[antlr-interest] Parsing tab delimited datamatrix

[Martin Eklund]

Hi,

I'm a complete newbie when it comes to ANTLR and would be very thankful
to get a few pointers. I would like to parse a file containing a tab
delimited datamatrix. The first row of the file contains column headers,
whereas all the other rows contain first an identifier and then doubles
separated by tabs. Ex:

I'd	like	to	parse
this	12.3	1.2	3
type	1.54	5	21.1
of	12.3	1	4
file	7	1	4.9

During the parsing I would like to put the column header identifiers
into a array of string, the row "header" identifiers into another aray
of strings and the doubles into a jama matrix (basically just a
double[][]). My idea is that the wee parser and lexer below is pretty
much what I need. However, I suppose I need to add some actions where
the start are (please see below). The problem is what to add... How do I
for instance know how big to make the String[] and the double[][]..?


============================================================
class pcmParser extends Parser;

// Match one-or-more column headers
columnHeaders
	: (TEXT)+ NEWLINE
	***** What goes here? *****
	;
rows
	:TEXT (NUM)+
	***** And what goes here? *****
	;

class pcmLexer extends Lexer;

TEXT	options { testLiterals = true;}
	:('a'..'z'|'A'..'Z'|'0'..'9'|'_')+
	;

DIGIT   : '0'..'9' ;

NUM     : (DIGIT)+ ('.' (DIGIT)+ )? ;

WS
	: (	' '
	|	'\t'
	)
	{$setType(Token.SKIP);}
	;

NEWLINE
    :   '\r' '\n'   // DOS
    |   '\n'        // UNIX
    ;
============================================================

Thank you in advance for any help!

Cheers,

Martin.


-- 
========================================
Martin Eklund
PhD Student
Department of Pharmaceutical Biosciences
Uppsala University, Sweden
Ph: +46-18-4714281
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