diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/container/node_hash_map.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/container/node_hash_map.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/third_party/abseil_cpp/absl/container/node_hash_map.h b/third_party/abseil_cpp/absl/container/node_hash_map.h index 174b971e99ce..7a39f6284cf5 100644 --- a/third_party/abseil_cpp/absl/container/node_hash_map.h +++ b/third_party/abseil_cpp/absl/container/node_hash_map.h @@ -225,7 +225,8 @@ class node_hash_map // // size_type erase(const key_type& key): // - // Erases the element with the matching key, if it exists. + // Erases the element with the matching key, if it exists, returning the + // number of elements erased (0 or 1). using Base::erase; // node_hash_map::insert() @@ -374,6 +375,11 @@ class node_hash_map // key value and returns a node handle owning that extracted data. If the // `node_hash_map` does not contain an element with a matching key, this // function returns an empty node handle. + // + // NOTE: when compiled in an earlier version of C++ than C++17, + // `node_type::key()` returns a const reference to the key instead of a + // mutable reference. We cannot safely return a mutable reference without + // std::launder (which is not available before C++17). using Base::extract; // node_hash_map::merge() |