100 lines
4.3 KiB
HTML
100 lines
4.3 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Operators - Enigma</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Enigma">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Language.html#Language" title="Language">
|
|
<link rel="prev" href="Language.html#Language" title="Language">
|
|
<link rel="next" href="Numbers.html#Numbers" title="Numbers">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This manual is for Enigma, version 0.1.
|
|
Copyright (C) 2010 Niels Serup
|
|
|
|
Permission is granted to copy, distribute and/or modify this
|
|
document under the terms of the GNU Free Documentation License,
|
|
Version 1.3 or any later version published by the Free Software
|
|
Foundation; with no Invariant Sections, no Front-Cover Texts, and
|
|
no Back-Cover Texts. A copy of the license is included in the
|
|
section entitled "GNU Free Documentation License".
|
|
|
|
This document is also available under the terms of the Creative
|
|
Commons Attribution-Share Alike 3.0 (or any later version)
|
|
Unported license. A copy of the license is available at
|
|
`http://creativecommons.org/licenses/by-sa/3.0/legalcode'.
|
|
-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="Operators"></a>
|
|
<p>
|
|
Next: <a rel="next" accesskey="n" href="Numbers.html#Numbers">Numbers</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="Language.html#Language">Language</a>,
|
|
Up: <a rel="up" accesskey="u" href="Language.html#Language">Language</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h3 class="section">2.1 Operators</h3>
|
|
|
|
<p><a name="index-operators-2"></a>Enigma has 4 operators: <code>!</code>, <code>=</code>, <code>|</code>, and
|
|
<code>*</code>. <code>!</code> and <code>=</code> are the most important ones.
|
|
|
|
<p>To assign values to variables, use the <code>=</code> operator. For example:
|
|
<pre class="verbatim">obj = hello-string;
|
|
</pre>
|
|
Here, the variable <code>hello-string</code> receives the object <code>obj</code>. Note
|
|
the syntax. The objects comes first. Unless <code>hello-string</code> is
|
|
already defined, it is created as a local variable.
|
|
|
|
<p>Now, say we have a function called <code>think</code> and we want to send
|
|
objects to it. This is how that's done:
|
|
|
|
<pre class="verbatim">obj1 obj2 obj3 ! think;
|
|
</pre>
|
|
|
|
<p>There are no limits to the amount of objects that can be sent to a
|
|
function. Whitespace characters are used to separate objects, also when
|
|
assigning them to a variable. There <em>is</em> a difference between
|
|
using one object and more objects as arguments, though. When using only
|
|
one object, that object is simply used, but when using more objects, a
|
|
list containing all objects is created and transmitted instead. So, in
|
|
reality, when assigning two or more objects to a variable, the variable
|
|
points to a list with the objects. More about lists later.
|
|
|
|
<p>The <code>|</code> operator is merely a shortcut operator. It can merge
|
|
several commands into one, long command. See the following example:
|
|
|
|
<pre class="verbatim"># Long version
|
|
a ! b = c;
|
|
d c ! e = c;
|
|
# Short version
|
|
a ! b | d temp ! e = c;
|
|
</pre>
|
|
|
|
<p>Here, <code>a</code> is sent to <code>b</code>, which is then — together with
|
|
<code>d</code> — sent to <code>e</code> and saved in <code>c</code>. The <code>|</code> acts
|
|
like the semicolon, but it copies the return value of the last function
|
|
(in this case <code>b</code>) and stores the value in the local variable
|
|
<code>temp</code>. Hackers are encouraged to use this operator.
|
|
|
|
<p>The final operator, <code>*</code>, has the same function as <code>=</code>, except
|
|
that it works on a global level. So, if the code is <code>b = a;</code> and
|
|
<code>a</code> does not exist, it is created — in the global space.
|
|
|
|
</body></html>
|
|
|