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Implement heterogeneous equal_range() for unordered_map

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LeonineKing1199
2021-12-01 09:39:07 -08:00
parent 6249660e1f
commit 13f40e4333
2 changed files with 179 additions and 0 deletions
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28
include/boost/unordered/unordered_map.hpp
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@@ -799,6 +799,34 @@ namespace boost {
std::pair<const_iterator, const_iterator> equal_range(
const key_type&) const;
template <class Key>
typename boost::enable_if_c<detail::is_transparent<Key, H>::value &&
detail::is_transparent<Key, P>::value,
std::pair<iterator, iterator> >::type
equal_range(const Key& key)
{
node_pointer p = table_.find_node_impl(
table::policy::apply_hash(this->hash_function(), key), key,
this->key_eq());
return std::make_pair(
iterator(p), iterator(p ? table::next_node(p) : p));
}
template <class Key>
typename boost::enable_if_c<detail::is_transparent<Key, H>::value &&
detail::is_transparent<Key, P>::value,
std::pair<const_iterator, const_iterator> >::type
equal_range(const Key& key) const
{
node_pointer p = table_.find_node_impl(
table::policy::apply_hash(this->hash_function(), key), key,
this->key_eq());
return std::make_pair(
const_iterator(p), const_iterator(p ? table::next_node(p) : p));
}
mapped_type& operator[](const key_type&);
mapped_type& operator[](BOOST_RV_REF(key_type));
mapped_type& at(const key_type&);