File: rotate.doc

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\DOC rotate

\TYPE {rotate : int -> refinement}

\SYNOPSIS
Rotate a goalstate.

\DESCRIBE
The function {rotate n gl} rotates a list {gl} of subgoals by {n} places. The 
function {r} is the special case where this modification is applied to the
imperative variable of unproven subgoals.

\FAILURE
Fails only if the list of goals is empty.

\SEEALSO
r.

\ENDDOC