Hi,<br><br>I have a question regarding insert_check and insert_commit on an intrusive set.<br><br>I know that you must call insert_commit after calling insert_check, with no modifications to the set between the two calls.<br>
<br>Is it OK, however, to call insert_check and then never call insert_commit (even though insert_check was successful)?<br><br>Say I have objects contained in multiple sets (using multiple hooks).  I want to insert a new object into each of the sets, but only if I know that the insert will succeed on all of the sets.   I call insert_check on each, and if all succeed I call insert_commit on each.  If any of the insert_check calls fail, I do none of the insert_commits (even though all but one might have worked)<br>
<br>It seems like it should be OK, and the documentation doesn&#39;t say that it won&#39;t work.  I&#39;m only concerned for two related reasons:<br><br>1) insert_check is not declared const.  Does this mean that the set is already partially modified?<br>
<br>2) insert_commit is documented as constant time.  Does this mean that any red-black rebalancing was already done during insert_check?  If so, what happens if I never do the insert_commit?<br><br>Thanks!<br>Paul Rose<br>
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