Enum CursorShape 

pub enum CursorShape {
    Block,
    Underline,
    Bar,
}

The cursor’s drawn shape (DECSCUSR / the renderer’s caret glyph). The engine reports it on the frame; the renderer draws it. Default Block (#81).

Deliberately exhaustive (#843) — and the reason is the wire, not the spec.

An earlier draft of that sweep said “DECSCUSR’s shape space, closed”. That is false, and the counter-example is in this repository: justerm-renderer has carried a fourth shape, HollowBlock, since before the sweep (justerm-renderer/src/cursor.rs:60, wire id 3), and no core frame can ask for it. The space is not closed by the spec; it has already been grown once, one crate over.

What actually decides it is that this enum is mapped onto wire values by a match outside this crate — justerm-wasm-decode/src/lib.rs:198 turns each member into an int for the frame header. Marking it non-exhaustive would force a _ arm there, converting a future compile error into a silently wrong wire value. That is the same construct that reddened cargo test --workspace for crate::MarkerKind, where the rule is stated in full.

Variants

Block

Underline

Bar

Trait Implementations

impl Clone for CursorShape

fn clone(&self) -> CursorShape

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CursorShape

impl Debug for CursorShape

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

Formats the value using the given formatter.

impl Default for CursorShape

fn default() -> CursorShape

Returns the “default value” for a type.

impl Eq for CursorShape

impl PartialEq for CursorShape

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CursorShape