Special Forms

Table 2: EusLisp's special forms

and	flet	quote
block	function	return-from
catch	go	setq
cond	if	tagbody
declare	labels	the
defmacro	let	throw
defmethod	let*	unwind-protect
defun	progn	while
eval-when	or

All the special forms are listed in Table 2. macrolet, compiler-let, and progv have not been implemented. Special forms are essential language constructs for the management of evaluation contexts and control flows. The interpreter and compiler have special knowledge to process each of these constructs properly, while the application method is uniform for all functions. Users cannot add their own special form definition.