[clang] [clang-tools-extra] [llvm] [clang] WIP: Improved Context Declaration tracking (PR #107942)

[Younan Zhang via cfe-commits]

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@@ -6291,7 +6307,8 @@ bool Parser::isDeclarationSpecifier(
 bool Parser::isConstructorDeclarator(bool IsUnqualified, bool DeductionGuide,
                                      DeclSpec::FriendSpecified IsFriend,
                                      const ParsedTemplateInfo *TemplateInfo) {
-  RevertingTentativeParsingAction TPA(*this);
+  RevertingTentativeParsingAction TPA(*this, /*Unannotated=*/true);
+  Sema::SFINAETrap Trap(Actions);
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zyn0217 wrote:

Why do we need a SFINAETrap here?

https://github.com/llvm/llvm-project/pull/107942