Core · Module 8 · Lesson 2 of 5

Standard Exceptions and Custom Exception Types

Pick the right standard exception, derive focused custom types with noexcept what, and order catch clauses from most to least specific.

ProAbout 9 minutes

By the end you can

Select standard exceptions for invalid arguments and range failures
Derive custom exceptions with correct noexcept overrides
Order catch handlers to preserve derived-type information

Builds on Throwing and Catching: try, catch and throw.

01 · A question first

A file loader throws a plain string for a missing member, an int for a bad age, and a custom type for a corrupt record. Each call site guesses what to catch, and one guess misses. How do you build a small family of error types so every failure is caught once, by name, with its message intact?

Make a guess before you read on.

02 · The idea

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What's inside

Why thrown values need families
How the standard hierarchy organizes failures
Why derivation and order preserve meaning
What it costs and what to avoid
How to test the order of handlers
Where it is used