Struct LayeredValue 

pub struct LayeredValue<T> {
    pub city: Option<T>,
    pub building: Option<T>,
    pub resident: Option<T>,
}

One value across the City -> Building -> Resident override ladder. Lower layers win; absence falls through upward.

Fields

city: Option<T>

building: Option<T>

resident: Option<T>

Implementations

impl<T> LayeredValue<T>

pub fn resolve(&self) -> Option<&T>

Trait Implementations

impl<T: Clone> Clone for LayeredValue<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for LayeredValue<T>

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

Formats the value using the given formatter.

impl<T> Default for LayeredValue<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: Eq> Eq for LayeredValue<T>

impl<T: PartialEq> PartialEq for LayeredValue<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: PartialEq> StructuralPartialEq for LayeredValue<T>