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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Deriving from cl::parser<unsigned> recommended but impossible"
href="https://llvm.org/bugs/show_bug.cgi?id=25104">25104</a>
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<th>Summary</th>
<td>Deriving from cl::parser<unsigned> recommended but impossible
</td>
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<th>Product</th>
<td>Documentation
</td>
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<th>Version</th>
<td>3.7
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>General docs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>serge.guelton@telecom-bretagne.eu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>In ``cl`` documentation, section _Writing a custom parser_ (see
<a href="http://llvm.org/docs/CommandLine.html#writing-a-custom-parser">http://llvm.org/docs/CommandLine.html#writing-a-custom-parser</a>)
The following snippet appears:
```
struct FileSizeParser : public cl::parser<unsigned> {
// parse - Return true on error.
bool parse(cl::Option &O, StringRef ArgName, const std::string &ArgValue,
unsigned &Val);
};
```
This is invalid, as ``cl::parser<unsigned>`` is marked as a ``final`` class.
(BTW, it seems to me that removing the final here would be nicer than updating
the doc.)</pre>
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