Struct Responsive 

pub struct Responsive<T> { /* private fields */ }

A breakpoint-aware value with inheritance from smaller tiers.

Each slot is Option<T>. Slot 0 (Xs) is always Some (enforced by the constructor). Resolution walks downward from the requested breakpoint until a Some slot is found.

Implementations

impl<T: Clone> Responsive<T>

pub fn new(base: T) -> Self

Create a responsive value with a base value for Xs.

All larger breakpoints inherit this value until explicitly overridden.

pub fn at(self, bp: Breakpoint, value: T) -> Self

Set the value for a specific breakpoint (builder pattern).

pub fn set(&mut self, bp: Breakpoint, value: T)

Set the value for a specific breakpoint (mutating).

pub fn clear(&mut self, bp: Breakpoint)

Clear the override for a specific breakpoint, reverting to inheritance.

Clearing Xs is a no-op (it always has a value).

pub fn resolve(&self, bp: Breakpoint) -> &T

Resolve the value for a given breakpoint.

Walks downward from bp to Xs until an explicit value is found. Always succeeds because Xs is always set.

pub fn resolve_cloned(&self, bp: Breakpoint) -> T

Resolve and clone the value for a given breakpoint.

pub fn has_explicit(&self, bp: Breakpoint) -> bool

Whether a specific breakpoint has an explicit (non-inherited) value.

pub fn explicit_values(&self) -> impl Iterator<Item = (Breakpoint, &T)>

Get all explicitly set breakpoints and their values.

pub fn map<U: Clone>(&self, f: impl Fn(&T) -> U) -> Responsive<U>

Map the values to a new type.

Trait Implementations

impl<T: Clone> Clone for Responsive<T>

fn clone(&self) -> Responsive<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Responsive<T>

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

Formats the value using the given formatter.

impl<T: Clone + Default> Default for Responsive<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: Clone + Display> Display for Responsive<T>

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

Formats the value using the given formatter.

impl<T: PartialEq> PartialEq for Responsive<T>

fn eq(&self, other: &Responsive<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Eq> Eq for Responsive<T>

impl<T> StructuralPartialEq for Responsive<T>