Move addWriteRange into its own function

ConflictSet.cpp

@@ -1393,35 +1393,10 @@ void destroyTree(Node *root) {
   }
 }
 
-struct __attribute__((visibility("hidden"))) ConflictSet::Impl {
+void addWriteRange(Node *&root, int64_t oldestVersion,
+                   const ConflictSet::WriteRange &w) {
 
-  void check(const ReadRange *reads, Result *result, int count) const {
+  auto *begin = insert(&root, std::span<const uint8_t>(w.begin.p, w.begin.len),
-    Arena arena{64 << 10};
-    for (int i = 0; i < count; ++i) {
-      result[i] =
-          reads[i].readVersion < oldestVersion ? TooOld
-          : (reads[i].end.len > 0
-                 ? checkRangeRead(root,
-                                  std::span<const uint8_t>(reads[i].begin.p,
-                                                           reads[i].begin.len),
-                                  std::span<const uint8_t>(reads[i].end.p,
-                                                           reads[i].end.len),
-                                  reads[i].readVersion)
-                 : checkPointRead(root,
-                                  std::span<const uint8_t>(reads[i].begin.p,
-                                                           reads[i].begin.len),
-                                  reads[i].readVersion))
-              ? Commit
-              : Conflict;
-    }
-  }
-
-  void addWrites(const WriteRange *writes, int count) {
-    for (int i = 0; i < count; ++i) {
-      const auto &w = writes[i];
-      if (w.end.len > 0) {
-        auto *begin =
-            insert(&root, std::span<const uint8_t>(w.begin.p, w.begin.len),
                        w.writeVersion, true);
 
   const bool insertedBegin = !std::exchange(begin->entryPresent, true);
@@ -1466,6 +1441,36 @@ struct __attribute__((visibility("hidden"))) ConflictSet::Impl {
       eraseChild(old->parent, old->parentsIndex);
     }
   }
+}
+
+struct __attribute__((visibility("hidden"))) ConflictSet::Impl {
+
+  void check(const ReadRange *reads, Result *result, int count) const {
+    Arena arena{64 << 10};
+    for (int i = 0; i < count; ++i) {
+      result[i] =
+          reads[i].readVersion < oldestVersion ? TooOld
+          : (reads[i].end.len > 0
+                 ? checkRangeRead(root,
+                                  std::span<const uint8_t>(reads[i].begin.p,
+                                                           reads[i].begin.len),
+                                  std::span<const uint8_t>(reads[i].end.p,
+                                                           reads[i].end.len),
+                                  reads[i].readVersion)
+                 : checkPointRead(root,
+                                  std::span<const uint8_t>(reads[i].begin.p,
+                                                           reads[i].begin.len),
+                                  reads[i].readVersion))
+              ? Commit
+              : Conflict;
+    }
+  }
+
+  void addWrites(const WriteRange *writes, int count) {
+    for (int i = 0; i < count; ++i) {
+      const auto &w = writes[i];
+      if (w.end.len > 0) {
+        addWriteRange(root, oldestVersion, w);
       } else {
         auto *n =
             insert(&root, std::span<const uint8_t>(w.begin.p, w.begin.len),