<HTML> <HEAD> <!-- Created by texi2html 1.56k + clip patches and <A href="http://www.clip.dia.fi.upm.es/Software">lpdoc</A> from ciao.texi on 28 January 2007 --> <LINK rel="stylesheet" href="ciao.css" type="text/css"> <TITLE>The Ciao Prolog System - Pure Prolog package</TITLE> </HEAD> <BODY> Go to the <A HREF="ciao_1.html">first</A>, <A HREF="ciao_94.html">previous</A>, <A HREF="ciao_96.html">next</A>, <A HREF="ciao_241.html">last</A> section, <A HREF="ciao_toc.html">table of contents</A>. <P><HR><P> <H1><A NAME="SEC396" HREF="ciao_toc.html#TOC396">Pure Prolog package</A></H1> <P> <A NAME="IDX5250"></A> <P> <STRONG>Author(s):</STRONG> The CLIP Group. <P> <STRONG>Version:</STRONG> 1.10#7 (2006/4/26, 19:22:13 CEST) <P> <STRONG>Version of last change:</STRONG> 1.9#224 (2003/12/21, 20:16:18 CET) <P> This library package allows the use of <A NAME="IDX5251"></A> <A NAME="IDX5252"></A> <EM>pure Prolog</EM> in a Ciao module/program. It is based on the fact that if an <A NAME="IDX5253"></A> <A NAME="IDX5254"></A> <EM>engine module</EM> is imported explicitly then all of them have to be imported explicitly. The engine modules are: <UL> <LI><CODE>engine(arithmetic)</CODE> section <A HREF="ciao_23.html#SEC150">Arithmetic</A>. <LI><CODE>engine(atomic_basic)</CODE> section <A HREF="ciao_22.html#SEC147">Basic predicates handling names of constants</A>. <LI><CODE>engine(attributes)</CODE> section <A HREF="ciao_31.html#SEC178">Attributed variables</A>. <LI><CODE>engine(basic_props)</CODE> section <A HREF="ciao_18.html#SEC135">Basic data types and properties</A>. <LI><CODE>engine(basiccontrol)</CODE> section <A HREF="ciao_16.html#SEC128">Control constructs/predicates</A>. <LI><CODE>engine(data_facts)</CODE> section <A HREF="ciao_28.html#SEC167">Fast/concurrent update of facts</A>. <LI><CODE>engine(exceptions)</CODE> section <A HREF="ciao_26.html#SEC160">Exception handling</A>. <LI><CODE>engine(io_aux)</CODE> section <A HREF="ciao_30.html#SEC174">Message printing primitives</A>. <LI><CODE>engine(io_basic)</CODE> section <A HREF="ciao_25.html#SEC157">Basic input/output</A>. <LI><CODE>engine(prolog_flags)</CODE> section <A HREF="ciao_27.html#SEC163">Changing system behaviour and various flags</A>. <LI><CODE>engine(streams_basic)</CODE> section <A HREF="ciao_24.html#SEC153">Basic file/stream handling</A>. <LI><CODE>engine(system_info)</CODE> section <A HREF="ciao_32.html#SEC183">Gathering some basic internal info</A>. <LI><CODE>engine(term_basic)</CODE> section <A HREF="ciao_20.html#SEC141">Basic term manipulation</A>. <LI><CODE>engine(term_compare)</CODE> section <A HREF="ciao_21.html#SEC144">Comparing terms</A>. <LI><CODE>engine(term_typing)</CODE> section <A HREF="ciao_19.html#SEC138">Extra-logical properties for typing</A>. </UL> <P> Note that if any of these modules is explicitely imported in a program then the language defaults to Pure Prolog, plus the functionality added by the modules explicitely imported. <P> It is recommended that if you explicitely import an engine module you also use this package, which will guarantee that the predicate <CODE>true/0</CODE> is defined (note that this is the only Ciao builtin which cannot be redefined). <UL> <LI><A HREF="ciao_95.html#SEC397">Usage and interface (pure)</A> <LI><A HREF="ciao_95.html#SEC398">Known bugs and planned improvements (pure)</A> </UL> <H2><A NAME="SEC397" HREF="ciao_toc.html#TOC397">Usage and interface (<CODE>pure</CODE>)</A></H2> <div class="cartouche"> <UL> <LI><STRONG>Library usage:</STRONG> <CODE>:- use_package(pure).</CODE> or <CODE>:- module(...,...,[pure]).</CODE> </UL> </div class="cartouche"> <H2><A NAME="SEC398" HREF="ciao_toc.html#TOC398">Known bugs and planned improvements (<CODE>pure</CODE>)</A></H2> <UL> <LI> Currently, the following builtin predicates/program constructs cannot be redefined, in addition to <CODE>true/0</CODE>: <CODE>(->)/2</CODE> <CODE>(,)/2</CODE> <CODE>(+)/1</CODE> <CODE>if/3</CODE> </UL> <P><HR><P> Go to the <A HREF="ciao_1.html">first</A>, <A HREF="ciao_94.html">previous</A>, <A HREF="ciao_96.html">next</A>, <A HREF="ciao_241.html">last</A> section, <A HREF="ciao_toc.html">table of contents</A>. </BODY> </HTML>
