Lambdas without variable capture are guaranteed to be compatible with
plain C functions, so we can use them as callbacks. That keeps the
code closer together and avoids having to declare helper methods as
part of the public class.
In some cases the static method is the actual code, in which case only
"nothrow()" gets replaced with "noexcept" because it's cleaner and to
mark that the code was looked at and intentionally left as-is.
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
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