Re: [apps-discuss] Question about URI template and expansion of an empty list

[Erik Wilde <[e-mail]>]

hello francis.

On 2013-04-07 13:38 , Francis Galiegue wrote:
> On Fri, Apr 5, 2013 at 8:39 PM, Francis Galiegue <[e-mail]> wrote:
>> Let us say that there is a variable called "list", whose value is an empty list:
>> list = []
>> Now let us have this template:
>> X{.list}
>> Should the expansion be "X" or "X."? And, more importantly, why?
> Any insights? I have read the spec by and large (RFC 6570) and still
> cannot figure it out...

https://github.com/dret/uritemplate-test/blob/master/spec-examples-by-section.json 
(line 234) says it's "X", but i am really interested in the "why" 
explanation as well. http://tools.ietf.org/html/rfc6570#section-3.2.5 
says that "for each defined variable in the variable-list, append '.' to 
the result string and then perform variable expansion", and i cannot 
find any text saying that an empty list is considered to be undefined. i 
have read the spec recently and never looked at this particular case, 
but without looking at the test cases i would have said it has to be 
expanded to "X." and not "X".

cheers,

dret.

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