Add `IGlobalSession::getSessionDescDigest`. (#3669)

* Add `IGlobalSession::getSessionDescDigest`.

* Fix.

1 files changed, 4 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index 8e787ac28..b826707aa 100644
--- a/slang.h
+++ b/slang.h
@@ -3737,6 +3737,10 @@ namespace slang
             */
         virtual SLANG_NO_THROW SlangResult SLANG_MCALL parseCommandLineArguments(
             int argc, const char* const* argv, SessionDesc* outSessionDesc, ISlangUnknown** outAuxAllocation) = 0;
+
+            /** Computes a digest that uniquely identifies the session description.
+            */
+        virtual SLANG_NO_THROW SlangResult SLANG_MCALL getSessionDescDigest(SessionDesc* sessionDesc, ISlangBlob** outBlob) = 0;
     };
 
     #define SLANG_UUID_IGlobalSession IGlobalSession::getTypeGuid()