non-modifying merge

apache · Oct 21, 2024 · 67da6a9 · 67da6a9
1 parent b338e35
commit 67da6a9
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/tdigest/include/tdigest.hpp b/tdigest/include/tdigest.hpp
@@ -115,7 +115,7 @@ class tdigest {
    * Merge the given t-Digest into this one
    * @param other t-Digest to merge
    */
-  void merge(tdigest& other);
+  void merge(const tdigest& other);
 
   /**
    * Process buffered values and merge centroids if needed

diff --git a/tdigest/include/tdigest_impl.hpp b/tdigest/include/tdigest_impl.hpp
@@ -44,7 +44,7 @@ void tdigest<T, A>::update(T value) {
 }
 
 template<typename T, typename A>
-void tdigest<T, A>::merge(tdigest& other) {
+void tdigest<T, A>::merge(const tdigest& other) {
   if (other.is_empty()) return;
   vector_centroid tmp(buffer_.get_allocator());
   tmp.reserve(buffer_.size() + centroids_.size() + other.buffer_.size() + other.centroids_.size());