Re: Example 6.23 and 6.24 in YAML 1.2 spec dated 2009-07-21

Osamu TAKEUCHI <[email protected]> Wed, 30 Sep 2009 19:08:52 +0900

Newsgroups	gmane.text.yaml.general
Message-ID	<[email protected]>

Oren,

>> On Wed, 2009-09-30 at 15:08 +0900, Osamu TAKEUCHI wrote:
>>> If you think the current spec accepts the example 6.23 and 6.24,
>>> please clarify how.
>> It does since YamlReference works :-)
> 
> Fmm, can I check the source code for the YamlReference anywhere?
> I couldn't find it. Probably I'm overlooking.

Oops, I really overlooked it.
It was so obvious. :(


Ok, I found the reason why YamlReference works correctly.

> s_l__block_collection n c {- 200 -} = ( s_separate (n .+ 1) c & c_ns_properties (n .+ 1) c & ( s_l_comments >?) ?)
>                                     & s_l_comments
>                                     & ( l__block_sequence (seq_spaces n c)
>                                       / l__block_mapping n )


I'm not good at Haskell but this seems the key.

>> & ( s_l_comments >?)

I very much dislike this.
But, meanwhile, it can be an ugly work around to have the rule [200] as:

s-l+block-collection(n,c) ::= ( s-separate(n+1,c)  c-ns-properties(n+1,c) /* followed by s_l_comments */ )?
                              s-l-comments
                              ( l+block-sequence(seq-spaces(n,c))
                                | l+block-mapping(n) ) 

Best,
Osamu TAKEUCHI

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