Module exception 

@throw and @try/@catch exceptions.

By default, if a message send (such as those generated with the msg_send! and extern_methods! macros) causes an exception to be thrown, objc2 will simply let it unwind into Rust.

While not UB, it will likely end up aborting the process, since Rust cannot catch foreign exceptions like Objective-C’s. However, objc2 has the "catch-all" Cargo feature, which, when enabled, wraps each message send in a @catch and instead panics if an exception is caught, which might lead to slightly better error messages.

Most of the functionality in this module is only available when the "exception" feature is enabled.

See the following links for more information:

• Exception Programming Topics for Cocoa
• The Objective-C Programming Language - Exception Handling
• Exception Handling in LLVM

Structs

Exception

An Objective-C exception.

Functions

catchexception

Tries to execute the given closure and catches an Objective-C exception if one is thrown.

throwexception

Throws an Objective-C exception.