Dear, David, Thank you very much for your timely reply!
Now it is clear. It is so important to double check with experts of deal.ii. I already opened a GitHub issue: https://github.com/dealii/dealii/issues/9163 Thanks Best regards, Zhidong Brian Zhang On Wednesday, December 11, 2019 at 1:52:45 PM UTC-5, David Wells wrote: > > Dear Zhidong, > > Thanks for finding and reporting this :) > > When we compile the doxygen documentation we remove all occurrences of > > dealii:: > > since, for a variety of reasons, it's easier to pretend in the manual > that all deal.II classes are in the global namespace. This is done > with, if I recall correctly, a simple text substitution - hence, the > webpage for step-40 has > > using namespace ::LinearAlgebraPETSc > > instead of what is actually in the source file: > > using namespace dealii::LinearAlgebraPETSc > > Put another way: this text substitution is wrong for this example and > needs to be fixed. Could you help us by opening a GitHub issue to > track this problem with the documentation? > > Thanks, > David > > On Wed, Dec 11, 2019 at 1:31 PM Zhidong Brian Zhang > <[email protected] <javascript:>> wrote: > > > > Dear, Colleagues, > > > > I tried to run the code from Step-40's webpage, > > https://www.dealii.org/current/doxygen/deal.II/step_40.html > > > > However, I encountered errors: error: ‘LinearAlgebraPETSc’ is not a > namespace-name > > using namespace ::LinearAlgebraPETSc; > > > > So I compared the code from the locally installed file of Step-40 and > found there is a slight difference: > > > > Webpage: > > namespace LA > > { > > #if defined(DEAL_II_WITH_PETSC) && !defined(DEAL_II_PETSC_WITH_COMPLEX) > && \ > > !(defined(DEAL_II_WITH_TRILINOS) && defined(FORCE_USE_OF_TRILINOS)) > > using namespace ::LinearAlgebraPETSc; > > # define USE_PETSC_LA > > #elif defined(DEAL_II_WITH_TRILINOS) > > using namespace ::LinearAlgebraTrilinos; > > #else > > # error DEAL_II_WITH_PETSC or DEAL_II_WITH_TRILINOS required > > #endif > > } // namespace LA > > > > Locally installed: > > namespace LA > > { > > #if defined(DEAL_II_WITH_PETSC) && !defined(DEAL_II_PETSC_WITH_COMPLEX) > && \ > > !(defined(DEAL_II_WITH_TRILINOS) && defined(FORCE_USE_OF_TRILINOS)) > > using namespace dealii::LinearAlgebraPETSc; > > # define USE_PETSC_LA > > #elif defined(DEAL_II_WITH_TRILINOS) > > using namespace dealii::LinearAlgebraTrilinos; > > #else > > # error DEAL_II_WITH_PETSC or DEAL_II_WITH_TRILINOS required > > #endif > > } // namespace LAEnter code here... > > > > I have highlighted the difference. After adding "dealii", the program > can be run successfully. > > > > I guess maybe these are typos. I am new to deal.ii, so I am not sure my > guess is correct or not. I am just curious about this (no offence), because > I may miss some important point here. > > > > Thank you very much for your attention! > > > > Zhidong Brian Zhang > > > > -- > > The deal.II project is located at http://www.dealii.org/ > > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > > --- > > You received this message because you are subscribed to the Google > Groups "deal.II User Group" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] <javascript:>. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/6b06a25a-3812-4333-b2db-ee1cbcc9cf09%40googlegroups.com. > > > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/33f1bb79-9089-4885-b610-c1a372fdae60%40googlegroups.com.
