Testing using a 'naked' ISlangFileSystemExt option. (#1026)

1 files changed, 6 insertions, 0 deletions

diff --git a/source/slang/slang-options.cpp b/source/slang/slang-options.cpp
index be88e9d8c..c07ace929 100644
--- a/source/slang/slang-options.cpp
+++ b/source/slang/slang-options.cpp
@@ -786,8 +786,14 @@ struct OptionsParser
                     }
                     else if (name == "load-file")
                     {
+                        // OSFileSystem just implements loadFile interface, so will be wrapped with CacheFileSystem internally
                         spSetFileSystem(compileRequest, OSFileSystem::getSingleton());
                     }
+                    else if (name == "os")
+                    {
+                        // OSFileSystemExt implements the ISlangFileSystemExt interface - and will be used directly
+                        spSetFileSystem(compileRequest, OSFileSystemExt::getSingleton());
+                    }
                     else
                     {
                         sink->diagnose(SourceLoc(), Diagnostics::unknownFileSystemOption, name);