From 8f29a32a33dfcb2f970bacc27567821152474ac4 Mon Sep 17 00:00:00 2001
From: Christian Mazakas <christian.mazakas@gmail.com>
Date: Thu, 29 Sep 2022 11:18:59 -0700
Subject: [PATCH] Simplify range-based insert() so it doesn't eagerly rehash so
 that insert_tests pass

---
 include/boost/unordered/unordered_flat_map.hpp | 18 +-----------------
 include/boost/unordered/unordered_flat_set.hpp | 18 +-----------------
 2 files changed, 2 insertions(+), 34 deletions(-)

diff --git a/include/boost/unordered/unordered_flat_map.hpp b/include/boost/unordered/unordered_flat_map.hpp
index fa210436..f1f68e71 100644
--- a/include/boost/unordered/unordered_flat_map.hpp
+++ b/include/boost/unordered/unordered_flat_map.hpp
@@ -92,24 +92,8 @@ namespace boost {
         return table_.insert(std::move(value)).first;
       }
 
-      template <class ForwardIterator>
-      typename std::enable_if<
-        std::is_base_of<std::forward_iterator_tag, ForwardIterator>::value,
-        void>::type
-      insert(ForwardIterator first, ForwardIterator last)
-      {
-        auto const len = std::distance(first, last);
-        table_.reserve(len);
-        for (auto pos = first; pos != last; ++pos) {
-          table_.insert(*pos);
-        }
-      }
-
       template <class InputIterator>
-      typename std::enable_if<
-        !std::is_base_of<std::forward_iterator_tag, InputIterator>::value,
-        void>::type
-      insert(InputIterator first, InputIterator last)
+      void insert(InputIterator first, InputIterator last)
       {
         for (auto pos = first; pos != last; ++pos) {
           table_.insert(*pos);
diff --git a/include/boost/unordered/unordered_flat_set.hpp b/include/boost/unordered/unordered_flat_set.hpp
index ced04bfb..e571a5e4 100644
--- a/include/boost/unordered/unordered_flat_set.hpp
+++ b/include/boost/unordered/unordered_flat_set.hpp
@@ -91,24 +91,8 @@ namespace boost {
         return table_.insert(std::move(value)).first;
       }
 
-      template <class ForwardIterator>
-      typename std::enable_if<
-        std::is_base_of<std::forward_iterator_tag, ForwardIterator>::value,
-        void>::type
-      insert(ForwardIterator first, ForwardIterator last)
-      {
-        auto const len = std::distance(first, last);
-        table_.reserve(len);
-        for (auto pos = first; pos != last; ++pos) {
-          table_.insert(*pos);
-        }
-      }
-
       template <class InputIterator>
-      typename std::enable_if<
-        !std::is_base_of<std::forward_iterator_tag, InputIterator>::value,
-        void>::type
-      insert(InputIterator first, InputIterator last)
+      void insert(InputIterator first, InputIterator last)
       {
         for (auto pos = first; pos != last; ++pos) {
           table_.insert(*pos);