Re: [boost] Heads up - string_ref landing

Subject: Re: [boost] Heads up - string_ref landing
From: Rob Stewart (robertstewart_at_[hidden])
Date: 2012-12-12 07:55:21

On Dec 12, 2012, at 2:38 AM, Yakov Galka <ybungalobill_at_[hidden]> wrote:

> On Tue, Dec 11, 2012 at 11:47 PM, Rob Stewart <robertstewart_at_[hidden]>wrote:
> 
>> On Dec 10, 2012, at 7:55 AM, Sergey Cheban <s.cheban_at_[hidden]> wrote:
>> 
>>> On 09.12.2012 17:13, Rob Stewart wrote:
>>> 
>>>>>> - safe bool or explicit bool conversion operator
>>>>> I don't think this is a good idea.
>>>> Why not?
>>> This seems to be not intuitive and not so safe.
>> 
>> It is quite intuitive to me. true means non-null, and false means null.
>> 
> 
> Would it mean !empty() or !!begin()?

The former certainly. string_ref's are never assumed to be null terminated (which is why I provide data() and not c_str()), so the latter is not sensible.

>> The std::string has no such operator.
>> 
>> Why does that matter? It's still convenient. It would be a nice addition to std::string.
>> 
> 
> std::string does not have a 'null' state.

It's the state represented by empty().

___
Rob