Fixed the generated code when the C++ parameters are named "arg1", "arg2", etc.

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

src/Generator/Generators/CLI/CLISourcesTemplate.cs

@@ -1160,7 +1160,7 @@ namespace CppSharp.Generators.CLI
             if (param.Type is BuiltinType)
                 return paramMarshal;
 
-            var argName = "arg" + paramIndex.ToString(CultureInfo.InvariantCulture);
+            var argName = Generator.GeneratedIdentifier("arg") + paramIndex.ToString(CultureInfo.InvariantCulture);
 
             var isRef = param.IsOut || param.IsInOut;
             // Since both pointers and references to types are wrapped as CLI

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -2911,7 +2911,7 @@ namespace CppSharp.Generators.CSharp
                 return new ParamMarshal { Name = name, Param = param };
             }
 
-            var argName = "arg" + paramIndex.ToString(CultureInfo.InvariantCulture);
+            var argName = Generator.GeneratedIdentifier("arg") + paramIndex.ToString(CultureInfo.InvariantCulture);
             var paramMarshal = new ParamMarshal { Name = argName, Param = param };
 
             if (param.IsOut || param.IsInOut)

tests/Common/Common.cpp

@@ -80,9 +80,9 @@ Bar* Bar::returnPointerToValueType()
     return this;
 }
 
-bool Bar::operator ==(const Bar& other) const
+bool Bar::operator ==(const Bar& arg1) const
 {
-    return A == other.A && B == other.B;
+    return A == arg1.A && B == arg1.B;
 }
 
 bool operator ==(Bar::Item item, const Bar& bar)

tests/Common/Common.h

@@ -85,7 +85,7 @@ struct DLL_API Bar
 
     Bar* returnPointerToValueType();
 
-    bool operator ==(const Bar& other) const;
+    bool operator ==(const Bar& arg1) const;
 };
 
 DLL_API bool operator ==(Bar::Item item, const Bar& bar);