[clang] [Clang] enhance error recovery with RecoveryExpr for trailing commas in call arguments (PR #114684)

[Younan Zhang via cfe-commits]

================
@@ -3705,6 +3713,12 @@ bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> 
&Exprs,
     Token Comma = Tok;
     ConsumeToken();
     checkPotentialAngleBracketDelimiter(Comma);
+
+    if (Tok.is(tok::r_paren)) {
+      if (HasTrailingComma)
+        *HasTrailingComma = true;
+      break;
+    }
----------------
zyn0217 wrote:

We can't handle the 'r_paren' at the caller side i.e. somewhere in 
ParsePostfixExpressionSuffix()?

https://github.com/llvm/llvm-project/pull/114684
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