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+<title>Debugging with GDB: M2 Scope</title>
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+Next: <a href="GDB_002fM2.html#GDB_002fM2" accesskey="n" rel="next">GDB/M2</a>, Previous: <a href="M2-Checks.html#M2-Checks" accesskey="p" rel="previous">M2 Checks</a>, Up: <a href="Modula_002d2.html#Modula_002d2" accesskey="u" rel="up">Modula-2</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="The-Scope-Operators-_003a_003a-and-_002e"></a>
+<h4 class="subsubsection">15.4.9.8 The Scope Operators <code>::</code> and <code>.</code></h4>
+<a name="index-scope"></a>
+<a name="index-_002e_002c-Modula_002d2-scope-operator"></a>
+<a name="index-colon_002c-doubled-as-scope-operator"></a>
+<a name="index-_003a_003a_002c-in-Modula_002d2"></a>
+
+<p>There are a few subtle differences between the Modula-2 scope operator
+(<code>.</code>) and the <small>GDB</small> scope operator (<code>::</code>).  The two have
+similar syntax:
+</p>
+<div class="smallexample">
+<pre class="smallexample">
+<var>module</var> . <var>id</var>
+<var>scope</var> :: <var>id</var>
+</pre></div>
+
+<p>where <var>scope</var> is the name of a module or a procedure,
+<var>module</var> the name of a module, and <var>id</var> is any declared
+identifier within your program, except another module.
+</p>
+<p>Using the <code>::</code> operator makes <small>GDB</small> search the scope
+specified by <var>scope</var> for the identifier <var>id</var>.  If it is not
+found in the specified scope, then <small>GDB</small> searches all scopes
+enclosing the one specified by <var>scope</var>.
+</p>
+<p>Using the <code>.</code> operator makes <small>GDB</small> search the current scope for
+the identifier specified by <var>id</var> that was imported from the
+definition module specified by <var>module</var>.  With this operator, it is
+an error if the identifier <var>id</var> was not imported from definition
+module <var>module</var>, or if <var>id</var> is not an identifier in
+<var>module</var>.
+</p>
+
+
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