Added support for a "dry run" option that does not write anything to disk.

src/Generator/Driver.cs

@@ -470,7 +470,9 @@ namespace CppSharp
                 }
             }
 
+            if (!driver.Options.DryRun)
                 driver.WriteCode(outputs);
+
             if (driver.Options.IsCSharpGenerator)
                 driver.CompileCode();
         }

src/Generator/Options.cs

@@ -56,6 +56,14 @@ namespace CppSharp
         public bool ShowHelpText;
         public bool OutputDebug;
 
+        /// <summary>
+        /// Set to true to simulate generating without actually writing
+        /// any output to disk. This can be useful to activate while
+        /// debugging the parser generator so generator bugs do not get
+        /// in the way while iterating.
+        /// </summary>
+        public bool DryRun;
+
         // Parser options
         public List<string> Headers;
         public bool IgnoreParseWarnings;