SourceForge.net wrote:
Bugs item #1315712, was opened at 2005-10-07 10:03 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1315712&group_id=7586
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: type_traits Group: None Status: Open Resolution: None Priority: 5 Submitted By: Edward Grace (ejgrace) Assigned to: John Maddock (johnmaddock) Summary: Adding boost::is_complex to type_traits.hpp
Initial Comment: Following a discussion on boost-users I am adding this to the bug system so it doesn't get lost.
Can someone add a boost::is_complex<T> trait so that checks for complex numbers can be made. This is a common requirement in templated scientific code as complex numbers sometimes need to be treated differently.
Attached is my implementation, please feel free to incorperate it.
Uh, where is it? There are a number of useful things to go with complex. Here is another. It is common to need the scalar type that corresponds to a numeric type, whether that type is complex or scalar. For example, the type returned by abs. Implementation is pretty trivial: #include <complex> template<typename T> struct Scalar { typedef T type; }; template<typename T> struct Scalar<std::complex<T> > { typedef T type; };