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9469fd1dfc
This moves it to the iterator facade utilities giving it full random access semantics, etc. It can also now be used with standard algorithms like std::all_of and std::any_of and range adaptors like llvm::reverse. Also make the semantics of iterating match what every other iterator uses and forbid decrementing past the begin iterator. This was used as a hacky way to work around iterator invalidation. However, every instance trying to do this failed to actually avoid touching invalid iterators despite the clear documentation that the removed and all subsequent iterators become invalid including the end iterator. So I've added a return of the next iterator to removeCase and rewritten the loops that were doing this to correctly follow the iterator pattern of either incremneting or removing and assigning fresh values to the iterator and the end. In one case we were trying to go backwards to make this cleaner but it doesn't actually work. I've made that code match the code we use everywhere else to remove cases as we iterate. This changes the order of cases in one test output and I moved that test to CHECK-DAG so it wouldn't care -- the order isn't semantically meaningful anyways. llvm-svn: 298791 |
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