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>() } fn main() { assert_eq!(is_string(&0), false); assert_eq!(is_string(&"cookie monster".to_string()), true); }Run
Trait Implementations
impl Copy for TypeId[src]
impl PartialEq<TypeId> for TypeId[src]
impl Eq for TypeId[src]
impl Ord for TypeId[src]
fn cmp(&self, other: &TypeId) -> Ordering[src]
fn max(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
Self: Sized,
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
Self: Sized,
Compares and returns the minimum of two values. Read more
fn clamp(self, min: Self, max: Self) -> Self where
Self: Sized, [src]
Self: Sized,
Restrict a value to a certain interval. Read more
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 Clone for TypeId[src]
fn clone(&self) -> TypeId[src]
fn clone_from(&mut self, source: &Self)[src]
Performs copy-assignment from source. Read more
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,
Feeds a slice of this type into the given [Hasher]. Read more
impl Debug for TypeId[src]
Auto Trait Implementations
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T> From<T> for T[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(Self) -> Result<U, <U as TryFrom<T>>::Error>[src]
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> 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> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,