[Boost-users] [math] iround / llround with rounding error

Subject: [Boost-users] [math] iround / llround with rounding error
From: gast128 (gast128_at_[hidden])
Date: 2010-12-13 06:12:43

Hello all,

we want to use iround / llround without exception handling. This is possible 
with the 'user_error' option and override a 'user_rounding_error' function.

We want to return numeric_limits<int>::max() or numeric_limits<__int64>::max() 
if the rounding overflows over the maximum integer domain. This is then 
problematic since the 'user_rounding_error' has a template argument only for 
its source type (e.g. float / double), but not for its target type (i.e. int / 
__int64).

We can ofc do the check before calling iround / llround, but this check would 
then executed be twice for the normal non overflow case.

Anyone idea?