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
The single-element ilist::splice() function supports a noop move: List.splice(I, List, I); The corresponding std::list function doesn't allow that, so add a unit test to document that behavior. This also means that List.splice(I, List, F); is somewhat surprisingly not equivalent to List.splice(I, List, F, next(F)); This patch adds an assertion to catch the illegal case I == F above. Alternatively, we could make I == F a legal noop, but that would make ilist differ even more from std::list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170443 91177308-0d34-0410-b5e6-96231b3b80d8