<!doctype html public "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>mode/2</title> <link rel=stylesheet href="../../styles.css" type="text/css"> </head> <body> <hr /> <h2><a class="back" title="Return to index" href="../index.html#mode2"><code>mode/2</a></code></h2> <hr /> <h4>Description</h4> <blockquote> <pre> mode(Mode, Number_of_solutions) </pre> <p> Most predicates can be used with several instantiations modes. This directive enables the specification of each instantiation mode and the corresponding number of solutions/proofs. </p> </blockquote> <h4>Template and modes</h4> <blockquote> <pre> mode(+predicate_mode_term, +number_of_solutions) </pre> </blockquote> <h4>Examples</h4> <blockquote> <pre> :- mode(append(-, -, +), zero_or_more). :- mode(append(+list, +list, -list), zero_or_one). :- mode(var(@term), zero_or_one). :- mode(arg(-, -, +), error). </pre> </blockquote> <hr /> <p class="center"> <strong><a href="metapredicate1.html">Previous</a> | <a href="op3.html">Next</a> | <a href="../index.html">Table of Contents</a> | <a href="../../bibliography.html">Bibliography</a> | <a href="../../glossary.html">Glossary</a></strong> </p> <p class="center"> Last updated on: July 4, 2000 </p> <hr /> </body> </html>