[llvm-branch-commits] [clang] [llvm] [HLSL][RootSignature] Implement Parsing of Descriptor Tables (PR #122982)

[Ashley Coleman via llvm-branch-commits]

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@@ -148,6 +148,333 @@ bool RootSignatureLexer::LexToken(RootSignatureToken &Result) {
   return false;
 }
 
+// Parser Definitions
+
+RootSignatureParser::RootSignatureParser(
+    SmallVector<RootElement> &Elements,
+    const SmallVector<RootSignatureToken> &Tokens)
+    : Elements(Elements) {
+  CurTok = Tokens.begin();
+  LastTok = Tokens.end();
+}
+
+bool RootSignatureParser::ReportError() { return true; }
+
+bool RootSignatureParser::Parse() {
+  CurTok--; // Decrement once here so we can use the ...ExpectedToken api
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V-FEXrt wrote:

This is UB right? You are decrementing the `CurTok` out of its actual bounds

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