Struct std::any::TypeId 1.0.0
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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.
Methods
impl TypeId[src]
fn of<T>() -> TypeId where 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>() } fn main() { assert_eq!(is_string(&0), false); assert_eq!(is_string(&"cookie monster".to_string()), true); }Run
Trait Implementations
impl Hash for TypeId[src]
fn hash<__H>(&self, __arg_0: &mut __H) where __H: Hasher
Feeds this value into the state given, updating the hasher as necessary.
fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher1.3.0
Feeds a slice of this type into the state provided.
impl Copy for TypeId[src]
impl Eq for TypeId[src]
impl PartialEq<TypeId> for TypeId[src]
fn eq(&self, __arg_0: &TypeId) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &TypeId) -> bool
This method tests for !=.
impl Clone for TypeId[src]
fn clone(&self) -> TypeId
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source. Read more