Merged with upstream repo.

parallel_hashmap/btree.h

@@ -54,25 +54,12 @@
     #pragma warning(disable : 5045) // Compiler will insert Spectre mitigation for memory load if /Qspectre switch specified
 #endif
 
-#include <initializer_list>
-#include <iterator>
-#include <utility>
 
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
 #include <cstdint>
 #include <cstdlib>
 #include <cstring>
-#include <functional>
-#include <iterator>
 #include <limits>
 #include <new>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <initializer_list>
-#include <iterator>
 
 #include "phmap_fwd_decl.h"
 #include "phmap_base.h"

parallel_hashmap/phmap.h

@@ -3434,6 +3434,8 @@ public:
         return modify_if_impl<K, F, Lockable::UniqueLock>(key, std::forward<F>(f));
     }
 
+    
+
     template <class K = key_type, class P = Policy, K* = nullptr>
     MappedReference<P> operator[](key_arg<K>&& key) {
         return Policy::value(&*try_emplace(std::forward<K>(key)).first);