================
@@ -162,5 +219,371 @@ std::optional<RootSignatureToken> 
RootSignatureLexer::PeekNextToken() {
   return Result;
 }
 
+// Parser Definitions
+
+RootSignatureParser::RootSignatureParser(SmallVector<RootElement> &Elements,
+                                         RootSignatureLexer &Lexer,
+                                         DiagnosticsEngine &Diags)
+    : Elements(Elements), Lexer(Lexer), Diags(Diags) {}
+
+bool RootSignatureParser::Parse() {
+  // Handle edge-case of empty RootSignature()
----------------
inbelic wrote:

My understanding is that from the perspective of parsing, an empty root 
signature would be valid. Instead an error is raised later when validating the 
structure. Presumably because not all the resources have a binding or so

https://github.com/llvm/llvm-project/pull/122982
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