Function objc2::exception::catch [−][src]
Expand description
Tries to execute the given closure and catches an Objective-C exception if one is thrown.
Returns a Result
that is either Ok
if the closure succeeded without an
exception being thrown, or an Err
with a pointer to an exception if one
was thrown. The exception is retained and so must be released.
Safety
The given closure must not panic (e.g. normal Rust unwinding into this causes undefined behaviour).
Additionally, this unwinds through the closure from Objective-C, which is
undefined behaviour until C-unwind
is stabilized, see RFC-2945.