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>()

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

Trait Implementations

impl StructuralPartialEq for TypeId[src]

impl StructuralEq for TypeId[src]

impl Copy for TypeId[src]

impl PartialEq<TypeId> for TypeId[src]

impl Eq for TypeId[src]

impl Ord for TypeId[src]

impl PartialOrd<TypeId> for TypeId[src]

impl Clone for TypeId[src]

impl Hash for TypeId[src]

impl Debug for TypeId[src]

Auto Trait Implementations

impl Send for TypeId

impl Sync for TypeId

impl Unpin for TypeId

Blanket Implementations

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

impl<T> From<T> for T[src]

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

type Error = Infallible

The type returned in the event of a conversion error.

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

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

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