1.0.0[−][src]Struct core::any::TypeId
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!
Methods
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.
Examples
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 Clone for TypeId[src]
fn clone(&self) -> TypeId[src]
fn clone_from(&mut self, source: &Self)[src]
impl Copy for TypeId[src]
impl Debug for TypeId[src]
impl Eq for TypeId[src]
impl Hash for TypeId[src]
fn hash<__H: Hasher>(&self, state: &mut __H)[src]
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized, 1.3.0[src]
Self: Sized,
impl Ord for TypeId[src]
fn cmp(&self, other: &TypeId) -> Ordering[src]
#[must_use]
fn max(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
Self: Sized,
#[must_use]
fn min(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
Self: Sized,
#[must_use]
fn clamp(self, min: Self, max: Self) -> Self where
Self: Sized, [src]
Self: Sized,
impl PartialEq<TypeId> for TypeId[src]
impl PartialOrd<TypeId> for TypeId[src]
fn partial_cmp(&self, other: &TypeId) -> Option<Ordering>[src]
fn lt(&self, other: &TypeId) -> bool[src]
fn le(&self, other: &TypeId) -> bool[src]
fn gt(&self, other: &TypeId) -> bool[src]
fn ge(&self, other: &TypeId) -> bool[src]
impl StructuralEq for TypeId[src]
impl StructuralPartialEq for TypeId[src]
Auto Trait Implementations
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut Self) -> &mut T[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,