<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Incorrect CursorKind for lambda expression"
   href="https://bugs.llvm.org/show_bug.cgi?id=48103">48103</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Incorrect CursorKind for lambda expression
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>11.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>libclang
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>s.zvyagin83@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>klimek@google.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=24140" name="attach_24140" title="python script for parsing C++ source and printing AST">attachment 24140</a> <a href="attachment.cgi?id=24140&action=edit" title="python script for parsing C++ source and printing AST">[details]</a></span>
python script for parsing C++ source and printing AST

this is minimal example

template<class Callable>
void call_func(Callable func);

void foo()
{
  call_func([&]() {});
}

libclang10 identifies lambda parameter as CursorKind.LAMBDA_EXPR but it changed
to CursorKind.OBJ_BOOL_LITERAL_EXPR in libclang11 

This is tree dump for 11 version

./print_ast.py
{'ResourceDir': '/usr/lib64/llvm/11/bin/../../../../lib/clang/11.0.0',
'LibDir': '/usr/lib/llvm/11/lib64'}
None:0 0 l.cpp CursorKind.TRANSLATION_UNIT
l.cpp:2 1 l.cpp.call_func CursorKind.FUNCTION_TEMPLATE
l.cpp:1 2 l.cpp.call_func.Callable CursorKind.TEMPLATE_TYPE_PARAMETER
l.cpp:2 2 l.cpp.call_func.func CursorKind.PARM_DECL
l.cpp:2 3 l.cpp.call_func.func.Callable CursorKind.TYPE_REF
l.cpp:4 1 l.cpp.foo CursorKind.FUNCTION_DECL
l.cpp:5 2 l.cpp.foo. CursorKind.COMPOUND_STMT
l.cpp:6 3 l.cpp.foo.. CursorKind.UNEXPOSED_EXPR
l.cpp:6 4 l.cpp.foo...call_func CursorKind.CALL_EXPR
l.cpp:6 5 l.cpp.foo...call_func.call_func CursorKind.UNEXPOSED_EXPR
l.cpp:6 6 l.cpp.foo...call_func.call_func.call_func CursorKind.DECL_REF_EXPR
l.cpp:6 5 l.cpp.foo...call_func. CursorKind.CALL_EXPR
l.cpp:6 6 l.cpp.foo...call_func.. CursorKind.UNEXPOSED_EXPR
l.cpp:6 7 l.cpp.foo...call_func... CursorKind.OBJ_BOOL_LITERAL_EXPR
l.cpp:6 8 l.cpp.foo...call_func.... CursorKind.COMPOUND_STMT


This is for 10 

./print_ast.py  
{'ResourceDir': '/usr/lib64/llvm/10/bin/../../../../lib/clang/10.0.1',
'LibDir': '/usr/lib/llvm/10/lib64'}
None:0 0 l.cpp CursorKind.TRANSLATION_UNIT
l.cpp:2 1 l.cpp.call_func CursorKind.FUNCTION_TEMPLATE
l.cpp:1 2 l.cpp.call_func.Callable CursorKind.TEMPLATE_TYPE_PARAMETER
l.cpp:2 2 l.cpp.call_func.func CursorKind.PARM_DECL
l.cpp:2 3 l.cpp.call_func.func.Callable CursorKind.TYPE_REF
l.cpp:4 1 l.cpp.foo CursorKind.FUNCTION_DECL
l.cpp:5 2 l.cpp.foo. CursorKind.COMPOUND_STMT
l.cpp:6 3 l.cpp.foo.. CursorKind.UNEXPOSED_EXPR
l.cpp:6 4 l.cpp.foo...call_func CursorKind.CALL_EXPR
l.cpp:6 5 l.cpp.foo...call_func.call_func CursorKind.UNEXPOSED_EXPR
l.cpp:6 6 l.cpp.foo...call_func.call_func.call_func CursorKind.DECL_REF_EXPR
l.cpp:6 5 l.cpp.foo...call_func. CursorKind.CALL_EXPR
l.cpp:6 6 l.cpp.foo...call_func.. CursorKind.UNEXPOSED_EXPR
l.cpp:6 7 l.cpp.foo...call_func... CursorKind.LAMBDA_EXPR
l.cpp:6 8 l.cpp.foo...call_func.... CursorKind.COMPOUND_STMT

Notice how child of CALL_EXPR.UNEXPOSED_EXPR is changed in new version. 
There is no way anymore to detect lambda call in AST</pre>
        </div>
      </p>


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