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Re: [Toon-members] Re: STL containers with TooN
From: |
Gerhard Reitmayr |
Subject: |
Re: [Toon-members] Re: STL containers with TooN |
Date: |
Wed, 13 Jan 2010 11:04:02 +0100 |
>
> just from reading docs, one needs default, copy constructors and assignment
> to work. that makes sense for example with the following code:
>
> vector<Vector<Dynamic> > v(10); // 10 dynamic vectors
> v[0] = Vector<Dynamic>(10); // set first to a vector with 10 els
> v[1] = Vector<Dynamic>(20); // set second to a vector with 20 els
>
> Resizable makes sense, i guess that assignment on a Resizable should always
> work (and resize as necessary)
>
> For Dynamic, how about making it stateful and have the default constructor
> set a sentinel that allows it to be resized with the first assignment ? (and
> assert, if it is assigned from another Dynamic in the same state )? a copy
> constructor or explicit size constructor will not allow further resizing,
> similarly after the first resize. that way the code above would work and one
> would still have the same runtime safety...
>
just got bitten again by the missing default constructor for Vector<Dynamic>.
How about the above suggestion ? this we could have them default constructed
and fixed on first assignment ?
cheers,
Gerhard
> cheers,
> Gerhard
>
>> Thoughts, anyone?
>>
>> -Ed
>>
>>
>>
>>> Thanks!
>>>
>>> Am 10.01.2010 um 21:37 schrieb Gabriel Nützi:
>>>
>>>> Hello again
>>>> Sorry for my questions, but I am using TooN permanently, with all its
>>>> advantages... (LU,SymEigen....)
>>>> I was wondering, because I need a container which is as fallowing
>>>> list < Vector<Dynamic,double> > myList;
>>>> Why does it give RunTime problems and segmentation errors when I try to
>>>> use the list by inserting and deleting Vectors, it happens also when the
>>>> Vector is not dynamic ...
>>>> Is there any troubles with the containers and TooN?
>>>> This crashed in Runtime:
>>>> //===================================
>>>> list < Vector<Dynamic,double> > myList;
>>>> myList.push_back( makeVector (1,1,1) );
>>>> myList.push_back( makeVector (2,1,1) );
>>>> myList.push_back( makeVector (3,1,1) );
>>>> list < Vector<Dynamic,double> > ::iterator it;
>>>> it = myList.begin();
>>>> it++;
>>>> myList.erase(it);
>>>> //=================================
>>>> Thanks a lot
>>>> Gabriel!
>>>
>>>
>>>
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>>
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--
Gerhard Reitmayr
Institute for Computer Graphics and Vision
http://www.icg.tugraz.at/Members/gerhard
tel: ++43 316 873 5082