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.

Bitwise or with the current value, returning the previous value.

Maximum with the current value using an unsigned comparison.

A compiler-only memory barrier.

This enumeration is the list of the possible error outcomes for the `try_send` method.

Used for indexing operations (`container[index]`) in mutable contexts.

OS-specific extensions to `fs::Metadata`.

The addition assignment operator `+=`.

Marks that `Src` is transmutable into `Self`.

`RangeBounds` is implemented by Rust’s built-in range types, produced by range syntax like `..`, `a..`, `..b`, `..=c`, `d..e`, or `f..=g`.