Hello, I don't understand the behavior of icl::interval_map<,> on the following scenario: 1. Before adding a new segment: {([0.179494,0.679494)->0.333333)([2.51847,3.01847)->0.333333)([3.24221,3.74221)->0.333333)} 2. Add segment: ([3.74221,4.24221)->0.333333) 3. After adding the segment: {([0.179494,0.679494)->0.333333)([2.51847,3.01847)->0.333333)([3.24221,4.24221)->0.333333)} What I would expect at step #3 is: {([0.179494,0.679494)->0.333333)([2.51847,3.01847)->0.333333)([3.24221,4.24221)->0.666667)} For the sake of clarity I provide a sample code below: --- [code] --- #include #include #include <iostream> #include <utility> namespace icl = ::boost::icl; int main() { typedef double time_type; typedef double value_type; typedef icl::interval interval_type; icl::interval_map intervals; intervals += ::std::make_pair(interval_type::right_open(0.1794936069088625, 0.6794936069088625), 0.3333333333333333); intervals += ::std::make_pair(interval_type::right_open(2.518467327901063, 3.018467327901063), 0.3333333333333333); intervals += ::std::make_pair(interval_type::right_open(3.242205294874485, 3.742205294874485), 0.3333333333333333); std::cout << "Intervals:\n" << intervals << std::endl; intervals += ::std::make_pair(interval_type::right_open(3.742205294874485, 4.242205294874486), 0.3333333333333333); std::cout << "Updated Intervals:\n" << intervals << std::endl; } --- [/code] --- What kind of interval container should I use in order to obtain the wanted result? I'm using the SVN trunk version of boost with GCC 4.5.1 (linux x86_64) Thank you very much for helping me! Best, -- Marco