Arguments: primary-function indicator fwrap-function
Returns the primary function object, after giving it an indicated fwrapper. Arguments primary-function and fwrap-function can each either be a function-spec or the actual function object. indicator may be any object for which eq comparisons are appropriate, as if with getf. Typically this might be a symbol.
The ordering of fwrapped functions is specified as follows: If an fwrapper of the same indicator was present on this primary-function before the call, then the order is not changed; the fwrap call simply replaces that fwrapper with the specified fwrap-function wherever it was previously. If no fwrapper of the same indicator yet existed on this primary-function, then a new fwrapper is established as the outsermost fwrapper, i.e. the one which will be called before any others.
The ordering of the fwrappers can be manipulated by using fwrap-order.
Whenever the primary-function is described using describe, all fwrappers wrapped around the primary-function are listed in their outermost to innermost order.
See fwrappers-and-advice.htm for information of fwrapping functions (and on the older, deprecated advice facility).
The documentation is described in introduction.htm and the index is in index.htm.
Copyright (c) 1998-2000, Franz Inc. Berkeley, CA., USA. All rights reserved.
Created 2000.10.5.