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authorGravatar Abseil Team <absl-team@google.com>2020-03-03 11:22:10 -0800
committerGravatar Andy Soffer <asoffer@google.com>2020-03-03 17:32:55 -0500
commitb19ba96766db08b1f32605cb4424a0e7ea0c7584 (patch)
treec4ba295b067b000b9d84410ec81e0095715641a5 /absl/container/internal
parent06f0e767d13d4d68071c4fc51e25724e0fc8bc74 (diff)
Export of internal Abseil changes
-- a3e58c1870a9626039f4d178d2d599319bd9f8a8 by Matt Kulukundis <kfm@google.com>: Allow MakeCordFromExternal to take a zero arg releaser. PiperOrigin-RevId: 298650274 -- 01897c4a9bb99f3dc329a794019498ad345ddebd by Samuel Benzaquen <sbenza@google.com>: Reduce library bloat for absl::Flag by moving the definition of base virtual functions to a .cc file. This removes the duplicate symbols in user translation units and has the side effect of moving the vtable definition too (re key function) PiperOrigin-RevId: 298617920 -- 190f0d3782c63aed01046886d7fbc1be5bca2de9 by Derek Mauro <dmauro@google.com>: Import GitHub #596: Unbreak stacktrace code for UWP apps PiperOrigin-RevId: 298600834 -- cd5cf6f8c87b35b85a9584e94da2a99057345b73 by Gennadiy Rozental <rogeeff@google.com>: Use union of heap allocated pointer, one word atomic and two word atomic to represent flags value. Any type T, which is trivially copy-able and with with sizeof(T) <= 8, will be stored in atomic int64_t. Any type T, which is trivially copy-able and with with 8 < sizeof(T) <= 16, will be stored in atomic AlignedTwoWords. We also introducing value storage type to distinguish these cases. PiperOrigin-RevId: 298497200 -- f8fe7bd53bfed601f002f521e34ab4bc083fc28b by Matthew Brown <matthewbr@google.com>: Ensure a deep copy and proper equality on absl::Status::ErasePayload PiperOrigin-RevId: 298482742 -- a5c9ccddf4b04f444e3f7e27dbc14faf1fcb5373 by Gennadiy Rozental <rogeeff@google.com>: Change ChunkIterator implementation to use fixed capacity collection of CordRep*. We can now assume that depth never exceeds 91. That makes comparison operator exception safe. I've tested that with this CL we do not observe an overhead of chunk_end. Compiler optimized this iterator completely. PiperOrigin-RevId: 298458472 -- 327ea5e8910bc388b03389c730763f9823abfce5 by Abseil Team <absl-team@google.com>: Minor cleanups in b-tree code: - Rename some variables: fix issues of different param names between definition/declaration, move away from `x` as a default meaningless variable name. - Make init_leaf/init_internal be non-static methods (they already take the node as the first parameter). - In internal_emplace/try_shrink, update root/rightmost the same way as in insert_unique/insert_multi. - Replace a TODO with a comment. PiperOrigin-RevId: 298432836 -- 8020ce9ec8558ee712d9733ae3d660ac1d3ffe1a by Abseil Team <absl-team@google.com>: Guard against unnecessary copy in case the buffer is empty. This is important in cases were the user is explicitly tuning their chunks to match PiecewiseChunkSize(). PiperOrigin-RevId: 298366044 -- 89324441d1c0c697c90ba7d8fc63639805fcaa9d by Abseil Team <absl-team@google.com>: Internal change PiperOrigin-RevId: 298219363 GitOrigin-RevId: a3e58c1870a9626039f4d178d2d599319bd9f8a8 Change-Id: I28dffc684b6fd0292b94807b88ec6664d5d0e183
Diffstat (limited to 'absl/container/internal')
-rw-r--r--absl/container/internal/btree.h214
-rw-r--r--absl/container/internal/btree_container.h42
2 files changed, 128 insertions, 128 deletions
diff --git a/absl/container/internal/btree.h b/absl/container/internal/btree.h
index fd5c0e7a..2a5c7314 100644
--- a/absl/container/internal/btree.h
+++ b/absl/container/internal/btree.h
@@ -252,9 +252,9 @@ struct map_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
};
using is_map_container = std::true_type;
- static const Key &key(const value_type &x) { return x.first; }
- static const Key &key(const init_type &x) { return x.first; }
- static const Key &key(const slot_type *x) { return slot_policy::key(x); }
+ static const Key &key(const value_type &value) { return value.first; }
+ static const Key &key(const init_type &init) { return init.first; }
+ static const Key &key(const slot_type *s) { return slot_policy::key(s); }
static mapped_type &value(value_type *value) { return value->second; }
};
@@ -315,8 +315,8 @@ struct set_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
using value_compare = typename set_params::common_params::key_compare;
using is_map_container = std::false_type;
- static const Key &key(const value_type &x) { return x; }
- static const Key &key(const slot_type *x) { return *x; }
+ static const Key &key(const value_type &value) { return value; }
+ static const Key &key(const slot_type *slot) { return *slot; }
};
// An adapter class that converts a lower-bound compare into an upper-bound
@@ -326,8 +326,8 @@ struct set_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
template <typename Compare>
struct upper_bound_adapter {
explicit upper_bound_adapter(const Compare &c) : comp(c) {}
- template <typename K, typename LK>
- bool operator()(const K &a, const LK &b) const {
+ template <typename K1, typename K2>
+ bool operator()(const K1 &a, const K2 &b) const {
// Returns true when a is not greater than b.
return !compare_internal::compare_result_as_less_than(comp(b, a));
}
@@ -736,32 +736,28 @@ class btree_node {
// Merges a node with its right sibling, moving all of the values and the
// delimiting key in the parent node onto itself.
- void merge(btree_node *sibling, allocator_type *alloc);
+ void merge(btree_node *src, allocator_type *alloc);
- // Swap the contents of "this" and "src".
- void swap(btree_node *src, allocator_type *alloc);
+ // Swaps the contents of `this` and `other`.
+ void swap(btree_node *other, allocator_type *alloc);
// Node allocation/deletion routines.
- static btree_node *init_leaf(btree_node *n, btree_node *parent,
- int max_count) {
- n->set_parent(parent);
- n->set_position(0);
- n->set_start(0);
- n->set_finish(0);
- n->set_max_count(max_count);
+ void init_leaf(btree_node *parent, int max_count) {
+ set_parent(parent);
+ set_position(0);
+ set_start(0);
+ set_finish(0);
+ set_max_count(max_count);
absl::container_internal::SanitizerPoisonMemoryRegion(
- n->start_slot(), max_count * sizeof(slot_type));
- return n;
+ start_slot(), max_count * sizeof(slot_type));
}
- static btree_node *init_internal(btree_node *n, btree_node *parent) {
- init_leaf(n, parent, kNodeValues);
+ void init_internal(btree_node *parent) {
+ init_leaf(parent, kNodeValues);
// Set `max_count` to a sentinel value to indicate that this node is
// internal.
- n->set_max_count(kInternalNodeMaxCount);
+ set_max_count(kInternalNodeMaxCount);
absl::container_internal::SanitizerPoisonMemoryRegion(
- &n->mutable_child(n->start()),
- (kNodeValues + 1) * sizeof(btree_node *));
- return n;
+ &mutable_child(start()), (kNodeValues + 1) * sizeof(btree_node *));
}
void destroy(allocator_type *alloc) {
for (int i = start(); i < finish(); ++i) {
@@ -787,13 +783,13 @@ class btree_node {
}
// Move n values starting at value i in this node into the values starting at
- // value j in node x.
+ // value j in dest_node.
void uninitialized_move_n(const size_type n, const size_type i,
- const size_type j, btree_node *x,
+ const size_type j, btree_node *dest_node,
allocator_type *alloc) {
absl::container_internal::SanitizerUnpoisonMemoryRegion(
- x->slot(j), n * sizeof(slot_type));
- for (slot_type *src = slot(i), *end = src + n, *dest = x->slot(j);
+ dest_node->slot(j), n * sizeof(slot_type));
+ for (slot_type *src = slot(i), *end = src + n, *dest = dest_node->slot(j);
src != end; ++src, ++dest) {
params_type::construct(alloc, dest, src);
}
@@ -856,8 +852,8 @@ struct btree_iterator {
std::is_same<btree_iterator<N, R, P>, iterator>::value &&
std::is_same<btree_iterator, const_iterator>::value,
int> = 0>
- btree_iterator(const btree_iterator<N, R, P> &x) // NOLINT
- : node(x.node), position(x.position) {}
+ btree_iterator(const btree_iterator<N, R, P> &other) // NOLINT
+ : node(other.node), position(other.position) {}
private:
// This SFINAE allows explicit conversions from const_iterator to
@@ -869,8 +865,8 @@ struct btree_iterator {
std::is_same<btree_iterator<N, R, P>, const_iterator>::value &&
std::is_same<btree_iterator, iterator>::value,
int> = 0>
- explicit btree_iterator(const btree_iterator<N, R, P> &x)
- : node(const_cast<node_type *>(x.node)), position(x.position) {}
+ explicit btree_iterator(const btree_iterator<N, R, P> &other)
+ : node(const_cast<node_type *>(other.node)), position(other.position) {}
// Increment/decrement the iterator.
void increment() {
@@ -890,11 +886,11 @@ struct btree_iterator {
void decrement_slow();
public:
- bool operator==(const const_iterator &x) const {
- return node == x.node && position == x.position;
+ bool operator==(const const_iterator &other) const {
+ return node == other.node && position == other.position;
}
- bool operator!=(const const_iterator &x) const {
- return node != x.node || position != x.position;
+ bool operator!=(const const_iterator &other) const {
+ return node != other.node || position != other.position;
}
// Accessors for the key/value the iterator is pointing at.
@@ -942,7 +938,8 @@ struct btree_iterator {
// The node in the tree the iterator is pointing at.
Node *node;
// The position within the node of the tree the iterator is pointing at.
- // TODO(ezb): make this a field_type
+ // NOTE: this is an int rather than a field_type because iterators can point
+ // to invalid positions (such as -1) in certain circumstances.
int position;
};
@@ -994,9 +991,9 @@ class btree {
node_stats(size_type l, size_type i) : leaf_nodes(l), internal_nodes(i) {}
- node_stats &operator+=(const node_stats &x) {
- leaf_nodes += x.leaf_nodes;
- internal_nodes += x.internal_nodes;
+ node_stats &operator+=(const node_stats &other) {
+ leaf_nodes += other.leaf_nodes;
+ internal_nodes += other.internal_nodes;
return *this;
}
@@ -1028,15 +1025,15 @@ class btree {
private:
// For use in copy_or_move_values_in_order.
- const value_type &maybe_move_from_iterator(const_iterator x) { return *x; }
- value_type &&maybe_move_from_iterator(iterator x) { return std::move(*x); }
+ const value_type &maybe_move_from_iterator(const_iterator it) { return *it; }
+ value_type &&maybe_move_from_iterator(iterator it) { return std::move(*it); }
// Copies or moves (depending on the template parameter) the values in
- // x into this btree in their order in x. This btree must be empty before this
- // method is called. This method is used in copy construction, copy
- // assignment, and move assignment.
+ // other into this btree in their order in other. This btree must be empty
+ // before this method is called. This method is used in copy construction,
+ // copy assignment, and move assignment.
template <typename Btree>
- void copy_or_move_values_in_order(Btree *x);
+ void copy_or_move_values_in_order(Btree *other);
// Validates that various assumptions/requirements are true at compile time.
constexpr static bool static_assert_validation();
@@ -1044,12 +1041,12 @@ class btree {
public:
btree(const key_compare &comp, const allocator_type &alloc);
- btree(const btree &x);
- btree(btree &&x) noexcept
- : root_(std::move(x.root_)),
- rightmost_(absl::exchange(x.rightmost_, EmptyNode())),
- size_(absl::exchange(x.size_, 0)) {
- x.mutable_root() = EmptyNode();
+ btree(const btree &other);
+ btree(btree &&other) noexcept
+ : root_(std::move(other.root_)),
+ rightmost_(absl::exchange(other.rightmost_, EmptyNode())),
+ size_(absl::exchange(other.size_, 0)) {
+ other.mutable_root() = EmptyNode();
}
~btree() {
@@ -1059,9 +1056,9 @@ class btree {
clear();
}
- // Assign the contents of x to *this.
- btree &operator=(const btree &x);
- btree &operator=(btree &&x) noexcept;
+ // Assign the contents of other to *this.
+ btree &operator=(const btree &other);
+ btree &operator=(btree &&other) noexcept;
iterator begin() { return iterator(leftmost()); }
const_iterator begin() const { return const_iterator(leftmost()); }
@@ -1204,15 +1201,15 @@ class btree {
// Clear the btree, deleting all of the values it contains.
void clear();
- // Swap the contents of *this and x.
- void swap(btree &x);
+ // Swaps the contents of `this` and `other`.
+ void swap(btree &other);
const key_compare &key_comp() const noexcept {
return root_.template get<0>();
}
- template <typename K, typename LK>
- bool compare_keys(const K &x, const LK &y) const {
- return compare_internal::compare_result_as_less_than(key_comp()(x, y));
+ template <typename K1, typename K2>
+ bool compare_keys(const K1 &a, const K2 &b) const {
+ return compare_internal::compare_result_as_less_than(key_comp()(a, b));
}
value_compare value_comp() const { return value_compare(key_comp()); }
@@ -1322,16 +1319,19 @@ class btree {
// Node creation/deletion routines.
node_type *new_internal_node(node_type *parent) {
- node_type *p = allocate(node_type::InternalSize());
- return node_type::init_internal(p, parent);
+ node_type *n = allocate(node_type::InternalSize());
+ n->init_internal(parent);
+ return n;
}
node_type *new_leaf_node(node_type *parent) {
- node_type *p = allocate(node_type::LeafSize());
- return node_type::init_leaf(p, parent, kNodeValues);
+ node_type *n = allocate(node_type::LeafSize());
+ n->init_leaf(parent, kNodeValues);
+ return n;
}
node_type *new_leaf_root_node(const int max_count) {
- node_type *p = allocate(node_type::LeafSize(max_count));
- return node_type::init_leaf(p, p, max_count);
+ node_type *n = allocate(node_type::LeafSize(max_count));
+ n->init_leaf(/*parent=*/n, max_count);
+ return n;
}
// Deletion helper routines.
@@ -1715,12 +1715,12 @@ void btree_node<P>::merge(btree_node *src, allocator_type *alloc) {
}
template <typename P>
-void btree_node<P>::swap(btree_node *x, allocator_type *alloc) {
+void btree_node<P>::swap(btree_node *other, allocator_type *alloc) {
using std::swap;
- assert(leaf() == x->leaf());
+ assert(leaf() == other->leaf());
// Determine which is the smaller/larger node.
- btree_node *smaller = this, *larger = x;
+ btree_node *smaller = this, *larger = other;
if (smaller->count() > larger->count()) {
swap(smaller, larger);
}
@@ -1759,7 +1759,7 @@ void btree_node<P>::swap(btree_node *x, allocator_type *alloc) {
// Swap the `finish`s.
// TODO(ezb): with floating storage, will also need to swap starts.
- swap(mutable_finish(), x->mutable_finish());
+ swap(mutable_finish(), other->mutable_finish());
}
////
@@ -1814,7 +1814,7 @@ void btree_iterator<N, R, P>::decrement_slow() {
// btree methods
template <typename P>
template <typename Btree>
-void btree<P>::copy_or_move_values_in_order(Btree *x) {
+void btree<P>::copy_or_move_values_in_order(Btree *other) {
static_assert(std::is_same<btree, Btree>::value ||
std::is_same<const btree, Btree>::value,
"Btree type must be same or const.");
@@ -1822,11 +1822,11 @@ void btree<P>::copy_or_move_values_in_order(Btree *x) {
// We can avoid key comparisons because we know the order of the
// values is the same order we'll store them in.
- auto iter = x->begin();
- if (iter == x->end()) return;
+ auto iter = other->begin();
+ if (iter == other->end()) return;
insert_multi(maybe_move_from_iterator(iter));
++iter;
- for (; iter != x->end(); ++iter) {
+ for (; iter != other->end(); ++iter) {
// If the btree is not empty, we can just insert the new value at the end
// of the tree.
internal_emplace(end(), maybe_move_from_iterator(iter));
@@ -1869,8 +1869,9 @@ btree<P>::btree(const key_compare &comp, const allocator_type &alloc)
: root_(comp, alloc, EmptyNode()), rightmost_(EmptyNode()), size_(0) {}
template <typename P>
-btree<P>::btree(const btree &x) : btree(x.key_comp(), x.allocator()) {
- copy_or_move_values_in_order(&x);
+btree<P>::btree(const btree &other)
+ : btree(other.key_comp(), other.allocator()) {
+ copy_or_move_values_in_order(&other);
}
template <typename P>
@@ -1977,46 +1978,47 @@ void btree<P>::insert_iterator_multi(InputIterator b, InputIterator e) {
}
template <typename P>
-auto btree<P>::operator=(const btree &x) -> btree & {
- if (this != &x) {
+auto btree<P>::operator=(const btree &other) -> btree & {
+ if (this != &other) {
clear();
- *mutable_key_comp() = x.key_comp();
+ *mutable_key_comp() = other.key_comp();
if (absl::allocator_traits<
allocator_type>::propagate_on_container_copy_assignment::value) {
- *mutable_allocator() = x.allocator();
+ *mutable_allocator() = other.allocator();
}
- copy_or_move_values_in_order(&x);
+ copy_or_move_values_in_order(&other);
}
return *this;
}
template <typename P>
-auto btree<P>::operator=(btree &&x) noexcept -> btree & {
- if (this != &x) {
+auto btree<P>::operator=(btree &&other) noexcept -> btree & {
+ if (this != &other) {
clear();
using std::swap;
if (absl::allocator_traits<
allocator_type>::propagate_on_container_copy_assignment::value) {
// Note: `root_` also contains the allocator and the key comparator.
- swap(root_, x.root_);
- swap(rightmost_, x.rightmost_);
- swap(size_, x.size_);
+ swap(root_, other.root_);
+ swap(rightmost_, other.rightmost_);
+ swap(size_, other.size_);
} else {
- if (allocator() == x.allocator()) {
- swap(mutable_root(), x.mutable_root());
- swap(*mutable_key_comp(), *x.mutable_key_comp());
- swap(rightmost_, x.rightmost_);
- swap(size_, x.size_);
+ if (allocator() == other.allocator()) {
+ swap(mutable_root(), other.mutable_root());
+ swap(*mutable_key_comp(), *other.mutable_key_comp());
+ swap(rightmost_, other.rightmost_);
+ swap(size_, other.size_);
} else {
// We aren't allowed to propagate the allocator and the allocator is
// different so we can't take over its memory. We must move each element
- // individually. We need both `x` and `this` to have `x`s key comparator
- // while moving the values so we can't swap the key comparators.
- *mutable_key_comp() = x.key_comp();
- copy_or_move_values_in_order(&x);
+ // individually. We need both `other` and `this` to have `other`s key
+ // comparator while moving the values so we can't swap the key
+ // comparators.
+ *mutable_key_comp() = other.key_comp();
+ copy_or_move_values_in_order(&other);
}
}
}
@@ -2215,20 +2217,20 @@ void btree<P>::clear() {
}
template <typename P>
-void btree<P>::swap(btree &x) {
+void btree<P>::swap(btree &other) {
using std::swap;
if (absl::allocator_traits<
allocator_type>::propagate_on_container_swap::value) {
// Note: `root_` also contains the allocator and the key comparator.
- swap(root_, x.root_);
+ swap(root_, other.root_);
} else {
// It's undefined behavior if the allocators are unequal here.
- assert(allocator() == x.allocator());
- swap(mutable_root(), x.mutable_root());
- swap(*mutable_key_comp(), *x.mutable_key_comp());
+ assert(allocator() == other.allocator());
+ swap(mutable_root(), other.mutable_root());
+ swap(*mutable_key_comp(), *other.mutable_key_comp());
}
- swap(rightmost_, x.rightmost_);
- swap(size_, x.size_);
+ swap(rightmost_, other.rightmost_);
+ swap(size_, other.size_);
}
template <typename P>
@@ -2417,8 +2419,7 @@ void btree<P>::try_shrink() {
if (root()->leaf()) {
assert(size() == 0);
delete_leaf_node(root());
- mutable_root() = EmptyNode();
- rightmost_ = EmptyNode();
+ mutable_root() = rightmost_ = EmptyNode();
} else {
node_type *child = root()->start_child();
child->make_root();
@@ -2463,8 +2464,7 @@ inline auto btree<P>::internal_emplace(iterator iter, Args &&... args)
new_leaf_root_node((std::min<int>)(kNodeValues, 2 * max_count));
iter.node->swap(root(), mutable_allocator());
delete_leaf_node(root());
- mutable_root() = iter.node;
- rightmost_ = iter.node;
+ mutable_root() = rightmost_ = iter.node;
} else {
rebalance_or_split(&iter);
}
diff --git a/absl/container/internal/btree_container.h b/absl/container/internal/btree_container.h
index f2e4c3a5..734c90ef 100644
--- a/absl/container/internal/btree_container.h
+++ b/absl/container/internal/btree_container.h
@@ -68,10 +68,10 @@ class btree_container {
explicit btree_container(const key_compare &comp,
const allocator_type &alloc = allocator_type())
: tree_(comp, alloc) {}
- btree_container(const btree_container &x) = default;
- btree_container(btree_container &&x) noexcept = default;
- btree_container &operator=(const btree_container &x) = default;
- btree_container &operator=(btree_container &&x) noexcept(
+ btree_container(const btree_container &other) = default;
+ btree_container(btree_container &&other) noexcept = default;
+ btree_container &operator=(const btree_container &other) = default;
+ btree_container &operator=(btree_container &&other) noexcept(
std::is_nothrow_move_assignable<Tree>::value) = default;
// Iterator routines.
@@ -154,7 +154,7 @@ class btree_container {
public:
// Utility routines.
void clear() { tree_.clear(); }
- void swap(btree_container &x) { tree_.swap(x.tree_); }
+ void swap(btree_container &other) { tree_.swap(other.tree_); }
void verify() const { tree_.verify(); }
// Size routines.
@@ -257,26 +257,26 @@ class btree_set_container : public btree_container<Tree> {
}
// Insertion routines.
- std::pair<iterator, bool> insert(const value_type &x) {
- return this->tree_.insert_unique(params_type::key(x), x);
+ std::pair<iterator, bool> insert(const value_type &v) {
+ return this->tree_.insert_unique(params_type::key(v), v);
}
- std::pair<iterator, bool> insert(value_type &&x) {
- return this->tree_.insert_unique(params_type::key(x), std::move(x));
+ std::pair<iterator, bool> insert(value_type &&v) {
+ return this->tree_.insert_unique(params_type::key(v), std::move(v));
}
template <typename... Args>
std::pair<iterator, bool> emplace(Args &&... args) {
init_type v(std::forward<Args>(args)...);
return this->tree_.insert_unique(params_type::key(v), std::move(v));
}
- iterator insert(const_iterator position, const value_type &x) {
+ iterator insert(const_iterator position, const value_type &v) {
return this->tree_
- .insert_hint_unique(iterator(position), params_type::key(x), x)
+ .insert_hint_unique(iterator(position), params_type::key(v), v)
.first;
}
- iterator insert(const_iterator position, value_type &&x) {
+ iterator insert(const_iterator position, value_type &&v) {
return this->tree_
- .insert_hint_unique(iterator(position), params_type::key(x),
- std::move(x))
+ .insert_hint_unique(iterator(position), params_type::key(v),
+ std::move(v))
.first;
}
template <typename... Args>
@@ -562,15 +562,15 @@ class btree_multiset_container : public btree_container<Tree> {
}
// Insertion routines.
- iterator insert(const value_type &x) { return this->tree_.insert_multi(x); }
- iterator insert(value_type &&x) {
- return this->tree_.insert_multi(std::move(x));
+ iterator insert(const value_type &v) { return this->tree_.insert_multi(v); }
+ iterator insert(value_type &&v) {
+ return this->tree_.insert_multi(std::move(v));
}
- iterator insert(const_iterator position, const value_type &x) {
- return this->tree_.insert_hint_multi(iterator(position), x);
+ iterator insert(const_iterator position, const value_type &v) {
+ return this->tree_.insert_hint_multi(iterator(position), v);
}
- iterator insert(const_iterator position, value_type &&x) {
- return this->tree_.insert_hint_multi(iterator(position), std::move(x));
+ iterator insert(const_iterator position, value_type &&v) {
+ return this->tree_.insert_hint_multi(iterator(position), std::move(v));
}
template <typename InputIterator>
void insert(InputIterator b, InputIterator e) {