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    <head>
      <base href="http://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - C++11 Narrowing conversion from int to double should give warning, not error"
   href="http://llvm.org/bugs/show_bug.cgi?id=17833">17833</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>C++11 Narrowing conversion from int to double should give warning, not error
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.3
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++11
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>agner@agner.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Implicit conversion from int to double generates error under C++11:
error: non-constant-expression cannot be narrowed from type 'int' to 'double'.

In my opinion, this should be a warning, not an error, because it breaks
correct legacy code. The conversion from int to double is not in fact
narrowing, because there is no 32-bit integer value that cannot be represented
as a double.

Please see <a href="http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49793">http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49793</a></pre>
        </div>
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