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!
Methods
impl TypeId[src]
impl TypeIdpub const fn of<T>() -> TypeId where
T: 'static + ?Sized, [src]
pub const 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]
impl Hash for TypeIdfn hash<__H>(&self, state: &mut __H) where
__H: Hasher, [src]
fn hash<__H>(&self, state: &mut __H) where
__H: Hasher, Feeds this value into the given [Hasher]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, 1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, Feeds a slice of this type into the given [Hasher]. Read more
impl Clone for TypeId[src]
impl Clone for TypeIdfn clone(&self) -> TypeId[src]
fn clone(&self) -> TypeIdReturns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl Debug for TypeId[src]
impl Debug for TypeIdfn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter. Read more
impl PartialOrd<TypeId> for TypeId[src]
impl PartialOrd<TypeId> for TypeIdfn partial_cmp(&self, other: &TypeId) -> Option<Ordering>[src]
fn partial_cmp(&self, other: &TypeId) -> Option<Ordering>This method returns an ordering between self and other values if one exists. Read more
fn lt(&self, other: &TypeId) -> bool[src]
fn lt(&self, other: &TypeId) -> boolThis method tests less than (for self and other) and is used by the < operator. Read more
fn le(&self, other: &TypeId) -> bool[src]
fn le(&self, other: &TypeId) -> boolThis method tests less than or equal to (for self and other) and is used by the <= operator. Read more
fn gt(&self, other: &TypeId) -> bool[src]
fn gt(&self, other: &TypeId) -> boolThis method tests greater than (for self and other) and is used by the > operator. Read more
fn ge(&self, other: &TypeId) -> bool[src]
fn ge(&self, other: &TypeId) -> boolThis method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
impl Ord for TypeId[src]
impl Ord for TypeIdfn cmp(&self, other: &TypeId) -> Ordering[src]
fn cmp(&self, other: &TypeId) -> OrderingThis method returns an Ordering between self and other. Read more
fn max(self, other: Self) -> Self1.21.0[src]
fn max(self, other: Self) -> SelfCompares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self1.21.0[src]
fn min(self, other: Self) -> SelfCompares and returns the minimum of two values. Read more
impl Eq for TypeId[src]
impl Eq for TypeIdimpl PartialEq<TypeId> for TypeId[src]
impl PartialEq<TypeId> for TypeIdfn eq(&self, other: &TypeId) -> bool[src]
fn eq(&self, other: &TypeId) -> boolThis method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &TypeId) -> bool[src]
fn ne(&self, other: &TypeId) -> boolThis method tests for !=.
impl Copy for TypeId[src]
impl Copy for TypeId