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| author | Frederik Gladhorn <frederik.gladhorn@digia.com> | 2013-10-24 12:48:39 +0200 |
|---|---|---|
| committer | Frederik Gladhorn <frederik.gladhorn@digia.com> | 2013-10-24 12:48:42 +0200 |
| commit | 840f6a40e6218992b5b9d451ee3c0886a4846c89 (patch) | |
| tree | 2b808decc7adf5218b810d2de6b45c5a8b4cfc42 /src/corelib/doc/src/containers.qdoc | |
| parent | 109bf980b37fed405c6c1eb14cb9c83ff897e389 (diff) | |
| parent | 2e3870fe37d36ccf4bd84eb90e1d5e08ad00c1bc (diff) | |
Merge remote-tracking branch 'origin/stable' into dev
Change-Id: Ie56539b2e0be611a363b5f15ae5412a78d6945a2
Diffstat (limited to 'src/corelib/doc/src/containers.qdoc')
| -rw-r--r-- | src/corelib/doc/src/containers.qdoc | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/corelib/doc/src/containers.qdoc b/src/corelib/doc/src/containers.qdoc index ff2df9c020..fa26409d83 100644 --- a/src/corelib/doc/src/containers.qdoc +++ b/src/corelib/doc/src/containers.qdoc @@ -533,10 +533,18 @@ This problem doesn't occur with functions that return a const or non-const reference to a container. + \section3 Implicit sharing iterator problem + \l{Implicit sharing} has another consequence on STL-style - iterators: You must not take a copy of a container while - non-const iterators are active on that container. Java-style - iterators don't suffer from that limitation. + iterators: you should avoid copying a container while + iterators are active on that container. The iterators + point to an internal structure, and if you copy a container + you should be very careful with your iterators. E.g: + + \snippet code/doc_src_containers.cpp 24 + + The above example only shows a problem with QVector, but + the problem exists for all the implicitly shared Qt containers. \keyword foreach \section1 The foreach Keyword |