Resolve overloads with typedef-ed mapped params

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/Generator/Passes/CheckAmbiguousFunctions.cs

@@ -80,15 +80,17 @@ namespace CppSharp.Passes
             var i = 0;
             for (; i < commonParameters; ++i)
             {
-                AST.Type funcType = functionParams[i].Type.GetMappedType(
+                AST.Type funcOriginalType = functionParams[i].Type.Desugar();
+                AST.Type funcType = funcOriginalType.GetMappedType(
                     TypeMaps, Options.GeneratorKind);
-                AST.Type overloadType = overloadParams[i].Type.GetMappedType(
+                AST.Type overloadOriginalType = overloadParams[i].Type.Desugar();
+                AST.Type overloadType = overloadOriginalType.GetMappedType(
                     TypeMaps, Options.GeneratorKind);
 
-                if (!funcType.Equals(functionParams[i].Type.Desugar()))
+                if (!funcType.Equals(funcOriginalType))
                     functionMappedParams++;
 
-                if (!overloadType.Equals(overloadParams[i].Type.Desugar()))
+                if (!overloadType.Equals(overloadOriginalType))
                     overloadMappedParams++;
 
                 AST.Type funcPointee = funcType.GetFinalPointee() ?? funcType;

tests/CSharp/CSharp.Tests.cs

@@ -86,6 +86,7 @@ public unsafe class CSharpTests
         }
 
         CSharp.CSharp.FunctionInsideInlineNamespace();
+        CSharp.CSharp.TakeMappedEnum(TestFlag.Flag1);
         using (CSharpTemplates.SpecialiseReturnOnly())
         {
         }

tests/CSharp/CSharp.cpp

@@ -1860,6 +1860,14 @@ const Foo*& takeReturnReferenceToPointer(const Foo*& foo)
     return foo;
 }
 
+void takeMappedEnum(TestFlag value)
+{
+}
+
+void takeMappedEnum(TestFlags value)
+{
+}
+
 boolean_t takeTypemapTypedefParam(boolean_t b)
 {
     return b;
@@ -1931,4 +1939,4 @@ const unsigned StructWithEmbeddedArrayOfStructObjectAlignmentOffsets[2]
 {
     offsetof(StructWithEmbeddedArrayOfStructObjectAlignment, boolean),
     offsetof(StructWithEmbeddedArrayOfStructObjectAlignment, embedded_struct),
-};
+};

tests/CSharp/CSharp.h

@@ -1442,6 +1442,9 @@ DLL_API char* takeConstCharRef(const char& c);
 DLL_API const char*& takeConstCharStarRef(const char*& c);
 DLL_API const void*& rValueReferenceToPointer(void*&& v);
 DLL_API const Foo*& takeReturnReferenceToPointer(const Foo*& foo);
+typedef QFlags<TestFlag> TestFlags;
+DLL_API void takeMappedEnum(TestFlag value);
+DLL_API void takeMappedEnum(TestFlags value);
 
 struct {
     struct {