HLSL: Add 'class' keyword as (so far) synonym for 'struct'.

hlsl/hlslGrammar.cpp

@@ -1259,6 +1259,7 @@ bool HlslGrammar::acceptType(TType& type)
         return acceptStructBufferType(type);
         break;
 
+    case EHTokClass:
     case EHTokStruct:
     case EHTokCBuffer:
     case EHTokTBuffer:
@@ -1732,6 +1733,7 @@ bool HlslGrammar::acceptType(TType& type)
 //
 // struct_type
 //      : STRUCT
+//      | CLASS
 //      | CBUFFER
 //      | TBUFFER
 //
@@ -1747,8 +1749,9 @@ bool HlslGrammar::acceptStruct(TType& type)
     // TBUFFER
     else if (acceptTokenClass(EHTokTBuffer))
         storageQualifier = EvqBuffer;
+    // CLASS
     // STRUCT
-    else if (! acceptTokenClass(EHTokStruct))
+    else if (! acceptTokenClass(EHTokClass) && ! acceptTokenClass(EHTokStruct))
         return false;
 
     // IDENTIFIER

hlsl/hlslScanContext.cpp

@@ -327,6 +327,7 @@ void HlslScanContext::fillInKeywordMap()
     (*KeywordMap)["RWStructuredBuffer"] =      EHTokRWStructuredBuffer;
     (*KeywordMap)["StructuredBuffer"] =        EHTokStructuredBuffer;
 
+    (*KeywordMap)["class"] =                   EHTokClass;
     (*KeywordMap)["struct"] =                  EHTokStruct;
     (*KeywordMap)["cbuffer"] =                 EHTokCBuffer;
     (*KeywordMap)["tbuffer"] =                 EHTokTBuffer;
@@ -354,7 +355,6 @@ void HlslScanContext::fillInKeywordMap()
     ReservedSet->insert("auto");
     ReservedSet->insert("catch");
     ReservedSet->insert("char");
-    ReservedSet->insert("class");
     ReservedSet->insert("const_cast");
     ReservedSet->insert("enum");
     ReservedSet->insert("explicit");
@@ -740,6 +740,7 @@ EHlslTokenClass HlslScanContext::tokenizeIdentifier()
         return keyword;
 
     // variable, user type, ...
+    case EHTokClass:
     case EHTokStruct:
     case EHTokTypedef:
     case EHTokCBuffer:

hlsl/hlslTokens.h

@@ -268,6 +268,7 @@ enum EHlslTokenClass {
     // variable, user type, ...
     EHTokIdentifier,
     EHTokTypeName,
+    EHTokClass,
     EHTokStruct,
     EHTokCBuffer,
     EHTokTBuffer,