Struct FieldId 

pub struct FieldId { /* private fields */ }

🔬This is a nightly-only experimental API. (type_info #146922)

Field representing type ID. Representing a field of a struct, tuple or enum variant.

Implementations

impl FieldId

pub const fn type_id(self) -> TypeId

🔬This is a nightly-only experimental API. (type_info #146922)

Returns the TypeId of the actual field type.

#![feature(type_info)]
use std::any::TypeId;

struct Point {
    x: u32,
    y: u32,
}
assert_eq!(
    const { TypeId::of::<Point>().field(0, 0).type_id() },
    TypeId::of::<u32>()
);

pub const fn name(self) -> &'static str

🔬This is a nightly-only experimental API. (type_info #146922)

Returns the name of the field.

#![feature(type_info)]
use std::any::TypeId;

struct Point {
    x: u32,
    y: u32,
}
assert_eq!(
    const { TypeId::of::<Point>().field(0, 0).name() },
    "x",
);

pub const fn offset(self) -> usize

🔬This is a nightly-only experimental API. (type_info #146922)

Returns the offset of the field wrt to its containing type.

#![feature(type_info)]
use std::any::TypeId;

#[repr(C)]
struct Point {
    x: u32,
    y: u32,
}
assert_eq!(
    const { TypeId::of::<Point>().field(0, 1).offset() },
    4,
);

Trait Implementations

impl Clone for FieldId

fn clone(&self) -> FieldId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FieldId

impl Debug for FieldId

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

Formats the value using the given formatter.

impl Eq for FieldId

impl Hash for FieldId

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

where __H: Hasher,

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 Ord for FieldId

fn cmp(&self, other: &FieldId) -> 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.

impl PartialEq for FieldId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for FieldId

fn partial_cmp(&self, other: &FieldId) -> 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 StructuralPartialEq for FieldId