Cast between types, or rename an import.

A mutable variable, reference, or pointer.

Used to do value-to-value conversions while consuming the input value. It is the reciprocal of `Into`.

A trait for giving a type a useful default value.

`dyn` is a prefix of a trait object’s type.

Code or interfaces whose memory safety cannot be verified by the type system.

Same as `format_args`, but adds a newline in the end.

A marker trait which represents “panic safe” types in Rust.

A value-to-value conversion that consumes the input value. The opposite of `From`.

Used to determine whether a type contains any `UnsafeCell` internally, but not through an indirection. This affects, for example, whether a `static` of that type is placed in read-only static memory or writable static memory. This can be used to declare that a constant with a generic type will not contain interior mutability, and subsequently allow placing the constant behind references.