13.9. Key Point Summary
The exception handling mechanism helps with the portability and design of C++ class libraries.
The exception mechanism consists of try blocks, catch handlers, throw expressions, and exception specifications.
A try block is an area of your program that detects exceptions.
Catch handlers have signatures denoting an exception type and immediately follow try blocks or another catch handler with a different signature.
Throw expressions raise exceptions inside try blocks for catch handlers to capture.
Rethrows are useful when catch handlers need to perform preliminary processing before they pass the current exception up the call chain to a different catch handler.
The compiler searches each catch handler for a signature that matches ...
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