DelElement deletes an element.

ElementErrorLevel returns the level of an error returned by MakeElement or DelElement.

FromGet makes a variable from a get callback.

FromPtr creates a variable from a pointer.

FromSetGet makes a variable from a set callback and a get callback.

HeadOfElement gets the underlying head variable of an element variable, or nil if the argument is not an element variable.

IsBlackhole returns whether the variable is a blackhole variable.

MakeElement returns a variable, that when set, simulates the mutation of an element.

NewAnyWithInit creates a variable with an initial value.

NewBlackhole returns a blackhole variable.

NewElement returns an ephemeral variable used for assigning variable element.

NewEnv returns an environment variable.

Var represents an Elvish variable.