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@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 <clause1> <clause2> @dots{}


@emph{Syntax:}
Each @r{<clause>} should be of the form

@format
@t{(@r{<feature>} @r{<expression1>} @dots{})}
@end format

where @r{<feature>} is a boolean expression composed of symbols and
`and', `or', and `not' of boolean expressions.  The last @r{<clause>}
may be an ``else clause,'' which has the form

@format
@t{(else @r{<expression1>} @r{<expression2>} @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