================
@@ -89,6 +91,75 @@ class RootSignatureLexer {
}
};
+class RootSignatureParser {
+public:
+ RootSignatureParser(SmallVector<RootElement> &Elements,
+ const SmallVector<RootSignatureToken> &Tokens);
+
+ // Iterates over the provided tokens and constructs the in-memory
+ // representations of the RootElements.
+ //
+ // The return value denotes if there was a failure and the method will
+ // return on the first encountered failure, or, return false if it
+ // can sucessfully reach the end of the tokens.
+ bool Parse();
+
+private:
+ bool ReportError(); // TODO: Implement this to report error through Diags
+
+ // Root Element helpers
+ bool ParseRootElement();
+ bool ParseDescriptorTable();
+ bool ParseDescriptorTableClause();
+
+ // Common parsing helpers
+ bool ParseRegister(Register &Register);
+
+ // Various flags/enum parsing helpers
+ bool ParseDescriptorRangeFlags(DescriptorRangeFlags &Flags);
+ bool ParseShaderVisibility(ShaderVisibility &Flag);
+
+ // Increment the token iterator if we have not reached the end.
+ // Return value denotes if we were already at the last token.
+ bool ConsumeNextToken();
+
+ // Attempt to retrieve the next token, if TokenKind is invalid then there was
+ // no next token.
+ RootSignatureToken PeekNextToken();
+
+ // Is the current token one of the expected kinds
+ bool IsCurExpectedToken(ArrayRef<TokenKind> AnyExpected);
----------------
damyanp wrote:
Any reason this doesn't have an overload that takes a single `Expected` like
all the ones below?
Alternatively, if this one doesn't need the overload then do we need the other
ones?
https://github.com/llvm/llvm-project/pull/122982
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