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Insert/emplace with hint.

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This commit is contained in:
Daniel James
2016-08-17 12:08:15 +01:00
parent e58370b4ff
commit cae72eec2f
8 changed files with 307 additions and 56 deletions
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include/boost/unordered/detail/unique.hpp
+71 -2
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@@ -316,6 +316,14 @@ namespace boost { namespace unordered { namespace detail {
BOOST_ASSERT(false);
return emplace_return(this->begin(), false);
}
iterator emplace_hint(c_iterator,
boost::unordered::detail::emplace_args1<
boost::unordered::detail::please_ignore_this_overload> const&)
{
BOOST_ASSERT(false);
return this->begin();
}
# else
emplace_return emplace(
boost::unordered::detail::please_ignore_this_overload const&)
@@ -323,6 +331,13 @@ namespace boost { namespace unordered { namespace detail {
BOOST_ASSERT(false);
return emplace_return(this->begin(), false);
}
iterator emplace_hint(c_iterator,
boost::unordered::detail::please_ignore_this_overload const&)
{
BOOST_ASSERT(false);
return this->begin();
}
# endif
#endif
@@ -340,6 +355,21 @@ namespace boost { namespace unordered { namespace detail {
#endif
}
template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
iterator emplace_hint(c_iterator hint,
BOOST_UNORDERED_EMPLACE_ARGS)
{
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
return emplace_hint_impl(hint,
extractor::extract(BOOST_UNORDERED_EMPLACE_FORWARD),
BOOST_UNORDERED_EMPLACE_FORWARD);
#else
return emplace_hint_impl(hint,
extractor::extract(args.a0, args.a1),
BOOST_UNORDERED_EMPLACE_FORWARD);
#endif
}
#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <typename A0>
emplace_return emplace(
@@ -347,8 +377,27 @@ namespace boost { namespace unordered { namespace detail {
{
return emplace_impl(extractor::extract(args.a0), args);
}
template <typename A0>
iterator emplace_hint(c_iterator hint,
boost::unordered::detail::emplace_args1<A0> const& args)
{
return emplace_hint_impl(hint, extractor::extract(args.a0), args);
}
#endif
template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
iterator emplace_hint_impl(c_iterator hint, key_type const& k,
BOOST_UNORDERED_EMPLACE_ARGS)
{
if (hint.node_ && this->key_eq()(k, this->get_key(*hint))) {
return iterator(hint.node_);
}
else {
return emplace_impl(k, BOOST_UNORDERED_EMPLACE_FORWARD).first;
}
}
template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
emplace_return emplace_impl(key_type const& k,
BOOST_UNORDERED_EMPLACE_ARGS)
@@ -368,11 +417,31 @@ namespace boost { namespace unordered { namespace detail {
}
}
template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
iterator emplace_hint_impl(c_iterator hint, no_key,
BOOST_UNORDERED_EMPLACE_ARGS)
{
node_tmp b(
boost::unordered::detail::func::construct_value_generic(
this->node_alloc(), BOOST_UNORDERED_EMPLACE_FORWARD),
this->node_alloc());
key_type const& k = this->get_key(b.node_->value());
if (hint.node_ && this->key_eq()(k, this->get_key(*hint))) {
return iterator(hint.node_);
}
std::size_t key_hash = this->hash(k);
iterator pos = this->find_node(key_hash, k);
if (pos.node_) {
return pos;
}
else {
return this->resize_and_add_node(b.release(), key_hash);
}
}
template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
emplace_return emplace_impl(no_key, BOOST_UNORDERED_EMPLACE_ARGS)
{
// Don't have a key, so construct the node first in order
// to be able to lookup the position.
node_tmp b(
boost::unordered::detail::func::construct_value_generic(
this->node_alloc(), BOOST_UNORDERED_EMPLACE_FORWARD),