[Boost.Units] Trouble with I/O and specific scaled units
I have the following declarations (reduced from a much larger problem): typedef make_system<si::second_base_unit>::type system; typedef unit<time_dimension, system> second; BOOST_UNITS_STATIC_CONSTANT(seconds, second); typedef make_scaled_unit<second, scale<60, static_rational<1> > >::type minute; BOOST_UNITS_STATIC_CONSTANT(minutes, minute); Unfortunately, if I try this: quantity<minute, double> t = 33.3 * minutes; std::cout << t << std::endl; I get, ultimately, a pair of compile errors: io.hpp:392: error: ‘name’ is not a member of ‘boost::units::scale_list_dim<boost::units::scale<60l, boost::units::static_rational<1l, 1l> > >’ io.hpp:326: error: ‘symbol’ is not a member of ‘boost::units::scale_list_dim<boost::units::scale<60l, boost::units::static_rational<1l, 1l> > >’ I tried adding std::string name_string(const minute&) { return "min"; } std::string symbol_string(const minute&) { return "min"; } but that didn't change anything. Interestingly, if I change the scale from 60 to 10, it compiles and runs fine. What am I missing? Thanks! ~MJI ------------------ Michael J. Iatauro Software Engineer Dell | Services, Federal Government NASA Ames Research Center Office: 650-604-0662 Mail stop: 269-2 P.O. Box 1 Moffett Field, CA 94035-0001 www.dell.com/perotsystems
AMDG On 10/20/2011 06:24 PM, Michael J Iatauro wrote:
typedef make_scaled_unit<second, scale<60, static_rational<1> > >::type minute;
<snip>
I tried adding
std::string name_string(const minute&) { return "min"; }
std::string symbol_string(const minute&) { return "min"; }
but that didn't change anything. Interestingly, if I change the scale from 60 to 10, it compiles and runs fine. What am I missing?
Where did you put the overloads? They need to go in namespace boost::units, to be found by ADL. In Christ, Steven Watanabe
On Fri, Oct 21, 2011 at 9:55 AM, Steven Watanabe <watanabesj@gmail.com>wrote:
AMDG
On 10/20/2011 06:24 PM, Michael J Iatauro wrote:
typedef make_scaled_unit<second, scale<60, static_rational<1> > >::type minute;
<snip>
I tried adding
std::string name_string(const minute&) { return "min"; }
std::string symbol_string(const minute&) { return "min"; }
but that didn't change anything. Interestingly, if I change the scale from 60 to 10, it compiles and runs fine. What am I missing?
Where did you put the overloads? They need to go in namespace boost::units, to be found by ADL.
Ah! Actually, I bumped into this one not long ago. Instead of boost::units I was building up a namespace along the lines cs:units for our company's name-sake and to avoid too much in the way of namespace collusion. So in that case, I would still need my names and symbols kept in boost::units.
In Christ, Steven Watanabe _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
On 10/21/11 8:55 AM, Steven Watanabe wrote:
AMDG
On 10/20/2011 06:24 PM, Michael J Iatauro wrote:
typedef make_scaled_unit<second, scale<60, static_rational<1> > >::type minute;
<snip>
I tried adding
std::string name_string(const minute&) { return "min"; }
std::string symbol_string(const minute&) { return "min"; }
but that didn't change anything. Interestingly, if I change the scale from 60 to 10, it compiles and runs fine. What am I missing?
Where did you put the overloads? They need to go in namespace boost::units, to be found by ADL.
In Christ, Steven Watanabe
I had a feeling it was something simple like that. Thanks, Steven! That fixes my simple case, but unfortunately, I'm still getting the same compilation error with my actual source. I've cut it down to a (relatively) small case, attached. Interestingly, I tried to eliminate the degree dimension from the system, but that caused the minute typedef to fail to compile with a the_specified_dimension_is_not_representible_in_the_given_system assertion. ~MJI ------------------ Michael J. Iatauro Software Engineer Dell | Services, Federal Government NASA Ames Research Center Office: 650-604-0662 Mail stop: 269-2 P.O. Box 1 Moffett Field, CA 94035-0001 www.dell.com/perotsystems
participants (3)
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Michael J Iatauro -
Michael Powell -
Steven Watanabe