Re: [boost] Heads up - string_ref landing

Subject: Re: [boost] Heads up - string_ref landing
From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2012-12-13 23:48:44

On Dec 13, 2012, at 9:05 AM, Gottlob Frege <gottlobfrege_at_[hidden]> wrote:

> On Thu, Dec 13, 2012 at 5:20 AM, Rob Stewart <robertstewart_at_[hidden]>wrote:
> 
>>>> 
>>>> It is the logical interpretation. It indicates whether the string is
>>>> non-empty. I don't see any other generally useful interpretation, do
>> you?
>>> 
>>> Qt's QString has both empty() and isNull() and they are not always the
>> same.  Basically empty() is a zero-byte string, but null is a
>>> never-been-set-or-allocated string.
>> [snip]
>> 
>>> Somewhat like optional<string>.
>> 
>> That's how I'd spell it.
> 
> 
> Me too maybe.  But either way, there is another 'generally useful
> interpretation'.  And fairly well known.
> 
> For string_ref, it could mean the difference between these 2 string_refs,
> assuming a ptr+size implementation:
> 
> { ptr != 0,  size == 0 } and { ptr == 0, size == hopefully_zero }

Just added another set of tests for string_refs.

All zero length string_refs are ==

-- Marshall

Marshall Clow     Idio Software   <mailto:mclow.lists_at_[hidden]>

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