File: is_pair.doc

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\DOC is_pair

\TYPE {is_pair : term -> bool}

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

\DESCRIBE
{is_pair `(t1,t2)`} returns {true}. If the term is not a pair the result is
{false}.

\FAILURE
Never fails.

\EXAMPLE
{
  # is_pair `1,2,3`;;
  val it : bool = true

  # is_pair `[1;2;3]`;;
  val it : bool = false
}

\SEEALSO
dest_pair, is_cons, mk_pair.

\ENDDOC