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Implement try_emplace

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This commit is contained in:
Daniel James
2017-02-27 03:59:02 +00:00
parent 958d206bb6
commit 5f5f8ef1e4
5 changed files with 527 additions and 17 deletions
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include/boost/unordered/detail/implementation.hpp
+87 -16
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@@ -1721,6 +1721,35 @@ construct_node_pair(Alloc& alloc, BOOST_FWD_REF(Key) k, BOOST_FWD_REF(Mapped) m)
BOOST_CATCH_END
return a.release();
}
template <typename Alloc, typename Key, BOOST_UNORDERED_EMPLACE_TEMPLATE>
inline typename boost::unordered::detail::allocator_traits<Alloc>::pointer
construct_node_pair_from_args(
Alloc& alloc, BOOST_FWD_REF(Key) k, BOOST_UNORDERED_EMPLACE_ARGS)
{
node_constructor<Alloc> a(alloc);
a.create_node();
boost::unordered::detail::func::call_construct(
alloc, boost::unordered::detail::func::const_cast_pointer(
boost::addressof(a.node_->value_ptr()->first)),
boost::forward<Key>(k));
BOOST_TRY
{
boost::unordered::detail::func::construct_from_args(
alloc, boost::unordered::detail::func::const_cast_pointer(
boost::addressof(a.node_->value_ptr()->second)),
BOOST_UNORDERED_EMPLACE_FORWARD);
}
BOOST_CATCH(...)
{
boost::unordered::detail::func::call_destroy(
alloc, boost::unordered::detail::func::const_cast_pointer(
boost::addressof(a.node_->value_ptr()->first)));
BOOST_RETHROW;
}
BOOST_CATCH_END
return a.release();
}
}
}
}
@@ -3547,22 +3576,6 @@ struct table_impl : boost::unordered::detail::table<Types>
return this->add_node(b.release(), key_hash);
}
value_type& operator[](const_key_type& k)
{
std::size_t key_hash = this->hash(k);
node_pointer pos = this->find_node(key_hash, k);
if (pos) {
return pos->value();
} else {
return this
->resize_and_add_node(
boost::unordered::detail::func::construct_node_pair(
this->node_alloc(), k),
key_hash)
->value();
}
}
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
emplace_return emplace(boost::unordered::detail::emplace_args1<
@@ -3704,6 +3717,64 @@ struct table_impl : boost::unordered::detail::table<Types>
}
}
template <typename Key>
emplace_return try_emplace_impl(BOOST_FWD_REF(Key) k)
{
std::size_t key_hash = this->hash(k);
node_pointer pos = this->find_node(key_hash, k);
if (pos) {
return emplace_return(iterator(pos), false);
} else {
return emplace_return(
iterator(this->resize_and_add_node(
boost::unordered::detail::func::construct_node_pair(
this->node_alloc(), boost::forward<Key>(k)),
key_hash)),
true);
}
}
template <typename Key>
iterator try_emplace_hint_impl(c_iterator hint, BOOST_FWD_REF(Key) k)
{
if (hint.node_ && this->key_eq()(hint->first, k)) {
return iterator(hint.node_);
} else {
return try_emplace_impl(k).first;
}
}
template <typename Key, BOOST_UNORDERED_EMPLACE_TEMPLATE>
emplace_return try_emplace_impl(
BOOST_FWD_REF(Key) k, BOOST_UNORDERED_EMPLACE_ARGS)
{
std::size_t key_hash = this->hash(k);
node_pointer pos = this->find_node(key_hash, k);
if (pos) {
return emplace_return(iterator(pos), false);
} else {
return emplace_return(
iterator(this->resize_and_add_node(
boost::unordered::detail::func::
construct_node_pair_from_args(this->node_alloc(),
boost::forward<Key>(k),
BOOST_UNORDERED_EMPLACE_FORWARD),
key_hash)),
true);
}
}
template <typename Key, BOOST_UNORDERED_EMPLACE_TEMPLATE>
iterator try_emplace_hint_impl(
c_iterator hint, BOOST_FWD_REF(Key) k, BOOST_UNORDERED_EMPLACE_ARGS)
{
if (hint.node_ && this->key_eq()(hint->first, k)) {
return iterator(hint.node_);
} else {
return try_emplace_impl(k, BOOST_UNORDERED_EMPLACE_FORWARD).first;
}
}
template <typename Key, typename M>
emplace_return insert_or_assign_impl(
BOOST_FWD_REF(Key) k, BOOST_FWD_REF(M) obj)