[il-antlr-interest: 33082] Re: [antlr-interest] Parsing Question
Hi Chris,
Very original! :)
Try to do more in lexer rules. Some of your keywords may probably also be a
part of the "instruction phrase": you need to be aware of that.
How about something like this:
grammar KnittingGrammer;
parse
: instruction+ EOF
;
instruction
: section FullStop
| castOn FullStop
;
section
: NumberDecoration Section
| Section NumberDecoration
;
castOn
: CastOn Number Stitches+ anyWordExceptStitches anyWord*
;
anyWordExceptStitches
: NumberDecoration
| Number
| Section
| Word
;
anyWord
: NumberDecoration
| Number
| Section
| Stitches
| Word
;
NumberDecoration
: Digit+ ('st' | 'nd' | 'rd' | 'th')
;
Number
: Digit+
;
FullStop
: ':'
| ';'
| ','
| '.'
| '\n'
| '\r'
;
Section
: 'section'
;
CastOn
: 'cast' Space+ 'on'
| 'co'
;
Stitches
: 'stitch' 'es'?
| '(sts)'
| 'sts'
;
Space
: (' ' | '\t') {skip();}
;
Word
: ('a'..'z' | 'A'..'Z')+
;
fragment Digit : '0'..'9';
which parses input like this properly:
1st section: cast on 63 stitches (sts) and work in pattern section as
follows:
Regards,
Bart.
On Fri, Jul 8, 2011 at 2:15 AM, Chris Wegener
wrote:
> Dear Friends-
>
>
>
> I am attempting to define a language that will let me parse knitting
> instructions. (Don't ask.)
>
>
>
> By and large it is a well understood convention with standard abbreviations
> and phrases. Occasionally the originator will insert a phrase in the
> instructions that are not directly relevant. What I would like is to parse
> out those words and deal with them around the issue of reading the
> instructions. I have tried:
>
>
>
> text :(letter)+;
>
> letter : ('a'..'z' | 'A'..'Z');
>
> WS :(' ' | '\n' | '\r');
>
>
>
> And it doesn't work at all. I changed it to:
>
>
>
> text : (letter)+;
>
> letter :~('"' | '\\');
>
> WS : (' ' | '\n' | '\r');
>
>
> That works, but becomes unweildy very quickly when I start including all of
> the things I do know to scan for. I have attached the KnittingGrammer.g
> file
> with my rules.
>
> For example:
>
> "1st Section: Cast on 63 stitches (sts) and work in pattern as follows:" is
> parsed into '1st Section:' and 'Cast on 63 stitches (sts)' which leaves the
> text until the colon which is the stop character. I would like to parse
> the
> 'and work in pattern as follows' into the parse tree under text so I can
> inspect it or lex it seperately or even display to the user.
>
> What am I missing or doing wrong?
>
> My thanks for your help in advance.
>
> Regards,
>
> Chris
>
>
>
>
>
> List: http://www.antlr.org/mailman/listinfo/antlr-interest
> Unsubscribe:
> http://www.antlr.org/mailman/options/antlr-interest/your-email-address
>
>
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
--
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to il-antlr-inter...@googlegroups.com.
To unsubscribe from this group, send email to
il-antlr-interest+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en.
[il-antlr-interest: 33083] Re: [antlr-interest] left recursion removal
Le 7 juillet 2011 17:51, John B. Brodie a écrit :
>
> change the singleStatement rule to this:
>
> singleStatement
> : IDENT ( OPEQ expression | '(' expressionList? ')' )
> | 'return' expression
> ;
>
> and delete the now unnecessary assignment rule.
And it works.
It's like watching a juggler on tv : it looks almost easy ;o)
Thanks.
--
Sébastien Kirche
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
--
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to il-antlr-inter...@googlegroups.com.
To unsubscribe from this group, send email to
il-antlr-interest+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en.
[il-antlr-interest: 33084] [antlr-interest] Are there ANTLR Consulting service?
Hi All, I have some antlr work that I need to get done a.s.a.p. Are any ANTLR Consulting services I can contact to get this work done? Rgs, James. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
[il-antlr-interest: 33086] [antlr-interest] Updated Visual Studio 2010 Extensions for ANTLR and ST4
Hello everyone, I just published updated versions of my Visual Studio 2010 extensions to the Visual Studio Gallery. Below is a note for existing users followed by a description of the extensions and links to the Visual Studio Gallery where they are published. Important: If you previously installed an early copy of the following 3 extensions, you'll need to manually uninstall them (all of them) from the "Tools -> Extension Manager." dialog before installing the new version. In the future, the extensions should update correctly without having to reinstall them. . ANTLR language support . StringTemplate 4 language support . Visual Studio Extensibility Framework With that out of the way, here is a description of the various extensions. Screenshots are available on the gallery pages for each extension. ANTLR Language Support http://visualstudiogallery.msdn.microsoft.com/25b991db-befd-441b-b23b-bb5f8d 07ee9f . Provides syntax highlighting and basic IntelliSense features for ANTLR v3 grammars. . Adds the exceptions from Antlr.Runtime and Antlr.Runtime.Tree to the Debug->Exceptions... dialog for easy configuration. StringTemplate 4 Language Support http://visualstudiogallery.msdn.microsoft.com/5ca30e58-96b4-4edf-b95e-3030da f474ff . Provides syntax highlighting and a select few IntelliSense features for StringTemplate files. . Some features are limited to the default delimiters '<' and '>'. The following extensions are not quite as developed as the two above, but I'll include them since some people may find them useful and because I used ANTLR to create them. All of these extensions are being created for one of my ongoing research projects. Java Language Support http://visualstudiogallery.msdn.microsoft.com/bc561769-36ff-4a40-9504-e266e8 706f93 PHP Language Support http://visualstudiogallery.msdn.microsoft.com/2a10ba81-26c5-47d9-939b-6bcc7b bec251 Alloy Language Support (http://alloy.mit.edu/community) http://visualstudiogallery.msdn.microsoft.com/4ae31812-f841-45c3-8052-113077 5473f8 Go Language Support (http://golang.org) http://visualstudiogallery.msdn.microsoft.com/bd7675ba-1bf5-4395-8c5a-4fc19d fc0d76 Thank you, Sam Harwell List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
