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FScript

Destructuring

Patterns are used in bindings, parameters, and match arms.

Record destructuring

{ name, active } = user

You can also match nested structure:

{ tag: 'member', name } = value

Array destructuring

[first, second] = items

Why patterns matter

Patterns make FScript’s expression-oriented style more concise:

  • bindings can unpack the shape you need immediately
  • match arms can describe both branching and extraction
  • tagged unions become especially readable

Comparison to JavaScript

The syntax is familiar if you know JS destructuring, but in FScript patterns are also a central part of matching and type narrowing rather than just a convenience for assignment.