A "pipe" operator. x |> f is equivalent to f x.

See ppx_pipebang for further details.

Produces a function that just returns its first argument.

Ignores its argument and returns ().

Negates a boolean function.

forever f runs f () until it throws an exception and returns the exception. This function is useful for read_line loops, etc.

apply_n_times ~n f x is the n-fold application of f to x.

The identity function.

See also: Sys.opaque_identity.

compose f g x is f (g x).

Reverses the order of arguments for a binary function.