1.0.0[][src]Struct core::any::TypeId

pub struct TypeId { /* fields omitted */ }

A TypeId represents a globally unique identifier for a type.

Each TypeId is an opaque object which does not allow inspection of what's inside but does allow basic operations such as cloning, comparison, printing, and showing.

A TypeId is currently only available for types which ascribe to 'static, but this limitation may be removed in the future.

While TypeId implements Hash, PartialOrd, and Ord, it is worth noting that the hashes and ordering will vary between Rust releases. Beware of relying on them inside of your code!


impl TypeId[src]

pub const fn of<T: ?Sized + 'static>() -> TypeId[src]

Returns the TypeId of the type this generic function has been instantiated with.


use std::any::{Any, TypeId};

fn is_string<T: ?Sized + Any>(_s: &T) -> bool {
    TypeId::of::<String>() == TypeId::of::<T>()

fn main() {
    assert_eq!(is_string(&0), false);
    assert_eq!(is_string(&"cookie monster".to_string()), true);

Trait Implementations

impl Copy for TypeId[src]

impl PartialEq<TypeId> for TypeId[src]

impl Eq for TypeId[src]

impl Ord for TypeId[src]

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

Compares and returns the maximum of two values. Read more

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

Compares and returns the minimum of two values. Read more

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

🔬 This is a nightly-only experimental API. (clamp #44095)

Returns max if self is greater than max, and min if self is less than min. Otherwise this will return self. Panics if min > max. Read more

impl PartialOrd<TypeId> for TypeId[src]

impl Clone for TypeId[src]

fn clone_from(&mut self, source: &Self)[src]

Performs copy-assignment from source. Read more

impl Hash for TypeId[src]

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

Feeds a slice of this type into the given [Hasher]. Read more

impl Debug for TypeId[src]

Auto Trait Implementations

impl Send for TypeId

impl Sync for TypeId

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 

impl<T> From for T[src]

impl<T, U> TryInto for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T, U> TryFrom for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized

impl<T> BorrowMut for T where
    T: ?Sized

impl<T> Any for T where
    T: 'static + ?Sized