<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61656>61656</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-tidy] readability-magic-numbers cannot handle `long double`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-tidy,
            false-positive
      </td>
    </tr>

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

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

<pre>
    Example:

```
void foo(long double);

int main()
{
 foo(1.0L);
}
```

Leads to:

```
$ clang-tidy -checks=-*,readability-magic-numbers main.cpp

warning: 1.0L is a magic number; consider replacing it with a named constant [readability-magic-numbers]
foo(1.0L);
        ^
```
[Repro on Compiler Explorer](https://godbolt.org/z/cMEfefabY).

This is problematic when one has user-defined floating literals, which as required by the standard must have a `long double` as input:

```
float operator ""_meters(long double x)
{
    return static_cast<float>(x);
}

void foo(float);

int main()
{
  foo(1.0_meters);  // Warning here
} 
```
```
</pre>
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