Generate valid C++ for parameters by value

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

src/Generator/Generators/C/CppTypePrinter.cs

@@ -442,7 +442,7 @@ namespace CppSharp.Generators.C
                 }
             }
 
-            return $"{result}";
+            return result;
         }
 
         public override TypePrinterResult VisitDelegate(FunctionType function)

src/Generator/Generators/TypePrinter.cs

@@ -43,7 +43,7 @@ namespace CppSharp.Generators
             if (hasPlaceholder)
                 return string.Format(Type, $"{NamePrefix}{Name}{NameSuffix}");
 
-            var namePrefix = (Name.Length > 0 && NamePrefix.Length > 0) ?
+            var namePrefix = Name.Length > 0 && (NamePrefix.Length > 0 || Type.Length > 0) ?
                 $"{NamePrefix} " : NamePrefix.ToString();
             return $"{Type}{namePrefix}{Name}{NameSuffix}";
         }

tests/Common/Common.h

@@ -486,9 +486,10 @@ namespace SomeNamespace
         virtual void AbstractMethod();
     };
 
-    class DLL_API Inlines
+    class Inlines
     {
     public:
+        Inlines(int param) {}
         inline operator NamespacedAbstractImpl () const { return NamespacedAbstractImpl(); }
     };
 }