MIRに変換される時点で左辺は let tmp0 = &mut self.0; let tmp1 = tmp0.deref_mut(); let tmp2 = tmp1.deref(); let tmp3 = tmp2.len(); let tmp4 = tmp3 - 1; tmp1.index_mut(tmp4) みたいな中間表現になっているとして(勘)tmp1の時点でtmp0は使われてしまいtwo phase borrowの恩恵を受けられない
9:20 AM - 3 Apr 2020
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