Struct FieldKey 

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

Opaque catalog key for a context field of marker type T.

Keys are copyable handles to immutable schemas. They can be obtained only from fields, preventing callers from inventing names or changing field visibility.

use std::marker::PhantomData;

use rocketmq_error::{fields, FieldKey, TextField};

let _: FieldKey<TextField> = FieldKey {
    schema: fields::TOPIC.schema(),
    marker: PhantomData,
};

use rocketmq_error::{fields, FieldKey, TextField};

let _: FieldKey<TextField> = FieldKey::new(fields::TOPIC.schema());

Implementations

impl<T> FieldKey<T>

pub const fn schema(self) -> FieldSchema

Returns the immutable schema carried by this key.

Trait Implementations

impl<T> Clone for FieldKey<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> Copy for FieldKey<T>

impl<T> Debug for FieldKey<T>

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

Formats the value using the given formatter.

impl<T: Eq> Eq for FieldKey<T>

impl<T: Hash> Hash for FieldKey<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Ord> Ord for FieldKey<T>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl<T: PartialEq> PartialEq for FieldKey<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: PartialOrd> PartialOrd for FieldKey<T>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

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