[antlr-interest] Re: Questions about learning ANTLR

[Hensley, Richard]

Ok, now the whole thing makes sense. There are two approaches to having
literal strings in parser rules. 

1) put double quoted strings directly in parser rules 
2) create a tokens { } section with literal strings, and 
   reference the tokens in parser rules 

Thanks for helping me to clarify this whole topic. 

Richard 

-----Original Message----- 
From: Terence Parr [ mailto:parrt at jguru.com <mailto:parrt at jguru.com> ] 
Sent: Monday, October 07, 2002 11:37 AM 
To: antlr-interest at yahoogroups.com 
Subject: Re: [antlr-interest] Re: Questions about learning ANTLR 



On Monday, October 7, 2002, at 10:47  AM, mzukowski at yci.com wrote: 

> I think you're right, it sounds like a mistake. 

This bit me just last night myself.  Option is actually the "tokens 
{...}" option, right not literals {...}? ;) 

Ter 
> 
> Monty 
> 
> -----Original Message----- 
> From: Hensley, Richard [ mailto:richard.hensley at mckesson.com
<mailto:richard.hensley at mckesson.com> ] 
> Sent: Monday, October 07, 2002 9:51 AM 
> To: 'antlr-interest at yahoogroups.com' 
> Subject: RE: [antlr-interest] Re: Questions about learning ANTLR 
> 
> 
> Monty, 
> I use the "testLiterals" option in my grammar's. However, I was 
> referring to 
> the "literals" option as indicated in this sentence that is just 
> before the 
> one that refers to the "testLiterals" option. 
> "Second, literals may be specified in the lexer grammar by means of
the 
> literal option." 
> The word literal is a link, and refers to "options.html#literal" which

> is 
> not on options page. I don't think it exists, and is a mistake in the 
> documentation. 
> I would be happy to give some opinionated feedback about how the web 
> site 
> could be structured. I will put some thought into it. 
> Richard 
> -----Original Message----- 
> From: mzukowski at yci.com [ mailto:mzukowski at yci.com
<mailto:mzukowski at yci.com> ] 
> Sent: Monday, October 07, 2002 9:40 AM 
> To: antlr-interest at yahoogroups.com 
> Subject: RE: [antlr-interest] Re: Questions about learning ANTLR 
> 
> 
> It's at http://www.antlr.org/doc/options.html#_bb8
<http://www.antlr.org/doc/options.html#_bb8> . 
> By the way, Ter (and I'm gonna help) is about to embark upon a 
> restructuring 
> 
> of the docs and website.  It would help a lot if you could explain how

> the 
> documentation should be, in your opinion. 
> Monty 
> -----Original Message----- 
> From: Hensley, Richard [ mailto:richard.hensley at mckesson.com
<mailto:richard.hensley at mckesson.com> ] 
> Sent: Monday, October 07, 2002 8:45 AM 
> To: 'antlr-interest at yahoogroups.com' 
> Subject: RE: [antlr-interest] Re: Questions about learning ANTLR 
> 
> 
> Monty, 
> Thanks for the link. When I read that chunk of documentation, I 
> interpreted 
> it to mean any double quoted string, including those specified in a 
> tokens 
> section. It turns out that I got lucky I guess, because double quoted 
> strings in a tokens section are placed in the literals table. All that

> being 
> 
> said, I'm not sure it matters whether double quoted string literals
are 
> specified in the tokens section, or inline. On examining the code, 
> I've been 
> 
> unable to find sigficant function differences. 
> BTW, I was unable to find the literal option referred to in the 
> documentation. Do anybody know what it is? 
> Richard 
> -----Original Message----- 
> From: mzukowski at yci.com [ mailto:mzukowski at yci.com
<mailto:mzukowski at yci.com> ] 
> Sent: Monday, October 07, 2002 8:01 AM 
> To: antlr-interest at yahoogroups.com 
> Subject: RE: [antlr-interest] Re: Questions about learning ANTLR 
> 
> 
> http://www.antlr.org/doc/lexer.html#_bb7
<http://www.antlr.org/doc/lexer.html#_bb7>  
> -----Original Message----- 
> From: Hensley, Richard [ mailto:richard.hensley at mckesson.com
<mailto:richard.hensley at mckesson.com> ] 
> Sent: Friday, October 04, 2002 4:40 PM 
> To: 'antlr-interest at yahoogroups.com' 
> Subject: RE: [antlr-interest] Re: Questions about learning ANTLR 
> 
> 
> Monty, 
> Where in the documentation does it talk about keywords being specified

> as 
> literals? I want to check it out to make sure I didn't screw up my 
> grammars, 
> 
> and give bad advice. 
> Richard 
> .... 
> 
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> 
-- 
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Creator, ANTLR Parser Generator: http://www.antlr.org
<http://www.antlr.org>  
Lecturer in Comp. Sci., University of San Francisco 


  

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