A Tiny Parser Generator v1.2

// Tiny Parser Generator v1.0
// Copyright © Herre Kuijpers 2008-2010
// this grammar describes the BNF notation
// Terminals:
BRACKETOPEN      	-> @"\(\s*";
BRACKETCLOSE     	-> @"\s*\)";
CODEBLOCK     	-> @"\s*\{[^\}]*\}\s*([^\}]*\}\s*)*;" { return "some code"; };
ATTRIBUTESKIP    	-> @"\s*\[Skip]\s*";
PIPE             	-> @"\s*\|\s*";
SEMICOLON        	-> @"\s*;";
UNARYOPER         -> @"\s*(\*|\+|\?)";
IDENTIFIER        -> @"[a-zA-Z_][a-zA-Z0-9_]*";
ARROW             -> @"\s*->\s*";
EOF               -> @"^\s*$";
WHITESPACE        -> @"\s+";
REGEX             -> @"@?\""(\""\""|[^\""])*\""";

[Skip]
COMMENTLINE       -> @"//[^\n]*\n?";

[Skip]
COMMENTBLOCK      -> @"\s+/\*[^*]*\*+(?:[^/*][^*]*\*+)*/";

// Production lines LL(1):
Start             -> ( WHITESPACE* ExtProduction )* EOF { return "hello world"; };
ExtProduction     -> (Attribute)* Production;
Attribute	      -> ATTRIBUTESKIP;
Production        -> IDENTIFIER ARROW Rule (CODEBLOCK | SEMICOLON);
Rule              -> REGEX | Subrule { return 0; };
Subrule           -> Symbol (BinaryOper Symbol )* ;
Symbol            -> (IDENTIFIER | BRACKETOPEN Subrule BRACKETCLOSE ) UNARYOPER? ;
BinaryOper        -> WHITESPACE | PIPE;

/*
First symbols:
Start: WHITESPACE ATTRIBUTESKIP IDENTIFIER EOF 
ExtProduction: ATTRIBUTESKIP IDENTIFIER 
Attribute: ATTRIBUTESKIP 
Production: IDENTIFIER 
Rule: REGEX IDENTIFIER BRACKETOPEN UNARYOPER 
Subrule: IDENTIFIER BRACKETOPEN UNARYOPER 
Symbol: IDENTIFIER BRACKETOPEN UNARYOPER 
BinaryOper: WHITESPACE PIPE 
Statement: CODEBLOCK SEMICOLON 

Skips symbols: COMMENTLINE COMMENTBLOCK
*/