens.Identifier + Nonterminal.Synthesize_Self and
Association <= Tokens.Identifier + Nonterminal.Synthesize_Self;
end Association_Token_Test;
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