AMDG Zachary Turner wrote:
Thanks for your response. I got this working mostly, but I'm still having difficulty seeing how to tie it all together. I added the following:
typedef boost::units::make_system<bit_base_unit>::type data_system; typedef boost::units::unit<data_base_dimension::dimension_type, data_system> capacity;
But I'm still not sure how to create and manipulate values with these units. For example, I can do:
quantity<capacity> compressed_size;
but if I try to assign it to anything I get errors. I tried using the BOOST_UNITS_STATIC_CONSTANT macro to create aliases such as bytes, megabytes, etc but I think this is the wrong approach, is it because all the units above are defined as base units?
Ideally I want to be able to type:
quantity<capacity> compressed_size = 10000 * bytes;
That won't quite work. Implicit conversions are banned. typedef byte_base_unit::unit_type bytes; quantity<capacity> compressed_size(10000 * bytes()); You can also use BOOST_UNITS_STATIC_CONSTANT(bytes, byte_base_unit::unit_type); to allow 10000 * bytes;
quantity<capacity> total_size = 400000 * bytes;
float ratio = compressed_size / total_size; //should be dimensionless
This ought to work.
quantity<time> duration = 300 * seconds;
quantity<data_rate> = total_size / duration; //has dimensions capacity/tim
This should work if data_rate is defined correctly. In Christ, Steven Watanabe