[llvm] [llvm][ADT] Structured bindings for move-only types in `StringMap` (PR #114676)

[Jakub Kuderski via llvm-commits]

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@@ -147,25 +147,33 @@ class StringMapEntry final : public StringMapEntryStorage<ValueTy> {
 };
 
 // Allow structured bindings on StringMapEntry.
+
+template <std::size_t Index, typename ValueTy>
+decltype(auto) get(StringMapEntry<ValueTy> &E) {
+  static_assert(Index == 0 || Index == 1);
+  if constexpr (Index == 0)
+    return E.getKey();
+  if constexpr (Index == 1)
+    return E.getValue();
+}
+
 template <std::size_t Index, typename ValueTy>
 decltype(auto) get(const StringMapEntry<ValueTy> &E) {
-  static_assert(Index < 2);
+  static_assert(Index == 0 || Index == 1);
   if constexpr (Index == 0)
-    return E.first();
-  else
-    return E.second;
+    return E.getKey();
+  if constexpr (Index == 1)
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kuhar wrote:

also here

https://github.com/llvm/llvm-project/pull/114676