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Coding style: Add a comment on Aggregation vs Inheritance

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Change-Id: Ied68af7f63e34a05a087b80be0f219f9ccd4e8eb
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
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hjk
2014-02-13 14:28:55 +01:00
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doc/api/coding-style.qdoc
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@@ -893,6 +893,16 @@
Suddenly, QList symbols are exported from two libraries which results in a Suddenly, QList symbols are exported from two libraries which results in a
clash. clash.
\section2 Inheritance Versus Aggregation
\list
\li Use inheritance if there is a clear \e{is-a} relation.
\li Use aggregation for re-use of orthogonal building blocks.
\li Prefer aggregation over inheritance if there is a choice.
\endlist
\section2 Conventions for Public Header Files \section2 Conventions for Public Header Files
Our public header files have to survive the strict settings of Our public header files have to survive the strict settings of