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    <head>
      <base href="https://bugs.llvm.org/">
    </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 - std::basic_stringstream is not working with std::byte"
   href="https://bugs.llvm.org/show_bug.cgi?id=40270">40270</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>std::basic_stringstream is not working with std::byte
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libc++
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>7.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </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>All Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>mail@hanicka.net
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=21307" name="attach_21307" title="source code to emit the error">attachment 21307</a> <a href="attachment.cgi?id=21307&action=edit" title="source code to emit the error">[details]</a></span>
source code to emit the error

I can't compile std::basic_stringstream<std::byte, ByteCharTraits> with only
constructor. GCC accepts this code.

It gives error in basic_stringbuf::allocator on sputc function.



clang++ -stdlib=libc++ byte_stream.cpp -std=c++17




In file included from byte_stream.cpp:1:
/usr/local/Cellar/llvm/7.0.0/include/c++/v1/sstream:562:28: error: cannot
initialize a parameter of type 'std::__1::basic_streambuf<std::byte,
      ByteCharTraits>::char_type' (aka 'std::byte') with an lvalue of type
'std::__1::basic_stringbuf<std::byte, ByteCharTraits,
      std::__1::allocator<std::byte> >::int_type' (aka 'int')
        return this->sputc(__c);
                           ^~~
/usr/local/Cellar/llvm/7.0.0/include/c++/v1/sstream:866:28: note: in
instantiation of member function 'std::__1::basic_stringbuf<std::byte,
      ByteCharTraits, std::__1::allocator<std::byte> >::overflow' requested
here
class _LIBCPP_TEMPLATE_VIS basic_stringstream
                           ^
/usr/local/Cellar/llvm/7.0.0/include/c++/v1/streambuf:221:30: note: passing
argument to parameter '__c' here
    int_type sputc(char_type __c) {
                             ^
1 error generated.</pre>
        </div>
      </p>


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