Incorrect Doxygen comments generated for certain C functions

Environment

• OS and Version: Windows 11 22H2 (x64)
• VS Code Version: 1.80.2
• C/C++ Extension Version: 1.16.3

Bug Summary and Steps to Reproduce

Bug Summary:

• Auto-generation of Doxygen comments for C functions breaks whenever the return type contains struct, enum or pointer to a forward-declared union.
• Additionally, when a C function is of the form return_type func(void), an extra @param entry is generated.

Steps to reproduce:

1. Create a new C file with the following content:

   struct Bar {};
   union Bar2;
   
   enum Bar3 {
       BAR
   };
   
   typedef struct Bar *BarType;
   
   int *foo(int bar);
   
   struct Bar foo_broken(int bar);
   union Bar2 *foo_broken2(int bar);
   enum Bar3 foo_broken3(int bar);
   
   unsigned long long int foo2(void);
   BarType foo3(int bar);
   
   int foo_broken_param(void);
   

2. Type /// above each function (or just use the context menu) to generate Doxygen comments.
3. Obtain incorrect/truncated Doxygen comments:

   /// @brief 
   /// @param bar 
   /// @return 
   int *foo(int bar);  // correct (normal function)
   
   /// @brief 
   struct Bar foo_broken(int bar);     // truncated
   
   /// @brief 
   union Bar2 *foo_broken2(int bar);   // truncated
   
   /// @brief 
   enum Bar3 foo_broken3(int bar);     // truncated
   
   /// @brief 
   /// @param bar 
   /// @return 
   unsigned long long int foo2(int bar); // correct, despite having multiple tokens in the return type
   
   /// @brief 
   /// @param bar 
   /// @return 
   BarType foo3(int bar);      // correct, because `struct` is not present
   
   /// @brief 
   /// @param  
   /// @return 
   int foo_broken_param(void); // incorrect, an extra unnamed parameter is generated
   

Expected behavior:
Having

/// @brief  
/// @return 

generated for foo_broken_param (which doesn't take any parameters), and

/// @brief 
/// @param  
/// @return 

generated for every other function.

Configuration and Logs

c_cpp_properties.json: (Default Settings)

Other Extensions

No response

Additional context

No response

Start by reproducing the issue in a C file using the declarations and Doxygen-generation steps in the report. Trace the C/C++ extension's Doxygen comment generation for return types containing struct, enum, or forward-declared union, and for functions with void parameters. Done means generated comments omit the parameter for func(void) and preserve the expected @param and @return entries for the other functions.