Make interface types non c-style in Slang2026. (#7260)

* Make interface types non c-style.

* Make Optional<T> work with autodiff and existential types.

* Fix.

* patch behind slang 2026.

* Fix warnings.

* cleanup.

* Fix tests.

* Fix.

* Fix com interface lowering.

* Add comment to test.

* regenerate command line reference

* Add test for passing `none` to autodiff function.

* Fix recording of `getDynamicObjectRTTIBytes`.

* Fix nested Optional types.

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/source/core/slang-string-escape-util.cpp b/source/core/slang-string-escape-util.cpp
index 0645d94ba..c079b8b39 100644
--- a/source/core/slang-string-escape-util.cpp
+++ b/source/core/slang-string-escape-util.cpp
@@ -1099,6 +1099,22 @@ StringEscapeUtil::Handler* StringEscapeUtil::getHandler(Style style)
     }
 }
 
+/* static */ UnownedStringSlice StringEscapeUtil::maybeUnquoteCommandLineArg(
+    UnownedStringSlice slice)
+{
+    // If the slice is quoted, unquote it, else return as is
+    if (slice.startsWith("\'") || slice.startsWith("\""))
+    {
+        const Index len = slice.getLength();
+        if (len >= 2 && slice[len - 1] == slice[0])
+        {
+            // Unquote it
+            return UnownedStringSlice(slice.begin() + 1, len - 2);
+        }
+    }
+    return slice;
+}
+
 /* static */ bool StringEscapeUtil::isQuoted(char quoteChar, UnownedStringSlice& slice)
 {
     const Index len = slice.getLength();