* Scope of vector
@ 2006-02-08 9:13 rashmi
2006-02-08 9:42 ` Martin Dowie
2006-02-08 10:59 ` Alex R. Mosteo
0 siblings, 2 replies; 4+ messages in thread
From: rashmi @ 2006-02-08 9:13 UTC (permalink / raw)
dear all
I am repeatedly looking-up from and appending to a float vector as
shown below. I wish to lookup the new appended vector at the end of
each loop as shown below. But the visibilty of the new appended vector
is limited to the inner Decl-Begin-End block. So kindly help me solve
this problem.
I get the feeling that if visibility is possible then vector size
cannot be updated and vice versa.
for ... loop
_______________
| |
| decl. |
| |
<-------- existing Vector is defined here (LI)
| |
_______________
| |
| Begin |
| |
| <-------- Vector to be appended will be got here (LU)
| |
__________
| | | |
| | decl. | |
| | <--------- new appended Vector is defined here (LF:=LI+LU)
__________
| | | |
| | Begin | |
| | | |
| | <------- existing Vector is to be appended here (LF)
| | | |
| | End | |
| | | |
__________
| |
| <------- How do I lookup the new appended vector here ?
| |
| End |
_______________
end loop;
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Scope of vector
2006-02-08 9:13 Scope of vector rashmi
@ 2006-02-08 9:42 ` Martin Dowie
2006-02-08 10:59 ` Alex R. Mosteo
1 sibling, 0 replies; 4+ messages in thread
From: Martin Dowie @ 2006-02-08 9:42 UTC (permalink / raw)
rashmi wrote:
[snip]
> end loop;
Sorry but you need to provide /way/ more information than that! Are you
trying to use the new Ada.Containers.* packages for this? Could you send a
/complete/ copy of the code or at least a compiling minimal subset of it?
Cheers
-- Martin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Scope of vector
2006-02-08 9:13 Scope of vector rashmi
2006-02-08 9:42 ` Martin Dowie
@ 2006-02-08 10:59 ` Alex R. Mosteo
2006-02-08 13:28 ` Ludovic Brenta
1 sibling, 1 reply; 4+ messages in thread
From: Alex R. Mosteo @ 2006-02-08 10:59 UTC (permalink / raw)
rashmi wrote:
> dear all
>
> I am repeatedly looking-up from and appending to a float vector as
> shown below. I wish to lookup the new appended vector at the end of
> each loop as shown below. But the visibilty of the new appended vector
> is limited to the inner Decl-Begin-End block. So kindly help me solve
> this problem.
>
> I get the feeling that if visibility is possible then vector size
> cannot be updated and vice versa.
>
>
> for ... loop
>
> _______________
> | |
> | decl. |
> | |
> <-------- existing Vector is defined here (LI)
> | |
> _______________
> | |
> | Begin |
> | |
> | <-------- Vector to be appended will be got here (LU)
> | |
> __________
> | | | |
> | | decl. | |
> | | <--------- new appended Vector is defined here (LF:=LI+LU)
> __________
> | | | |
> | | Begin | |
> | | | |
> | | <------- existing Vector is to be appended here (LF)
> | | | |
> | | End | |
> | | | |
> __________
> | |
> | <------- How do I lookup the new appended vector here ?
> | |
> | End |
> _______________
>
> end loop;
>
If I understand you correctly, you're attempting to reference a variable
that is already out of scope. That's basically impossible. You should
move your look-up inside the inner block.
declare
LI : constant Float_Array := Some_Initializer;
begin
declare
LF : constant Float_Array := LI & Function_Giving_LU;
begin
-- Here you can use LF
end;
-- Here you can't use LF anymore, if you are asking that.
end;
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Scope of vector
2006-02-08 10:59 ` Alex R. Mosteo
@ 2006-02-08 13:28 ` Ludovic Brenta
0 siblings, 0 replies; 4+ messages in thread
From: Ludovic Brenta @ 2006-02-08 13:28 UTC (permalink / raw)
As Alex said, the precise answer to your question (if we
understand your question well) is: you can't access LF
outside of the inner block.
But you can store the appended array in a separate
constant, which you can assess thus:
declare
LI : constant Float_Array := Some_Initializer;
LU : constant Float_Array := Function_Giving_LU;
begin
declare
LF : constant Float_Array := LI & LU;
begin
-- Here you can use all of LI, LU and LF
end;
-- Here you can use LU if you want to, but not LF.
end;
--
Ludovic Brenta.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2006-02-08 9:13 Scope of vector rashmi
2006-02-08 9:42 ` Martin Dowie
2006-02-08 10:59 ` Alex R. Mosteo
2006-02-08 13:28 ` Ludovic Brenta
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