Bindings & mutability

Runtime bindings

let Name: str = "Player";
let Count = 4;
var Health: f32 = 100.0;
var Index = 0;

let creates a read-only binding. var creates writable storage. Both require an initializer, and a runtime type annotation can be inferred from it.

Compile-time constants

const MaxPlayers: usize = 64;

const declares a compile-time value and requires an explicit type. It does not mean runtime read-only access.

Binding and access are different

var Pointer: i32* = GetPointer();
let WritablePointer: mut i32* = GetWritablePointer();

These are illustrative fragments requiring the named functions. The first binding can be reassigned while its pointee is read-only. The second fixes the pointer value but permits mutation through it. readonly is shallow and does not freeze other aliases.

Parameters

Parameters are binding-readonly by default. mut Name: T grants writable owned parameter storage. Type-position mut, as in mut T&, grants writable access through a reference.