Re: Fwd: Tabs inside scalars

Yes, sorry about that. Kirill is likely the person who can answer most
definitively.

On Mon, Dec 19, 2011 at 12:59 AM, Uwe Kubosch <[email protected]> wrote:

>  This was sent to me, but was probably meant for there mailing list:
>
> Begin forwarded message:
>
>  *From: *Ingy dot Net <[email protected]>
>  *Subject: **Re: [Yaml-core] Tabs inside scalars*
>  *Date: *2011-12-17 20:01:59 GMT+01:00
>  *To: *Uwe Kubosch <[email protected]>
>
> a tab in the middle of a plain scalar should be allowed.
>
> Interestingly, the Perl binding of libyaml handles it fine, while the
> python version fails:
>
> > perl -MYAML::XS -e 'print Dump Load "x\tx"'
> --- "x\tx"
>
> > python -c 'import yaml;print yaml.dump(yaml.load("x\tx"))'
> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
>   File "/usr/lib/python2.7/dist-packages/yaml/__init__.py", line 71, in
> load
>     return loader.get_single_data()
>   File "/usr/lib/python2.7/dist-packages/yaml/constructor.py", line 37, in
> get_single_data
>     node = self.get_single_node()
>   File "/usr/lib/python2.7/dist-packages/yaml/composer.py", line 35, in
> get_single_node
>     if not self.check_event(StreamEndEvent):
>   File "/usr/lib/python2.7/dist-packages/yaml/parser.py", line 98, in
> check_event
>     self.current_event = self.state()
>   File "/usr/lib/python2.7/dist-packages/yaml/parser.py", line 143, in
> parse_implicit_document_start
>     StreamEndToken):
>   File "/usr/lib/python2.7/dist-packages/yaml/scanner.py", line 116, in
> check_token
>     self.fetch_more_tokens()
>   File "/usr/lib/python2.7/dist-packages/yaml/scanner.py", line 257, in
> fetch_more_tokens
>     % ch.encode('utf-8'), self.get_mark())
> yaml.scanner.ScannerError: while scanning for the next token
> found character '\t' that cannot start any token
>   in "<string>", line 1, column 2:
>     x    x
>      ^
>
> Kirill?
>
> On Thu, Dec 15, 2011 at 3:09 PM, Uwe Kubosch <[email protected]> wrote:
>
>> Hi!
>>
>> I have example output from Ruby 1.8 that fails to parse with SnakeYAML:
>>
>> "36L\tDIESEL" dumped from Ruby 1.8 gives "--- 36L\tDIESEL\n"
>>
>> When loaded with SnakeYAML it throws an exception:
>>
>> Exception in thread "main" while scanning for the next token
>> found character         '\t' that cannot start any token
>>  in "<string>", line 1, column 8:
>>    --- 36L     DIESEL
>>           ^
>>
>>        at
>> org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:358)
>>        at
>> org.yaml.snakeyaml.scanner.ScannerImpl.peekToken(ScannerImpl.java:202)
>>        at
>> org.yaml.snakeyaml.parser.ParserImpl$ParseDocumentEnd.produce(ParserImpl.java:265)
>>        at
>> org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:161)
>>        at
>> org.yaml.snakeyaml.parser.ParserImpl.getEvent(ParserImpl.java:171)
>>        at
>> org.yaml.snakeyaml.composer.Composer.composeDocument(Composer.java:125)
>>        at
>> org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:106)
>>        at
>> org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:121)
>>        at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:296)
>>        at org.yaml.snakeyaml.Yaml.load(Yaml.java:266)
>>        at
>> Issue136.main(Issue136.java:5)
>>
>> This is currently being tracked at
>> http://code.google.com/p/snakeyaml/issues/detail?id=136
>>
>> The question is wether the example is legal YAML.
>>
>> I have read the specs, and I find them inconclusive.  Ruby 1.8 has been
>> around for a long while, and the use of YAML with Ruby is widespread, being
>> in the standard library and all.  So I assumed that the output is legal
>> YAML and that SnakeYAML should accept it.
>>
>> Anybody got an answer on this?
>>
>> --
>> Uwe Kubosch
>> Systems Developer
>> Datek Wireless AS
>> [email protected]
>> http://datek.no/
>>
>>
>>
>>
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>
>
>  --
> Uwe Kubosch
> Systems Developer
> Datek Wireless AS
> [email protected]
> http://datek.no/
>
>
>
>
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Learn Windows Azure Live!  Tuesday, Dec 13, 2011
Microsoft is holding a special Learn Windows Azure training event for 
developers. It will provide a great way to learn Windows Azure and what it 
provides. You can attend the event by watching it streamed LIVE online.  
Learn more at http://p.sf.net/sfu/ms-windowsazure

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