<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64520>64520</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            CXXConstructorDecl::isDelegatingConstructor fails to detect delegating constructor
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            bug,
            clang:frontend
      </td>
    </tr>

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

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

<pre>
    Example:
```
 struct A {
    A() : A(42) {}
    explicit A(int value) : value_(value) {}
    int value_;
  };

  template <typename T>
  struct C {
    C() : C(T()) {}
    explicit C(T value) : value_(value) {}
    T value_;
  };
```

AST:
```
  | |-CXXConstructorDecl 0x55f1964ac568 <line:586:5, col:18> col:5 A<T> 'void ()' implicit-inline
  |   | |-CXXCtorInitializer 'A<T>':'A<T>'
  |   | | `-ParenListExpr 0x55f1964ac888 <col:12, col:15> 'NULL TYPE'
  |   | | `-IntegerLiteral 0x55f1964ac868 <col:13> 'int' 42
  |   | `-CompoundStmt 0x55f1964ac918 <col:17, col:18>
```

Instead looks like initializer is being marked as base initializer.
</pre>
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