Support stage_switch. (#6311)

* Support stage_switch.

* Update proposal status.

* Fix gl_InstanceID.

* Fix.

1 files changed, 4 insertions, 1 deletions

diff --git a/source/slang/slang-capability.h b/source/slang/slang-capability.h
index 631cd307a..7c429d825 100644
--- a/source/slang/slang-capability.h
+++ b/source/slang/slang-capability.h
@@ -169,6 +169,9 @@ public:
     /// Return a capability set of 'target' atoms 'this' has, but 'other' does not.
     CapabilitySet getTargetsThisHasButOtherDoesNot(const CapabilitySet& other);
 
+    /// Return a capability set of 'stage' atoms 'this' has, but 'other' does not.
+    CapabilitySet getStagesThisHasButOtherDoesNot(const CapabilitySet& other);
+
     /// Are these two capability sets equal?
     bool operator==(CapabilitySet const& that) const;
 
@@ -359,7 +362,7 @@ void getCapabilityNames(List<UnownedStringSlice>& ioNames);
 UnownedStringSlice capabilityNameToString(CapabilityName name);
 
 bool isDirectChildOfAbstractAtom(CapabilityAtom name);
-
+bool isStageAtom(CapabilityName name, CapabilityName& outCanonicalStage);
 
 /// Return true if `name` represents an atom for a target version, e.g. spirv_1_5.
 bool isTargetVersionAtom(CapabilityAtom name);