Re: specifying Namespace for Matrix class?

OK and thanks. I will look around or maybe just make a special case and
rename them in my old code
fritz

On Fri, Oct 15, 2021 at 11:41 AM Markus Mützel <[email protected]>
wrote:

> Maybe there are some tricks - like using wrappers - that could be used to
> place those classes in a namespace for your code.
> But out of the box, you pretty much hit it: These classes are in the
> "base" namespace (::) and might collide with other symbols of the same name
> in the "base" namespace.
>
>
> *Gesendet:* Freitag, 15. Oktober 2021 um 16:36 Uhr
> *Von:* "Fritz Sonnichsen" <[email protected]>
> *An:* "Markus Mützel" <[email protected]>
> *Cc:* [email protected]
> *Betreff:* Re: specifying Namespace for Matrix class?
> Thanks Markus for your continued help.
> Regarding the Matrix Class, I am not a very strong C++ programmer-if the
> class is not contained in a namespace does this mean there is no way to
> specify it directly as in:
> classname::Matrix ....
>   I have a huge amount of C++ code with the Matrix class and functions
> already specified (probably should have used a different more unique
> name!!!)
>
> Thanks again
> Fritz
>
> On Fri, Oct 15, 2021 at 10:18 AM Markus Mützel <[email protected]>
> wrote:
>
>> afaict, the Matrix class is currently not in a namespace:
>> GNU Octave: Matrix Class Reference
>> <https://octave.org/doxygen/stable/d3/d3f/classMatrix.html#adc245406f6dc2aec3953d6aba2bf69c3>
>>
>> HTH,
>> Markus
>>
>>
>> *Gesendet:* Freitag, 15. Oktober 2021 um 15:25 Uhr
>> *Von:* "Fritz Sonnichsen" <[email protected]>
>> *An:* [email protected]
>> *Betreff:* specifying Namespace for Matrix class?
>> I am starting with some of the octave sample code (modified below)
>> calling octave from C++. I eventually will have another Matrix class in the
>> code so I need to differentiate by namespace.
>>   I cannot find out which namespace in octave contains "Matrix" but I
>> vaguely recall it is in "math". Obviously I am wrong  per this error
>> message:
>>      matr.cpp:11:17: error: ‘Matrix’ is not a member of ‘octave::math’
>>               octave::math::Matrix a_matrix = Matrix (n, n);
>> Any ideas which namespace it is in so I can qualify it in the code?
>>
>> Thanks
>> Fritz
>>
>> =============CODE=============
>> #include <iostream>
>> #include <octave/oct.h>
>>
>> using namespace octave::math;
>>
>> int main (void)
>> {
>>   std::cout << "Hello Octave world!\n";
>>   int n = 2;
>>   octave::math::Matrix a_matrix = Matrix (n, n);
>>   for (octave_idx_type i = 0; i < n; i++)
>>     for (octave_idx_type j = 0; j < n; j++)
>>       a_matrix(i,j) = (i + 1) * 10 + (j + 1);
>>   std::cout << a_matrix;
>>   return 0;
>> }
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>


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