<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJy1VE1zmzAQ_TVw2TGDRSDmwCEhSU85NdO7vjBqZImRRFz313clJ_ijnemhzYyMtdKy7z30VsyKQ9drarYgrPRgbACh6NZYL6HPyD0OGGbDg7IGgtxNmgbMo0bAG3WKMi2XZRCSa-pozPWwV2GEMEowdCfBDkCXxNWEWTsZpMtIn5UPWXm3HxUfYXB2B7sDOEmFQk4qMjIrbs1g3Q5XimP2-7Mpj4NP03FlYZJVPZ2DBZpVj3Dce7NKYEw2GWmz6h4y8oQD638IDoojHZA_JsmDxFykcaYIpHPWneOfo4XDJJNQdoXIPh2RnxCTZo67D1D-f8RUXVyhic9CW_SdIeKr3seFBcy-4mwDSutVtIgUEZD6BTN--kuznOPdW_Tol75Pfn7--q0HbiMDZYAyO4dLvj5C9Y-glXmFMYTJZ9XdkcfWCmZ1KKzbYvQTfxvbSs7Gtj4xSM-X8dRYPiAudQI8klWDkv49EwW__KVzwI9U69SwDF1nZ1QQDW8OMFit7T72z_nHxiYKKAyPgR1SX3puJxnfOfZeXPoDDJPamq2_aLyofZEupS6Uxwk_qhKODgHDWKtwKIlUaaotp3rV5KKrRFu1NEf7jNZ13LrKBGXy2enu6qviFTKzAs8EA63fPv5Wk7Pf8XgxVN7PEeOprlpS52PHmg1rbmVNSr5uG14LgmA31bohkq3bcp1ripJ8l9VIlhi5h1QC51n9kP87A9WRkuBYb9britxsinbgZTvQRrCaSnJLsptS7qjSRawTDZO7LpVk89bjplY--NMmGl5tjZSJMDIMKugU8Hhr4wo8I4N02EvTAR73hW_RQ8slnpHm96v77Lr20XTJedhGJ-fBYokiT5K7pPcXOlMESQ>53925</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Missing diagnostic on declarations of function & variable templates with the same name as a template parameter.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          cor3ntin
      </td>
    </tr>
</table>

<pre>
    Clang does not diagnose C++ function templates and variable template declarations with the name of a template-parameter,
which from my reading is non-conforming.

```cpp
template <auto a> 
void a(); // no diagnostic, expected a redeclaration error

template <typename b> 
void b(); // no diagnostic, expected a redeclaration error

template <typename c> 
auto c = 0; // no diagnostic, expected a redeclaration error

template <auto d> 
auto d = 0; // no diagnostic, expected a redeclaration error

template <typename d> 
class d; // ok ( ill-formed, as expected)
```

Both GCC and MSVC complain about redeclarations (CE link https://godbolt.org/z/8o9ecbh95)

The C++ standard specifies
> The name of a template-parameter shall not be bound to any following declaration contained by the scope to which the template-parameter belongs.

http://eel.is/c++draft/temp.res#temp.local-6
</pre>
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