A marker for types which can be used as types of `const` generic parameters.

Constructs a `Box<T>` by calling the `exchange_malloc` lang item and moving the argument into the newly allocated memory. This is an intrinsic to avoid unnecessary copies.

Initialization value for static `Once` values.

Representation of the various timestamps on a file.

`Request` supports generic, type-driven access to data. Its use is currently restricted to the standard library in cases where trait authors wish to allow trait implementors to share generic information across trait boundaries. The motivating and prototypical use case is `core::error::Error` which would otherwise require a method per concrete type (eg. `std::backtrace::Backtrace` instance that implementors want to expose to users).

A struct to help with `fmt::Debug` implementations.

Error returned for the buffered data from `BufWriter::into_parts`, when the underlying writer has previously panicked. Contains the (possibly partly written) buffered data.

The error type for operations on the `PATH` variable. Possibly returned from `env::join_paths()`.

Creates a future which never resolves, representing a computation that never finishes.

A locked reference to the `Stdin` handle.