Struct std::any::TypeId 1.0.0[−][src]
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!
Implementations
impl TypeId
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impl TypeId
[src]pub const fn of<T>() -> TypeId where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
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 PartialOrd<TypeId> for TypeId
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impl PartialOrd<TypeId> for TypeId
[src]impl Copy for TypeId
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impl Eq for TypeId
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impl StructuralEq for TypeId
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impl StructuralPartialEq for TypeId
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Auto Trait Implementations
impl RefUnwindSafe for TypeId
impl Send for TypeId
impl Sync for TypeId
impl Unpin for TypeId
impl UnwindSafe for TypeId
Blanket Implementations
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
impl<T> Borrow<T> for T where
T: ?Sized,
[src]pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
[src]
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W
[src]
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W