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<h1> Using Prolog within Emacs </h1>

You can run prolog from within Emacs providing a programming
environment which offers several advantages, including auto
indentation, syntax highlighting, help on predefined predicates,
consultation and compilation from inside Emacs, auto-fill mode, and
more.


<h2> Seting up your .emacs file </h2>

Put the following lines in your .emacs file.
<ul>
<pre>
(setq load-path (cons "/usr/local/sicstus3" load-path))

(autoload 'run-prolog "prolog" "Start a Prolog sub-process." t)
(autoload 'prolog-mode "prolog" "Major mode for editing Prolog programs." t)

(setq prolog-system 'sicstus)
(setq auto-mode-alist (cons '("\\.pl$" . prolog-mode) auto-mode-alist))

(add-hook 'prolog-mode-hook 'turn-on-font-lock)

(autoload 'prolog-menu-hook-function "prolog-menu" t)
(add-hook 'prolog-mode-hook 'prolog-menu-hook-function)
</pre>
</ul>


<h2>Running prolog  </h2>

A prolog process can be started within Emacs by choosing Run Prolog
from the menu, by typing <i>C-c RET</i> (control-c followed by a
return), or by typing <i>M-x run-prolog</i> (M-x is escape followed by
x). It is however not strictly necessary to start a prolog process
manually since it is automatically done when needed. The process can
be restarted (i.e. the old one is killed and a new one is created) by
typing <i>C-u C-c RET</i>.  The process will appear in another window
named <i> *prolog* </i>.  You can always get back to the prolog window
by typing <i> C-x b *prolog* </i> or even <i> M-x run-prolog </i>.

<h2>The Basic Prolog Commands </h2>

The most useful commands that the Prolog mode provides are ones to
consult and/or compile portions of one of your editing
buffers. Consultation and compilation is either done via the menu or
with the following key-bindings:

<ul>

<li><b>C-c C-b</b> - Consult entire buffer. 
<li><b>C-c C-r</b> -  Consult current region. 
<li><b>C-c C-p</b> -  Consult predicate pointer is in.
<li><b>C-c C-c b</b> -     Compile and load entire buffer. 
<li><b>C-c C-c r</b> -     Compile and load current region. 
<li><b>C-c C-c p</b> -     Compile and load predicate pointer is in.
</ul>

<h2> For more information </h2>

See the section of the manual on the <a
href="http://www.sics.se/isl/sicstus/sicstus_4.html#IDX64"> GNU Emacs
interface </i>.

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