Struct NodeDesc 

pub struct NodeDesc {
    pub id: String,
    pub size: Size,
    pub kind: Option<String>,
    pub label: Option<String>,
}

One node: a stable string id plus its card size in terminal cells.

kind and label are caller metadata carried through untouched — layout never reads them (renderers and 0450’s mermaid mapping do).

Author-written, shape-stable struct: plain fields + Default, the FRU idiom (NodeDesc { id, size, ..Default::default() }) per ADR-0003 §2, or the fluent constructors below.

Fields

id: String

Unique node id. Duplicate ids are a caller mistake: the first occurrence wins and the drop is recorded in the layout’s fallback label (never silent).

size: Size

Card size in cells. Non-positive extents are clamped to 1x1 at layout time so degenerate inputs still produce a usable picture.

kind: Option<String>

Optional caller metadata (e.g. a semantic class for theming).

label: Option<String>

Optional display label; layout carries it through untouched.

Implementations

impl NodeDesc

pub fn new(id: impl Into<String>, w: i32, h: i32) -> Self

A node with the two required facts: id and card size in cells.

pub fn kind(self, kind: impl Into<String>) -> Self

Attach a semantic kind (builder style).

pub fn label(self, label: impl Into<String>) -> Self

Attach a display label (builder style).

Trait Implementations

impl Clone for NodeDesc

fn clone(&self) -> NodeDesc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NodeDesc

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

Formats the value using the given formatter.

impl Default for NodeDesc

fn default() -> NodeDesc

Returns the “default value” for a type.

impl Eq for NodeDesc

impl PartialEq for NodeDesc

fn eq(&self, other: &NodeDesc) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for NodeDesc