added missing const in insert()
update
update for unordered containers
update
update
Update for unordered containers
Update for unordered containers
Update for unordered containers
minor fixes
update to support circular_buffer
update to support circular_buffer
fixed minor problems reported in Trac
fix of minor problems reported in trac
update for better RVO
update of test for ptr_unordered_set
doc update
doc update
doc update
doc update
doc update