Kill implicit joining of adjacent strings

[Andrei Alexandrescu]

On 11/12/10 4:41 AM, Steven Schveighoffer wrote:
> On Fri, 12 Nov 2010 04:53:23 -0500, Andrei Alexandrescu
> <SeeWebsiteForEmail at erdani.org> wrote:
>
>> On 11/12/10 1:06 AM, Don wrote:
>>> Andrei Alexandrescu wrote:
>>>> On 11/11/10 5:59 PM, Walter Bright wrote:
>>>>> Andrei Alexandrescu wrote:
>>>>>> Let me ask a related question: if there were a priority list of
>>>>>> things
>>>>>> that Walter should be busy with, where would this feature be on that
>>>>>> list?
>>>>>
>>>>> For once, I agree with Bearophile. The adjacent string
>>>>> concatenation was
>>>>> a very very early feature, and the ~ completely supplants it. While I
>>>>> don't think it causes many problems, it's a pointless redundancy and
>>>>> should be removed.
>>>>
>>>> I agree too but there are many similarly good ideas (some of which
>>>> from himself) that are older.
>>>>
>>>> Andrei
>>>
>>> This isn't new. I remember this one being discussed about seven years
>>> ago.
>>
>> Well put me on board then. Walter, please don't forget to tweak the
>> associativity rules: var ~ " literal " ~ " literal " concatenates
>> literals first.
>
> You mean *should* concatenate literals first? I think currently it doesn't.
>
> -Steve

Yah, "shall" as they say in Standardese :o). Currently it doesn't, but 
you get to catenate literals by juxtaposition. For example, this expression:

s ~ "def" "ghi"

when naively changed to

s ~ "def" ~ "ghi"

will do more work than before. We must avoid that.


Andrei