[clang] [llvm] [clang] Add hasAdjSubstatements matcher (PR #169965)

[Yanzuo Liu via llvm-commits]

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@@ -2283,6 +2283,37 @@ using HasOpNameMatcher =
 
 HasOpNameMatcher hasAnyOperatorNameFunc(ArrayRef<const StringRef *> NameRefs);
 
+/// Matches nodes of type T (CompoundStmt or StmtExpr) that contain a sequence
+/// of consecutive substatements matching the provided matchers in order.
+///
+/// See \c hasAdjSubstatements() in ASTMatchers.h for details.
+template <typename T, typename ArgT = std::vector<Matcher<Stmt>>>
+class HasAdjSubstatementsMatcher : public MatcherInterface<T> {
+  static_assert(std::is_same<T, CompoundStmt>::value ||
+                    std::is_same<T, StmtExpr>::value,
+                "Matcher only supports `CompoundStmt` and `StmtExpr`");
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zwuis wrote:

Can we refer to `AST_POLYMORPHIC_MATCHER`?

https://github.com/llvm/llvm-project/pull/169965