|Summary:||std::binder2nd deprecated warnings with C++11|
|Product:||Eigen||Reporter:||Johannis Bauer <digitalriptide>|
|Severity:||Compilation Problem||CC:||chtz, gael.guennebaud, jacob.benoit.1, jagerman, redpony, sendsbeak|
|Version:||3.3 (current stable)|
|Bug Depends on:|
|Bug Blocks:||97, 558|
Description Johannis Bauer 2014-09-03 22:27:27 UTC
When compiling with C++11 support on the Intel compilers, lots of verbose warnings are emitted that std::binder2nd is deprecated.
Comment 1 Christoph Hertzberg 2015-04-16 12:57:29 UTC
These also arise when compiling with clang. Eventually, we'll need to replace these by custom functors anyways if we want to use vectorized comparisons (Bug 97)
Comment 2 Christoph Hertzberg 2015-05-04 12:53:46 UTC
Created attachment 572 [details] Replacing binder1st/binder2nd usage by custom functors In the attached patch I replaced all usages of binder1st/binder2nd by custom functors which are then called with Array::Constant(...) as second object. Furthermore, operator< and operator> have the same return type (with swapped arguments now (the same for <=, >=). Probably the names can be chosen differently and some boiler-plate code can be hidden inside macros. The functors also don't provide packet-functionality, yet (Bug 97).
Comment 3 Gael Guennebaud 2015-05-05 16:33:37 UTC
Thank you for the patch, the introduction of an enum ComparisonName seems to be a bit overkill, and perhaps it would have been simpler to keep the std::* functors for now as the real fix here consists in using Constant instead of bind (as this is already the case for min/max and perhaps others) but this is preparing bug 97, so ok.
Comment 4 Christoph Hertzberg 2015-05-07 15:32:05 UTC
Pushed here (after hiding boiler plate code into macros): https://bitbucket.org/eigen/eigen/commits/3b1a6b9870 The whole ComparisonName stuff is indeed not necessary for this, but as mentioned, this prepares resolving Bug 97.
Comment 5 Chris Dyer 2015-05-07 20:03:28 UTC
Just happened to see this push. Unfortunately, it doesn't fix all the deprecation warnings with C++11 and g++-5.1.0: /home/chris/neweig/eigen/Eigen/src/SparseCore/../plugins/MatrixCwiseUnaryOps.h:17:27: warning: ‘template<class _Operation> class std::binder1st’ is deprecated [-Wdeprecated-declarations] typedef CwiseUnaryOp<std::binder1st<std::equal_to<Scalar> >, const Derived> CwiseScalarEqualReturnType;
Comment 6 Christoph Hertzberg 2015-05-07 20:08:45 UTC
Hm, right. Probably this requires unary functors after all.
Comment 7 Gael Guennebaud 2015-06-09 09:06:59 UTC
Fixed: https://bitbucket.org/eigen/eigen/commits/4930262d1c7a/ and manually backported: https://bitbucket.org/eigen/eigen/commits/2e22e990dedf/
Comment 8 Jason Rhinelander 2015-06-29 18:13:02 UTC
I'm still getting these warnings in 3.2.5, but not on the devel branch. The 3.2 branch apparently also needs this change backported: https://bitbucket.org/eigen/eigen/commits/ff283951217/ to avoid: /home/jagerman/research/fracdist/eigen3/Eigen/src/Core/Functors.h:973:28: warning: ‘template<class _Operation> class std::binder2nd’ is deprecated [-Wdeprecated-declarations] struct functor_traits<std::binder2nd<T> > ^
Comment 9 Nobody 2019-12-04 13:41:53 UTC
-- GitLab Migration Automatic Message -- This bug has been migrated to gitlab.com's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.com/libeigen/eigen/issues/872.