warning: dynamic exception specifications are deprecated in C++11

blowekamp · December 4, 2017, 3:12pm

The name for the macro ITK_NOEXCEPT_OR_THROW must not change. Supporting multiple legacy names is going to be significantly more confusing than the current name you don’t get (yet).

You can see where the naming came from by looking at the code:

github.com

InsightSoftwareConsortium/ITK/blob/master/Modules/Core/Common/include/itkMacro.h#L234-L238


// Should use ITK_NOEXCEPT defined in: itk_compiler_detection.h.
// Following comments apply to ITK_NOEXCEPT as well.
// Use only for low-level functions. Swap, UnRegister, etc, involved in move semantics.
// Avoid using it elsewhere.
// Unnecesary in destructors when c++11 becomes a requirement.

This macro produces the proper function specification for C++03, and C++11. I’d blame C++03 for the convention of having to use “throw()” to specify no exception.

ITK_NOEXCEPT does not provide a C++03 implementation:

github.com

InsightSoftwareConsortium/ITK/blob/master/Modules/Core/Common/include/itk_compiler_detection.h#L266-L272


#  if ITK_COMPILER_CXX_NOEXCEPT
#    define ITK_NOEXCEPT noexcept
#  else
#    define ITK_NOEXCEPT throw()
#  endif

ITK_NOEXCEPT follows CMake’s compiler detection module, while ITK_NOEXCEPT_OR_THROW was defined for ITK’s compatibility needs.