RE: [sv-ec] 5.7 example question

Hi, Dave.

Mantis 517-521 and 801 appear to assert that the '{} syntax is required?
Do you disagree?

Thanks,
Shalom


>-----Original Message-----
>From: Bresticker, Shalom
>Sent: Monday, November 14, 2005 9:35 AM
>To: 'Rich, Dave'; sv-ec@eda.org
>Subject: RE: [sv-ec] 5.7 example question
>
>Dave,
>
>You refer to "queue and dynamic array concatenation".
>
>However, the LRM says,
>"the source of an assignment can be a complex expression
>involving array slices or concatenations".
>
>This implies it applies to all types of arrays, not just queues
>and dynamic arrays.
>
>Please clarify.
>
>Thanks,
>Shalom
>
>>-----Original Message-----
>>From: Rich, Dave [mailto:Dave_Rich@mentor.com]
>>Sent: Thursday, November 10, 2005 6:40 PM
>>To: Bresticker, Shalom; sv-ec@eda.org
>>Subject: RE: [sv-ec] 5.7 example question
>>
>>Shalom,
>>
>>There were lots of attempts to remove overloading of the
>>concatenation
>>braces {}. Some succeeded (assignment patterns now have to be
>>preceded
>>with a ' mark}, some didn't (queue and dynamic array
>>concatenation).
>>
>>When you do a queue index operation like
>>
>>q = {q[0:$],n};
>>
>>or
>>
>>q = {q[0:pos],n,q[pos:$]);
>>
>>The queue dimension is split into its individual elements, and
>>then
>>recombined as part of the concatenation.
>>
>>This same principal can be applied to dynamic array
>dimensions.
>>
>>Dave
>>
>>
>>
>>> -----Original Message-----
>>> From: owner-sv-ec@eda.org [mailto:owner-sv-ec@eda.org] On
>>Behalf Of
>>> Bresticker, Shalom
>>> Sent: Wednesday, November 09, 2005 11:25 PM
>>> To: sv-ec@eda.org
>>> Subject: [sv-ec] 5.7 example question
>>>
>>> Hi,
>>>
>>> What do you say about the last example in 5.7 ?
>>>
>>> QUOTE:
>>> Similarly, the source of an assignment can be a complex
>>expression
>>> involving array slices or concatenations. For
>>> example:
>>>
>>> string d[1:5] = '{ "a", "b", "c", "d", "e" };
>>> string p[];
>>> p = { d[1:3], "hello", d[4:5] };
>>>
>>> The preceding example creates the dynamic array p with
>>contents: "a",
>>> "b", "c", "hello", "d", "e".
>>> :ENDQUOTE
>>>
>>> Is the assignment to p in a legal form?
>>>
>>> If so, why?
>>> If not, how should it be done?
>>>
>>> I got the following response from Brad Pierce:
>>>
>>> "I think the committees agreed to "punt" on this issue,
>>because no one
>>> provided a detailed semantics for how it was supposed to
>>work, and no
>>> entity considered the issue important enough to vote 'no'
>>over it.
>>>
>>> As far as I know, there is no other way to get the splicing
>>behavior
>>of
>>> that example.  Without it, you would need to write
>>>
>>>       p = '{ d[1], d[2], d[3], "hello", d[4], d[5] };
>>>
>>> But that methodology breaks down if the indices are
>>parameterized
>>> instead of simple literals.  In that case, the only
>>alternative is to
>>> use two for loops."
>>>
>>> Thanks,
>>> Shalom
>>>