... we now test 200x200 matrices
... we disable the eigenvector test and use the eigenvalue/eigenvector test as it is numerically more stable

Merge branch 'feature/fix-optional-assignment' into 'master'

ref:core/dune-common This fixes a bug in the assignment operator of
Std::optional which may invoke undefined by moving from an l-value reference.
The MR also adds two related checks:

-   Check that assignment does not move from l-value references.
-   Check that assignment does move from r-values.

See merge request [!722]

  [!722]: gitlab.dune-project.org/core/dune-common/merge_requests/722

Using `std::move` with a forwarding reference
will also move from l-value references which
invokes undefined behaviour if the reference
is used afterwards.

Merge branch 'feature/add-std-identity' into 'master'

ref:core/dune-common

### What does this MR do?

This is an approved struct for the C++20 standard. The implementation comes
from the [suggested implementation in cppreference.com].

### Can this MR be accepted?

-   [x] Implemented
-   [x] Added test
-   [x] Pipeline passing
-   [x] Added entry to CHANGELOG.md

### Related issues

See merge request [!696]

  [suggested implementation in cppreference.com]: https://en.cppreference.com/w/cpp/utility/functional/identity
  [!696]: gitlab.dune-project.org/core/dune-common/merge_requests/696

Santiago Ospina De Los Ríos authored 5 years ago and Christoph Grüninger committed 5 years ago

This is an approved struct for the C++20 standard. The implementation
comes from the suggested implementation in cppreference.com

Merge branch 'feature/rename-git-commit-hook' into 'master'

ref:core/dune-common Fixes [#178]

See merge request [!720]

  [#178]: gitlab.dune-project.org/NoneNone/issues/178
  [!720]: gitlab.dune-project.org/core/dune-common/merge_requests/720


Closes #178

Ansgar Burchardt authored 5 years ago and Christoph Grüninger committed 5 years ago

The name git-whitespace-hook is a bit too generic for a DUNE-specific
tool.

Merge branch 'feature/remove-transition-code-from-autotools' into 'master'

ref:core/dune-common Autotools is gone quite some time now. No need to keep
this tools.

See merge request [!719]

  [!719]: gitlab.dune-project.org/core/dune-common/merge_requests/719

Merge branch 'feature/nonblocking_mpi' into 'master'

ref:core/dune-common This MR adds nonblocking communication methods to
CollectiveCommunication<MPI_Comm>.

Furthermore we introduced a class MPIData that stores an object or a reference
and provides information for sending and receiving the object or reference
(pointer, length, MPI_Datatype). That works with objects that are represented
consecutively in memory (e.g. std::string, std:::vector, Dune::DynamicVector),
but could be extended for generic datatypes e.g. used with serialization. The
MPIData object is stored within the MPIFuture to ensure that the object stays
alive until the communication is complete (does not work with references, of
course).

For examples see mpifuturetest.cc.

TODO:

-   [x] Add fallback methods to CollectiveCommunication<void>
-   [x] Add nonblocking MPI benchmark

See merge request [!526]

  [!526]: gitlab.dune-project.org/core/dune-common/merge_requests/526

Autotools is gone quite some time now. No need to keep this tools.

Merge branch 'feature/extend-ptparser-1' into 'master'

ref:core/dune-common The parametertree parser can now handle

\[prefix\] \# comment key = value

See merge request [!246]

  [!246]: gitlab.dune-project.org/core/dune-common/merge_requests/246


Closes #54

Merge branch 'bugfix/eigenvalues-fieldmatrix' into 'master'

ref:core/dune-common

-   changed parameter w to lwork to be consistent with documentation of dsyev
    (lapack)
-   set parameter lwork to 3\*n-1 see dsyev for eigenvalue calculation for dim
    \< 3

See merge request [!277]

  [!277]: gitlab.dune-project.org/core/dune-common/merge_requests/277

Merge branch 'issue/aligned_allocator' into 'master'

ref:core/dune-common This fixes [#111]

### Summary

Added a cmake compile-test to check whether the used standard library provides
the function aligned_alloc(). The Dune::AlignedAllocator implementation is
adapted, using the introduced config variable DUNE_HAVE_C_ALIGNED_ALLOC.

### Motivation

I have added a cmake test for standard library function aligned_alloc() since
it cannot be detected in the code whether this function exists. The old test
`#if __APPLE__` was not enough. E.g. on our cluster, the standard library does
not support aligned_alloc() for some reasons and thus, the compile fails to
compile the AlignedAllocator, although there are alternatives already
implemented.

### TODO

Additionally, I've added an error message if neither aligned_alloc nor
posix_memalign is available on a system. But, since I do not have an Apple
system I cannot test this completely.

The branch can be merged when someone confirms, that the condition

    #if !(DUNE_HAVE_C_ALIGNED_ALLOC || (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600))

works fine on systems with Apple's standard library. This test assumes that a
posix library of a minimal version always provides the posix_memalign()
function.

Maybe an additional cmake compile-test should be added to test for this
function as well.

See merge request [!436]

  [#111]: gitlab.dune-project.org/NoneNone/issues/111
  [!436]: gitlab.dune-project.org/core/dune-common/merge_requests/436


Closes #111

Merge branch 'bugfix/set-python-interpreter-for-virtualenv' into 'master'

ref:core/dune-common This makes sure that the python version in the virtualenv
matches the one found during configuration.

See merge request [!671]

  [!671]: gitlab.dune-project.org/core/dune-common/merge_requests/671

Merge branch 'fix-failing-mpiguard-test' into 'master'

ref:core/dune-common For MPT with gcc 6.x the template parameter C somehow
became an anonymous enum leading to usage of GenericGuardCommunicator as an
abstract class.

This is an attempt to fix this. It is mostly guess work, though.

Partial fix for [#76]

See merge request [!266]

  [#76]: gitlab.dune-project.org/NoneNone/issues/76
  [!266]: gitlab.dune-project.org/core/dune-common/merge_requests/266

Merge branch 'fix/add-include-for-visual-c++' into 'master'

See merge request [!718]

  [!718]: Nonecore/dune-common/merge_requests/718

Merge branch 'CheckCXXFeatures-support-for-cxx20' into 'master'

See merge request [!717]

  [!717]: Nonecore/dune-common/merge_requests/717