[clang] [clang-tools-extra] [clang] Concepts: support pack expansions for type constraints (PR #132626)

[via cfe-commits]

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@@ -78,6 +78,16 @@ class UnresolvedSetImpl;
 class VarTemplateDecl;
 enum class ImplicitParamKind;
 
+struct AssociatedConstraint {
+  const Expr *ConstraintExpr;
+  int ArgumentPackSubstitutionIndex;
+
+  constexpr AssociatedConstraint(const Expr *ConstraintExpr,
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cor3ntin wrote:

The constexpr doesn't do anything useful for us, and we don't usually make things constexpr if we don't intend to use them at compile time

https://github.com/llvm/llvm-project/pull/132626