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\DOC is_setenum
\TYPE {is_setenum : term -> bool}
\SYNOPSIS
Tests if a term is a set enumeration.
\DESCRIBE
When applied to a term that is an explicit set enumeration {`{{t1,...,tn}}`},
the function {is_setenum} returns {true}; otherwise it returns {false}.
\FAILURE
Never fails.
\EXAMPLE
{
# is_setenum `1 INSERT 2 INSERT {{}}`;;
val it : bool = true
# is_setenum `{{1,2,3,4,1,2,3,4}}`;;
val it : bool = true
# is_setenum `1 INSERT 2 INSERT s`;;
val it : bool = false
}
\SEEALSO
dest_setenum, mk_fset, mk_setenum.
\ENDDOC
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