Trait Is 

pub trait Is {
    // Required method
    fn is<T>() -> bool
       where T: Any;
}

Checks if the current type “is” another type, using a TypeId equality comparison.

Required Methods

fn is<T>() -> bool

where T: Any,

Checks if the current type “is” another type, using a TypeId equality comparison. This is most useful in the context of generic logic.

fn greet_if_u32<T: Any>() {
    if T::is::<u32>() {
        println!("Hello");
    }
}
// this will print "Hello"
greet_if_u32::<u32>();
// this will not print "Hello"
greet_if_u32::<String>();
assert!(u32::is::<u32>());
assert!(!usize::is::<u32>());

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<A> Is for A

where A: Any,