Enum Room 

#[non_exhaustive]
pub enum Room {
    Tight,
    Ample,
}

How much room a group has, measured against its own allocation.

Never authored. A renderer computes it from what the group was given and what the group’s own contents ask for, in that renderer’s units: a webview from min-content under a container query, a terminal from cell widths, egui from the galley. Nothing in the description says a number, which is the point – an authored breakpoint rots and this cannot.

Why not Depth-style two members and no more

Two is what the measurement supports. The goingson case that produced this type is a window 913px wide – makeover-geometry’s SizeClass::Expanded – holding a group that has run out of room. A third tier would be a guess about a shape nothing in the tree has yet.

Why it is not SizeClass

Because 913 is exactly the case that proves they are different facts. The window is roomy and the group is not, so a type that answered for both would have to be wrong about one of them. Sharing the name would also invite @media thinking straight back in, which is what put a position: absolute in goingson’s stylesheet in the first place. Container semantics instead: a group narrowed by a sidebar behaves the same as one narrowed by the window, and there is one code path rather than two.

Ordered least room first, Priority’s convention, so a group nesting another takes the minimum of the two and relief still resolves inside-out.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Tight

Not everything the group contains fits, and the group’s Fallback decides what happens.

Ample

Everything fits as described.

Trait Implementations

impl Clone for Room

fn clone(&self) -> Room

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Room

impl Debug for Room

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

Formats the value using the given formatter.

impl Eq for Room

impl Hash for Room

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Room

fn cmp(&self, other: &Room) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Room

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Room

fn partial_cmp(&self, other: &Room) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Room