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<title>Metrics - Using the GNAT Programming Studio</title>
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<h3 class="section">13.6 Metrics</h3>

<p><a name="index-Metrics-622"></a>GPS provides an interface with the GNAT software metrics generation tool
<code>gnatmetric</code>.

   <p>The metrics can be computed for the entire project, one source file belonging to
the project, or (when applicable) a specific entity in the source file, e.g. a
subprogram.

   <p>The metrics generator can be invoked from two places inside GPS:

     <dl>
<dt><b><a href="The-Tools-Menu.html#The-Tools-Menu">The Tools Menu</a></b><dd>
          <dl>
<dt><samp><span class="command">Metrics-&gt;Compute metrics for root project</span></samp><dd>Generate metrics for all files from the root project.

          <br><dt><samp><span class="command">Metrics-&gt;Compute metrics for current file</span></samp><dd>Generate metrics for the current source file.

     </dl>

     <br><dt><b>The Contextual Menu</b><dd>
When relevant (depending on the context), right-clicking with your mouse
will show metrics-related contextual menu entries.

     <p>From a source file contextual menu, you have an option called
<samp><span class="command">Metrics for file</span></samp> that will generate the metrics for
the current file.

     <p>From a project contextual menu (see <a href="The-Project-View.html#The-Project-View">The Project View</a>), you have an
option <samp><span class="command">Metrics for project</span></samp> that will generate the metrics for
all files in the project.

   </dl>

   <p>Each of these commands produces a new window in the left-side area,
which shows the computed metrics as a hierarchical tree view. The metrics
are arranged by files, and then by scopes inside the files in a nested fashion. 
Double-clicking on any of the files or scopes displayed will open the
appropriate source location in the editor. Any errors encountered during
metrics computation will be displayed in the Locations Window.

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