On Sun, 19 Feb 2006 10:17:12 -0000, John Maddock wrote
How about something along the lines of:
bcp boost/shared_ptr.hpp --exclude=quick_allocator.hpp
Or:
#ifdef BOOST_SP_USE_QUICK_ALLOCATOR
//@bcp optional "quick_allocator is only used if explicitly requested" #include
#endif
which would then inform the user that an optional dependency wasn't being followed (if this is the default):
bcp: an optional dependency isn't included in the subset because
`quick_allocator is only used if explicitly requested'
bcp: use `bcp boost/shared_ptr.hpp boost/detail/quick_allocator.hpp' to include it
The advantage is that we don't have to decide whether to follow a particular dependency, the choice can be left to the person running bcp.
I like it, shouldn't be too hard to add either.....
As you've already shown... Is 'optional' a 'fixed tag' or can we use it to slice and dice things? For example, suppose we wanted to create a boost-wide 'with[out]_serialization' capability. Could we do this? //@bcp with_serialization "serialization support for date-time is optional" #include #include "boost/serialization/split_free.hpp" There a bunch of boost libraries that would benefit from this type of optional flagging. For date-time it turns out that the --exclude=xyz.hpp capability could also serve the same purpose. Another possible idea. What if we created a new convention: <libname>_bcp.cfg that could be put in the library header directory. Then the library author could directly express the options using some trivial syntax of our own invention that would feed bcp and thus trivialize the command line for users. This syntax would be something like: option option_name option_description bcp_command_parameters option serialization "Provides support for serialization" --exclude date_time/gregorian/greg_serialize.hpp --exclude date_time/posix_time/time_serialize.hpp or even better: option serialization "Provides support for serialization" --exclude_library_depend serialization --exclude_library_depend archive Anyway, just some wild ideas ;-) Jeff