Struct IdAllocator 

pub struct IdAllocator { /* private fields */ }

A simple monotonic ID allocator for InteractionId.

This is intentionally tiny and deterministic. It is designed for applications that want “stable enough” IDs within a running process without introducing a full retained-mode UI tree.

Typical usage:

• store one allocator in app state
• allocate IDs for interactive widgets at creation time
• reuse those IDs across frames when registering areas into InteractionCache

Notes:

• IDs start at 1 by default (leaving 0 as a convenient “none”/sentinel if you want it).
• Allocation is monotonic and does not reuse IDs.
• If you need stable IDs across restarts, use your own hashing/registry instead.

Implementations

impl IdAllocator

pub const fn new() -> Self

Create a new allocator starting at 1.

pub const fn with_start(start: InteractionId) -> Self

Create a new allocator starting at a custom value.

This can be useful if you want to reserve ranges (e.g. 1..1000 for built-ins, etc.).

pub fn alloc(&mut self) -> InteractionId

Allocate the next unique InteractionId.

Panics on overflow (extremely unlikely in practice for TUIs).

pub fn peek(&self) -> InteractionId

Returns the next ID that would be allocated (without allocating it).

pub fn reset(&mut self, start: InteractionId)

Reset the allocator to a specific starting value.

This does not guarantee uniqueness relative to IDs previously allocated. It is intended for tests or tightly controlled scenarios.

Trait Implementations

impl Clone for IdAllocator

fn clone(&self) -> IdAllocator

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IdAllocator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for IdAllocator

fn default() -> Self

Returns the “default value” for a type.