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

[Younan Zhang via cfe-commits]

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@@ -961,6 +961,7 @@ static const Expr *SubstituteConstraintExpressionWithoutSatisfaction(
 
   if (MLTAL.getNumSubstitutedLevels() == 0)
     return ConstrExpr;
+  MLTAL.setKind(TemplateSubstitutionKind::Rewrite);
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zyn0217 wrote:

I presume this avoids creating Subst* nodes for the substitution, right?
Could you explain what we would gain from / the difference it makes this way?

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