Struct Attr 

pub struct Attr { /* private fields */ }

One attribute selection with optional :as, :limit, and :default options. Forward by default; Attr::reverse flips it to a reverse ref.

Implementations

impl Attr

pub fn new(name: impl Into<String>) -> Self

A forward attribute selection for "ns/name".

pub fn reverse(self) -> Self

Marks this as a reverse ref (:ns/_name).

pub fn as_key(self, key: impl IntoEdn) -> Self

Renames the result key (:as). Accepts a keyword or any scalar.

pub fn limit(self, n: usize) -> Self

Bounds a cardinality-many result to n values (:limit n).

pub fn unlimited(self) -> Self

Removes the result bound (:limit nil).

pub fn default(self, value: impl IntoEdn) -> Self

Supplies a value when the attribute is absent (:default).

Trait Implementations

impl Clone for Attr

fn clone(&self) -> Attr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Attr

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

Formats the value using the given formatter.

impl Eq for Attr

impl From<&str> for Attr

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<String> for Attr

fn from(value: String) -> Self

Converts to this type from the input type.

impl PartialEq for Attr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Attr