pub type SecTransformAttributeActionBlock = *mut DynBlock<dyn Fn(NonNull<SecTransformAttribute>, NonNull<CFType>) -> *const CFType>;👎Deprecated: SecTransform is no longer supported
Available on crate features
SecCustomTransform and block2 only.Expand description
A block used to override the default attribute handling for when an attribute is set.
Parameter attribute: The attribute whose default is being overridden or NULL
if this is a generic notification override
Parameter value: Proposed new value for the attribute.
Returns: The new value of the attribute if successful. If an error occurred then a CFErrorRef is returned. If a transform needs to have a CFErrorRef as the value of an attribute, then the CFErrorRef needs to be placed into a container such as a CFArrayRef, CFDictionaryRef etc.
See the example program in this header for more details.
See also Apple’s documentation