Struct Attributes 

pub struct Attributes { /* private fields */ }

An ordered, immutable collection of Attributes.

Lookups return the first matching attribute; Attributes::and prepends the argument’s attributes so the more specific bag wins. Construction never starts any work.

Implementations

impl Attributes

pub fn none() -> Self

An empty attribute set (the Default).

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

A set holding a single Attribute::Name.

pub fn input_buffer(initial: usize, max: usize) -> Self

A set holding a single Attribute::InputBuffer hint.

pub fn try_input_buffer(initial: usize, max: usize) -> AttributeResult<Self>

Fallible constructor for a single Attribute::InputBuffer hint.

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

A set holding a single Attribute::Dispatcher hint.

pub fn batch_size(size: usize) -> Self

A set holding a single Attribute::BatchSize hint.

A1 records this in execution reports; batch execution semantics are added by later M14 rungs.

pub fn try_batch_size(size: usize) -> AttributeResult<Self>

Fallible constructor for a single Attribute::BatchSize hint.

pub fn parallelism(parallelism: usize) -> Self

A set holding a single Attribute::Parallelism hint.

A1 records this in execution reports; per-node parallel execution semantics are added by later M14 rungs.

pub fn try_parallelism(parallelism: usize) -> AttributeResult<Self>

Fallible constructor for a single Attribute::Parallelism hint.

pub fn fusion(fusion: Fusion) -> Self

A set holding a single Attribute::Fusion preference.

pub fn metrics_level(level: MetricsLevel) -> Self

A set holding a single Attribute::MetricsLevel preference.

pub fn kernel_backend(backend: KernelBackend) -> Self

A set holding a single Attribute::KernelBackend preference.

pub fn and(self, other: Self) -> Self

Combine two sets; the attributes of other take precedence on accessor lookups.

pub fn attribute_list(&self) -> &[Attribute]

The underlying attributes, in lookup order (most specific first).

pub fn validate(&self) -> AttributeResult<()>

Validate every attribute in this bag.

pub fn name(&self) -> Option<&str>

The first Attribute::Name, if any.

pub fn input_buffer_hint(&self) -> Option<(usize, usize)>

The first Attribute::InputBuffer hint as (initial, max), if any.

pub fn dispatcher_hint(&self) -> Option<&str>

The first Attribute::Dispatcher hint, if any.

pub fn batch_size_hint(&self) -> Option<usize>

The first Attribute::BatchSize hint, if any.

pub fn parallelism_hint(&self) -> Option<usize>

The first Attribute::Parallelism hint, if any.

pub fn fusion_hint(&self) -> Option<Fusion>

The first Attribute::Fusion preference, if any.

pub fn metrics_level_hint(&self) -> Option<MetricsLevel>

The first Attribute::MetricsLevel preference, if any.

pub fn kernel_backend_hint(&self) -> Option<KernelBackend>

The first Attribute::KernelBackend preference, if any.

pub fn with_name(self, name: impl Into<String>) -> Self

Return a copy with a Attribute::Name prepended so it wins Attributes::name.

Trait Implementations

impl Clone for Attributes

fn clone(&self) -> Attributes

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Attributes

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

Formats the value using the given formatter.

impl Default for Attributes

fn default() -> Attributes

Returns the “default value” for a type.

impl Eq for Attributes

impl PartialEq for Attributes

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Attributes