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rollup merge of #17992 : jkleint/guide-double-borrow

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Alex Crichton 2014-10-13 15:10:08 -07:00
parent 030c79c91a ed7d1be12f
commit f006e86eed
1 changed files with 2 additions and 3 deletions
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@ -3537,9 +3537,8 @@ restriction:
1. If the borrow is immutable, you may read the data the pointer points to.
2. If the borrow is mutable, you may read and write the data the pointer points to.
3. You may lend the pointer to someone else in an immutable fashion, **BUT**
4. When you do so, they must return it to you before you must give your own
borrow back.
3. You may lend the pointer to someone else, **BUT**
4. When you do so, they must return it before you can give your own borrow back.
This last requirement can seem odd, but it also makes sense. If you have to
return something, and you've lent it to someone, they need to give it back to