Essential

Essential information before you begin the tutorial.

Gentle introduction to writing code with simple success-or-failure return types.

1. Inspecting result
2. TRY operations

Success-or-failure return types where failure can take two forms, expected/handled failure and unexpected/abort failure.

1. Inspecting outcome

Describes the concept of NoValuePolicy and how to use no-value policies.

1. A custom no-value policy
2. Built-in policies

Why you should avoid custom E types in public APIs.