File: is_cons.doc

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\DOC is_cons

\TYPE {is_cons : (term -> bool)}

\SYNOPSIS
Tests a term to see if it is an application of {CONS}.

\DESCRIBE
{is_cons} returns {true} of a term representing a non-empty list. Otherwise it
returns {false}.

\FAILURE
Never fails.

\SEEALSO
mk_cons, dest_cons, mk_list, dest_list, is_list.

\ENDDOC