cc6ceca789
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51187 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
21 lines
979 B
TeX
21 lines
979 B
TeX
\section{\class{wxWeakRefDynamic<T>}}\label{wxweakrefdynamic}
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wxWeakRefDynamic<T> is a template class for weak references that is used in
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the same way as wxWeakRef<T>. The only difference is that wxWeakRefDynamic
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defaults to using \texttt{dynamic\_cast<>} for establishing the object
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reference (while wxWeakRef defaults to \texttt{static\_cast<>}).
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So, wxWeakRef will detect a type mismatch during compile time and will
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have a little better run-time performance. The role of wxWeakRefDynamic
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is to handle objects which derived type one does not know.
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\textbf{Note:} wxWeakRef<T> selects an implementation based on the static type
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of T. If T does not have wxTrackable statically, it defaults to to a mixed-
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mode operation, where it uses \texttt{dynamic\_cast<>} as the last measure (if
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available from the compiler and enabled when building wxWidgets).
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For general cases, wxWeakRef<T> is the better choice.
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For API documentation, see: \helpref{wxWeakRef}{wxweakref}
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