auto: Remove interior mutability on vectors, round 2 #4908
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This patch finishes removing inner vector mutability from the vast majority of the compiler. Exceptions:
~[]
, but Niko asked me to hold off on removing Dvecs until he makes some fixes to borrowed pointers.I also took this chance to remove many of the inner-mutability-related functions from core::vec, or as many uses of those functions as possible where still necessary. consume_mut and append_mut have been axed. cast_to_mut and cast_from_mut are still needed in a few places.