================
@@ -169,5 +220,399 @@ bool RootSignatureLexer::LexToken(RootSignatureToken
&Result) {
return false;
}
+// Parser Definitions
+
+RootSignatureParser::RootSignatureParser(
+ SmallVector<RootElement> &Elements,
+ const SmallVector<RootSignatureToken> &Tokens, DiagnosticsEngine &Diags)
+ : Elements(Elements), Diags(Diags) {
+ CurTok = Tokens.begin();
+ LastTok = Tokens.end();
+}
+
+bool RootSignatureParser::Parse() {
+ // Handle edge-case of empty RootSignature()
+ if (CurTok == LastTok)
+ return false;
+
+ bool First = true;
+ // Iterate as many RootElements as possible
+ while (!ParseRootElement(First)) {
+ First = false;
+ // Avoid use of ConsumeNextToken here to skip incorrect end of tokens error
+ CurTok++;
+ if (CurTok == LastTok)
+ return false;
+ if (EnsureExpectedToken(TokenKind::pu_comma))
+ return true;
+ }
+
+ return true;
+}
+
+bool RootSignatureParser::ParseRootElement(bool First) {
+ if (First && EnsureExpectedToken(TokenKind::kw_DescriptorTable))
+ return true;
+ if (!First && ConsumeExpectedToken(TokenKind::kw_DescriptorTable))
+ return true;
+
+ // Dispatch onto the correct parse method
+ switch (CurTok->Kind) {
----------------
inbelic wrote:
This pr only adds support for `DescriptorTable` as a root element. So there is
no added support for a root descriptor range at the moment. A future pr that
will handle the `RootCBV, etc` would be added to this switch statement and then
dispatched onto its own method.
https://github.com/llvm/llvm-project/pull/122982
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