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<html lang="en">
<head>
<title>ECB - the Emacs Code Browser</title>
<meta http-equiv="Content-Type" content="text/html">
<meta name=description content="ECB - the Emacs Code Browser">
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<link href="http://www.gnu.org/software/texinfo/" rel=generator-home>
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<body>
<p>
Node:<a name="Using%20semanticdb">Using semanticdb</a>,
Previous:<a rel=previous accesskey=p href="Tree-buffer-styles.html#Tree-buffer%20styles">Tree-buffer styles</a>,
Up:<a rel=up accesskey=u href="Tips-and-tricks.html#Tips%20and%20tricks">Tips and tricks</a>
<hr><br>
<h3>Using semanticdb to jump to type-tags defined in other files</h3>
<p>In OO-languages like CLOS, eieio and C++ there can be type-tags in the
method-buffer which are somehow virtual because there is no definition
in the current source-file. But such a virtual type collects all its
outside defined members like methods in C++ which are defined in the
<code>*.cc</code> file whereas the class-definition is defined in the
associated header-file. ECB uses semanticdb to open the definition-file
of such a tag and to jump to the definition of this tag. Same for
parent-tags in the methods-buffer. This feature can only work
correctly if semanticdb is well configured!
<p>Here is a C++-example:
<p>This class is defined in a file <code>ParentClass.h</code>:
<br><pre>class ParentClass
{
protected:
int p;
};
</pre>
<p>This class is defined in a file <code>ClassWithExternals.h</code>
<br><pre>#include "ParentClass.h"
class ClassWithExternals : public ParentClass
{
private:
int i;
public:
ClassWithExternals();
~ClassWithExternals();
};
</pre>
<p>Both the constructor and the desctructor of the class
"ClassWithExternals" are defined in a file
<code>ClassWithExternals.cc</code>:
<br><pre>#include "test.h"
ClassWithExternals::ClassWithExternals(int i,
boolean b,
char c)
{
return;
}
void
ClassWithExternals::~ClassWithExternals()
{
return;
}
</pre>
<p>ECB displays the contents of <code>ClassWithExternals.cc</code> in its methods-buffer like
follows:
<br><pre>[-] [Includes]
`- test.h
[-] ClassWithExternals
| +ClassWithExternals (+i:int, +b:class boolean, +c:char):ClassWithExternals
`- +~ClassWithExternals ():void
</pre>
<p>Both the constructor and the desctructor of the class
"ClassWithExternals" are grouped under their class-type. ECB now
uses semanticdb to jump to the definition of class
"ClassWithExternals" when you click onto the type-node
"ClassWithExternals" in the methods-buffer.
<p>The contents of <code>ClassWithExternals.h</code> are displayed like
follows:
<br><pre>[-] [Includes]
`- ParentClass.h
[-] ClassWithExternals:class
| [-] [Parents]
| `- ParentClass
| [-] [Variables]
| `- -i:int
| +ClassWithExternals ():ClassWithExternals
| +~ClassWithExternals ():void
`- [+] [Misc]
</pre>
<p>ECB uses semanticdb to jump to the definition of the class
"ParentClass" when you click onto the node "ParentClass".
<p>To enable this feature <code>global-semanticdb-minor-mode</code> must be
enabled and semanticdb must be correctly configured. This means
mainly that the option <code>semanticdb-project-roots</code> must be setup
well. See the manual of semanticdb for further informations about
this.
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