<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/59968>59968</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            compiler does not warn of shadowing of base class type alias
        </td>
    </tr>

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

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

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

<pre>
    Saw this code and I feel the compiler should be warning(luckily the implicit conversion warning does get diagnosed in this case) but the compiler, if possible, should have a warning to tell the user that their template parameter is shadowing an identifier in the base class

```cpp
#include <iostream>

struct Base {
        using Type = int;
};

template <typename Type>
struct Derived : Base {
    Type field;
};


int main() {
    Derived<double> d;
    d.field = 1.23;
    std::cout << d.field << "\n";
 return 0;
}
```

outputs 
```
1
```


https://gcc.godbolt.org/z/e7EK39cnP

</pre>
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