<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/124913>124913</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Syntax error for overloaded operator[] in 32-bit address space
        </td>
    </tr>

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

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

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

<pre>
    **x86-64 clang 19.1.0** issues a compilation error for the following example:
1. cat ex.cpp
```
struct value {
 public:
        operator int() const;
        struct value &operator[](const char * __ptr32 _param_1);
};

extern struct value *new_value();

int json_send_error(int status)
{
  struct value * v = new_value();
  (void)(*v)["error"];
  return 0;
}
```
2. clang ex.c -fms-extensions -S
```
ex.cpp:13:13: error: use of overloaded operator '[]' is ambiguous (with operand types 'struct value' and 'const char[6]')
   13 | (void)(*v)["error"];
      |         ~~~~^~~~~~~~
ex.xpp:5:23: note: candidate function
    5 |         struct value &operator[](const char * __ptr32 _param_1);
      |                       ^
ex.cpp:13:13: note: built-in candidate operator[](long, const char *)
   13 | (void)(*v)["error"];
      |             ^
1 error generated.
```
https://godbolt.org/z/dbvEGfz13

**x64 MSVC v.19** compiles successfully https://godbolt.org/z/qWc584f5f 
</pre>
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