Fixed anonymous type generation in C mode.

sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs

@@ -2514,6 +2514,20 @@ public sealed partial class PInvokeGenerator : IDisposable
         {
             name = namedDecl.Name.NormalizePath();
 
+            // strip the prefix
+            if (name.StartsWith("enum "))
+            {
+                name = name[5..];
+            }
+            else if (name.StartsWith("struct "))
+            {
+                name = name[7..];
+            }
+            else if (name.StartsWith("union "))
+            {
+                name = name[6..];
+            }
+
             if (namedDecl is CXXConstructorDecl cxxConstructorDecl)
             {
                 var parent = cxxConstructorDecl.Parent;
@@ -2534,7 +2548,8 @@ public sealed partial class PInvokeGenerator : IDisposable
                                  name.StartsWith("(anonymous union at ") ||
                                  name.StartsWith("(unnamed enum at ") ||
                                  name.StartsWith("(unnamed struct at ") ||
-                                 name.StartsWith("(unnamed union at "));
+                                 name.StartsWith("(unnamed union at ") ||
+                                 name.StartsWith("(unnamed at "));
                     Debug.Assert(name.EndsWith(')'));
                 }
 #endif

tests/ClangSharp.PInvokeGenerator.UnitTests/CTest.cs

@@ -79,8 +79,25 @@ typedef struct _MyOtherStruct
     MyStruct _field1;
     MyStruct* _field2;
 } MyOtherStruct;
+
+typedef struct _MyStructWithAnonymousStruct
+{
+    struct {
+        int _field;
+    } _anonymousStructField1;
+} MyStructWithAnonymousStruct;
+
+typedef struct _MyStructWithAnonymousUnion
+{
+    union {
+        int _field1;
+        int* _field2;
+    } union1;
+} MyStructWithAnonymousUnion;
 ";
-        var expectedOutputContents = @"namespace ClangSharp.Test
+        var expectedOutputContents = @"using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
 {
     public partial struct _MyStruct
     {
@@ -95,6 +112,33 @@ typedef struct _MyOtherStruct
         [NativeTypeName(""MyStruct *"")]
         public _MyStruct* _field2;
     }
+
+    public partial struct _MyStructWithAnonymousStruct
+    {
+        [NativeTypeName(""__AnonymousRecord_ClangUnsavedFile_L14_C5"")]
+        public __anonymousStructField1_e__Struct _anonymousStructField1;
+
+        public partial struct __anonymousStructField1_e__Struct
+        {
+            public int _field;
+        }
+    }
+
+    public partial struct _MyStructWithAnonymousUnion
+    {
+        [NativeTypeName(""__AnonymousRecord_ClangUnsavedFile_L21_C5"")]
+        public _union1_e__Union union1;
+
+        [StructLayout(LayoutKind.Explicit)]
+        public unsafe partial struct _union1_e__Union
+        {
+            [FieldOffset(0)]
+            public int _field1;
+
+            [FieldOffset(0)]
+            public int* _field2;
+        }
+    }
 }
 ";
         return ValidateGeneratedCSharpLatestWindowsBindingsAsync(inputContents, expectedOutputContents, commandlineArgs: DefaultCClangCommandLineArgs, language: "c", languageStandard: DefaultCStandard);