File: is_const.doc

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\DOC is_const

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

\SYNOPSIS
Tests a term to see if it is a constant.

\DESCRIBE
{is_const "const:ty"} returns {true}. If the term is not a constant the
result is {false}.

\FAILURE
Never fails.

\SEEALSO
mk_const, dest_const, is_var, is_comb, is_abs.

\ENDDOC