The one big difference tho is that in Rust, the end user of the library - i.e. the person compiling the binary of which this library is a part - can decide at that point whether panics unwind like C++ exceptions, or just abort immediately. Conversely, this means that the library should never assume that it can catch panics, even its own internal ones, because it may be compiled with panic=abort.
So it's kinda like C++ exceptions, but libraries can only throw, never catch.
The one big difference tho is that in Rust, the end user of the library - i.e. the person compiling the binary of which this library is a part - can decide at that point whether panics unwind like C++ exceptions, or just abort immediately. Conversely, this means that the library should never assume that it can catch panics, even its own internal ones, because it may be compiled with panic=abort.
So it's kinda like C++ exceptions, but libraries can only throw, never catch.