`static_cast<time_type>` in `integrate_times`

[mjziebarth]

Hi,

it seems to me that there are a number of static_cast<time_type> in the integrate_times implementation, e.g.

odeint/include/boost/numeric/odeint/integrate/detail/integrate_times.hpp

Line 64 in 8b4768e

while( less_with_sign( current_time , static_cast<time_type>(*start_time) , current_dt ) )

odeint/include/boost/numeric/odeint/integrate/detail/integrate_times.hpp

Line 97 in 8b4768e

while( less_with_sign( current_time , static_cast<time_type>(*start_time) , dt ) )

odeint/include/boost/numeric/odeint/integrate/detail/integrate_times.hpp

Line 139 in 8b4768e

Time last_time_point = static_cast<time_type>(*last_time_iterator);

(and potentially more; L139 is where I encountered a compiler error) that don't fit the the target variables' types. Say, for instance, Time in these cases is a Boost Units quantity, then time_type, if I understand correctly, is a plain double (or other floating point format). If I further understand the TimeIterator type correctly, that type should return a Time instance on valid dereference.

Now the static_cast tries to cast a quantity to, say, double (which fails), which is then reassigned to a quantity (which should
also fail).

It seems to me that simply removing the static casts might fix the issue, although I have not spent much time looking into it.
For now I'll use another integrator but I'd be happy to help to solve this issue in the future - if my hypothesis is correct.

Best
Malte