yap-6.3/Logtalk/manuals/refman/control/to_self1.html

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		<title>Logtalk control construct: ::/1</title>
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<h2><code>::/1</code></h2>


<h4>Description</h4>

<blockquote>
<pre>::Predicate

::(Predicate1, Predicate2, ...)

::(Predicate1; Predicate2; ...)</pre>
<p>
	Send a message to <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a>. Only used in the body of a predicate definition. The argument should match a public or protected predicate of <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a>. It may also match a private predicate if the predicate is within the scope of the object where the method making the call is defined, if imported from a category, if used from inside a category, or when using private inheritance. We can also send a set of messages to self. The "<code>,</code>" and "<code>;</code>" in the list have the usual Prolog meaning.
</p>
</blockquote>

<h4>Template and modes</h4>

<blockquote>
<pre>::+messages</pre>
</blockquote>

<h4>Errors</h4>

<blockquote>
	<dl>
		<dt>Predicate is a variable:</dt>
			<dd><code>instantiation_error</code></dd>
		<dt>Predicate is declared private:</dt>
			<dd><code>permission_error(access, private_predicate, Predicate)</code></dd>
		<dt>Predicate is not declared:</dt>
			<dd><code>existence_error(predicate_declaration, Predicate)</code></dd>
	</dl>
</blockquote>

<h4>Examples</h4>

<blockquote>
<pre>area(Area) :-
    ::width(Width),
    ::height(Height),
    Area is Width*Height.</pre>
</blockquote>

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			`<title>Logtalk control construct: ::/1</title>`
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Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`<div class="navtop">`
			`<a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#constructs">control constructs</a>`
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			`<h2><code>::/1</code></h2>`

Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00
			`<h4>Description</h4>`

			`<blockquote>`
Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`<pre>::Predicate`
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00
			`::(Predicate1, Predicate2, ...)`

Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`::(Predicate1; Predicate2; ...)</pre>`
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00			`<p>`
Logtalk 2.18.0 release files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1090 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2004-07-09 00:48:59 +01:00			Send a message to <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a>. Only used in the body of a predicate definition. The argument should match a public or protected predicate of <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a>. It may also match a private predicate if the predicate is within the scope of the object where the method making the call is defined, if imported from a category, if used from inside a category, or when using private inheritance. We can also send a set of messages to self. The "<code>,</code>" and "<code>;</code>" in the list have the usual Prolog meaning.
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00			`</p>`
			`</blockquote>`

			`<h4>Template and modes</h4>`

			`<blockquote>`
Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`<pre>::+messages</pre>`
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00			`</blockquote>`

Updated to Logtalk 2.9.1 git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@211 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-12-05 23:57:48 +00:00			`<h4>Errors</h4>`
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00
			`<blockquote>`
			`<dl>`
			`<dt>Predicate is a variable:</dt>`
			`<dd><code>instantiation_error</code></dd>`
			`<dt>Predicate is declared private:</dt>`
			`<dd><code>permission_error(access, private_predicate, Predicate)</code></dd>`
			`<dt>Predicate is not declared:</dt>`
			`<dd><code>existence_error(predicate_declaration, Predicate)</code></dd>`
			`</dl>`
			`</blockquote>`

			`<h4>Examples</h4>`

			`<blockquote>`
Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`<pre>area(Area) :-`
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00			`::width(Width),`
			`::height(Height),`
Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`Area is Width*Height.</pre>`
Logtalk files git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@55 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2001-06-06 21:07:01 +01:00			`</blockquote>`

Logtalk 2.15.5 files. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@955 b08c6af1-5177-4d33-ba66-4b1c6b8b522a 2003-12-30 13:33:51 +00:00			`<div class="navbottom">`
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