File: is_pred.doc

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\DOC is_pred

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

\SYNOPSIS
Determines whether the operator of a combination is a constant.

\DESCRIBE
The function {is_pred} returns {true} when applied to a term of the form {"c
tm"} where {c} is a constant. Otherwise it returns {false}.

\EXAMPLE
{
   #is_pred "SUC 0";;
   true : bool
}
\COMMENTS
This function may be reimplemented.

\SEEALSO
dest_pred

\ENDDOC