<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/87907>87907</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-format] Incorrect formatting when function is named instanceof
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-format
      </td>
    </tr>

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

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

<pre>
    My .clang-format contains 
```
SpaceAfterCStyleCast: false
SpaceBeforeAssignmentOperators: true
SpaceBeforeCtorInitializerColon: false
SpaceBeforeInheritanceColon: false
SpaceBeforeParens: Never
SpaceBeforeRangeBasedForLoopColon: false
SpaceAfterTemplateKeyword: false
SpaceInEmptyParentheses: false
SpacesBeforeTrailingComments: 1
SpacesInAngles: false
SpacesInCStyleCastParentheses: false
SpacesInParentheses: false
SpacesInSquareBrackets: false
```
which should result in parentheses after function identifier being stuck to the identifier.

In the following snippet
```cpp
struct Value;

template<typename T>
[[nodiscard]] bool instanceof (Value const* value);

void replace_uses_with(Value* value, Value* replacement);
```
clang-format insists on erroneously inserting a space after the identifier `instanceof`, but does not do so in the case of `replace_uses_with`. This seems to happen only with `instanceof`.
</pre>
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