@code{(require 'srfi)} @ftindex srfi @noindent Implements @dfn{Scheme Request For Implementation} (SRFI) as @cindex Scheme Request For Implementation described at @url{http://srfi.schemers.org/} @defmac cond-expand @dots{} @emph{Syntax:} Each @r{} should be of the form @format @t{(@r{} @r{} @dots{})} @end format where @r{} is a boolean expression composed of symbols and `and', `or', and `not' of boolean expressions. The last @r{} may be an ``else clause,'' which has the form @format @t{(else @r{} @r{} @dots{})@r{.}} @end format The first clause whose feature expression is satisfied is expanded. If no feature expression is satisfied and there is no else clause, an error is signaled. SLIB @code{cond-expand} is an extension of SRFI-0, @url{http://srfi.schemers.org/srfi-0/srfi-0.html}. @end defmac