unneeded-cast

Finds unneeded qobject_cast, static_cast and dynamic_casts. Warns when you're casting to base or casting to the same type, which doesn't require any explicit cast.

Also warns when you're using dynamic_cast for QObjects. qobject_cast is prefered.

Example

Foo *a = ...;
Foo *b = qobject_cast<Foo*>(a);

To shut the warnings about using qobject_cast over dynamic cast you can set: export CLAZY_EXTRA_OPTIONS="unneeded-cast-prefer-dynamic-cast-over-qobject"

NOTE: This check has many false-positives. For example, you might cast to base class to call a non-virtual method, or qobject_cast to itself to check if the QObject destructor is currently being run.