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Supergrammar2.txt
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Supergrammar2.txt
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// MetaphysicsIndustries.Giza - A Parsing System
// Copyright (C) 2008-2022 Metaphysics Industries, Inc.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
// USA
/*****************************************************************************
* *
* Supergrammar2.txt *
* 22 April 2013 *
* Project: MetaphysicsIndustries.FortranLib *
* Written by: Richard Sartor *
* *
* The new supergrammar - defines grammars with a parser/lexer distinction. *
* *
*****************************************************************************/
// idea:
// #whitespace [ \t\r\n]
// #auto-token [=;<>,()|:]
//
grammar = definition+;
definition = defmod* identifier '=' expr ';';
defmod = '<' defmod-item ( ',' defmod-item )* '>';
defmod-item = ( dm-suppressed? dm-token | dm-ignore dm-case );
expr = ( subexpr | orexpr )+;
orexpr = '(' expr ( '|' expr )* ')' modifier?;
subexpr = ( identifier | literal | charclass ) modifier? ( ':' identifier:tag )?;
// tokens
<token> dm-token = 'token';
<token> dm-ignore = 'ignore';
<token> dm-case = 'case';
<token> dm-suppressed = 'suppressed';
<token> number = [\d]+;
<token> identifier = [\w-_] [\w-_\d]*;
<token> literal = '\'' ( [^\\'] | '\\' [wldsrnt\\'] | unicodechar )+ '\'';
<token> charclass = '[' '^'? ( [^\\\[\]] | '\\' [wldsrnt\\\[\]] | unicodechar )+ ']';
<ignore case> unicodechar = '\\x' [\dabcdef][\dabcdef][\dabcdef][\dabcdef];
<suppressed token> comment = ( '/*' ( [^*] | '*'+ [^*/] )* '*'+ '/' | '//' [^\r\n]* [\r\n]+ );
<token> modifier = [*+?];