Enum Bound 

pub enum Bound {
    Px(f32),
    Fit,
    Calc(Calc),
}

What a minWidth / maxWidth / minHeight / maxHeight declares: px, the node’s own fit size (a min only), or a size expression that layout resolves against the parent’s content box when it sizes the node (backlog F109). Until then a calc bound clamps like none, as a percentage clamp does in CSS’s intrinsic sizing.

A calc clamp costs the spec nothing: it rides in the clamp’s own f32 as a negative, the way Min::FIT does — min_w below −1 (Min::calc), max_w below 0 (max_calc) — and layout writes the resolved px over it, so a reader after layout reads a number and one before it goes through LayoutSpec::max_w_px.

Variants

Px(f32)

Fit

Calc(Calc)

Trait Implementations

impl Clone for Bound

fn clone(&self) -> Bound

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Bound

impl Debug for Bound

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

Formats the value using the given formatter.

impl From<Min> for Bound

fn from(m: Min) -> Bound

Converts to this type from the input type.

impl From<f32> for Bound

fn from(px: f32) -> Bound

Converts to this type from the input type.

impl PartialEq for Bound

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Bound