Boost lambda: Invoke method on object?

Assuming, I understand what you're looking for, you can use boost::bind: FindNonUniqueValues(boost::bind(&Dummy::GetId, _1)); Actually, you just need boost::mem_fn or even std::mem_fun, but boost::bind will allow you a bit more generality. In this case, you would define FindNonUniqueValues as something like: template /*? */ FindNonUniqueValues(boost::function getter) { ... } Here, I'm not really sure how your FindNonUniqueValues gets its list of objects (or exactly what it's supposed to return - is an IEnumerable like an iterator?), so you could fill that in.

(edited) – Jesse Beder May 1 '10 at 19:53 Thanks, I tried both boost::bind and std::mem_fun. Both solutions work, but I found that std::mem_fun better fits with what I was looking for. – ckarras May 1 '10 at 20:29.

For future reference, here's the solution I ended with, after following ideas from the accepted answer: template std::vector FindInstancesWithDuplicateValue( vector allValues, mem_fun_ref_t getter) { // ...create a *sorted* list of ObjectT, ordered by ObjectT.getter()... // ...loop through the sorted list to find identical adjacent values... // call the mem_fun_ref_t: ValueT value1 = getter(*iterPrev); ValueT value2 = getter(*iter); if (value1 == value2) // duplicates found // ... } Example use: vector list; list. Push_back(Dummy(1, "1-UniqueValue")); list. Push_back(Dummy(2, "2-DuplicateValue")); list.

Push_back(Dummy(3, "2-DuplicateValue")); list. Push_back(Dummy(4, "3-UniqueValue")); vector dummyWithduplicateNames = FindInstancesWithDuplicateValue (list, mem_fun_ref(&Dummy::GetName)); // returns Dummy(2, "2-DuplicateValue") and Dummy(3, "2-DuplicateValue").

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