<html>
    <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 - Compilation error when applying std::views::transform to std::array"
   href="https://bugs.llvm.org/show_bug.cgi?id=49511">49511</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Compilation error when applying std::views::transform to std::array
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>C++2a
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>raffael@casagrande.ch
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Unfortunately the following code fails to compile (using the STL of g++-10.2):

==== begin test program ====
#include <ranges>
#include <array>

std::array<int,2> points_;

auto foo()  {
    auto v = std::views::transform([](int p) {return p;});
    return points_ | v;
}

int main() {
    auto z = foo();
}
==== end test program ====

The same code compiles without problems using g++-10.2 so I think it should be
valid code...

See also <a href="https://godbolt.org/z/e1ncvW">https://godbolt.org/z/e1ncvW</a></pre>
        </div>
      </p>


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