Struct Labels 

pub struct Labels {
    pub cells: IndexMap<CellId, CellMeta>,
}

Associates human-readable labels and type-erased closures with stable sheet IDs.

Fields

cells: IndexMap<CellId, CellMeta>

Cells in insertion order (preserves display ordering).

Implementations

impl Labels

pub fn new() -> Self

Creates an empty label set.

pub fn add_cell<T>(&mut self, id: CellId, label: &str)

where T: Any + Display + FromStr + 'static, T::Err: Display,

Registers display metadata for a cell of type T.

• Precondition: id is a live cell in the sheet this Labels will be used with.
• Precondition: T matches the type registered with Sheet::add_cell for id.

pub fn add_compound_cell(&mut self, sheet: &Sheet, id: CellId, label: &str)

Registers display-only metadata for a canonical compound cell of any shape.

write_str always returns Err — no compound editor exists yet (tracked as a follow-up: see the “Support editing tuple-typed cells in begin” GitHub issue). The field still participates fully in crate::SheetInspector’s existing invalid/warning/disabled machinery, since that’s entirely keyed on CellId, not on any per-type behavior.

Missing storage or formatting capability displays ?; unsupported writes always return an explicit error without mutating the sheet.

• Complexity: Preparation O(1); display O(n + v + s) for n type nodes, v values and s output bytes, excluding leaf formatter costs.

Examples

let sheet = adam_lang::AdamParser::new(adam_lang::TypeRegistry::new(), cel_parser::OpLookup::new())
    .parse_str("sheet s { cell xs: [i32]; }").unwrap();
let id = sheet.cell_names["xs"].0;
let mut labels = adam_web_ui::Labels::new();
labels.add_compound_cell(&sheet, id, "xs");
assert_eq!((labels.cells[&id].display)(&sheet), "[]");

Trait Implementations

impl Default for Labels

fn default() -> Self

Returns Labels::new().