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| //===-- Iterable.h ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_Iterable_h_
#define liblldb_Iterable_h_
#include <utility>
namespace lldb_private {
template <typename I, typename E> E map_adapter(I &iter) {
return iter->second;
}
template <typename I, typename E> E vector_adapter(I &iter) { return *iter; }
template <typename I, typename E> E list_adapter(I &iter) { return *iter; }
template <typename C, typename E, E (*A)(typename C::const_iterator &)>
class AdaptedConstIterator {
public:
typedef typename C::const_iterator BackingIterator;
// Wrapping constructor
AdaptedConstIterator(BackingIterator backing_iterator)
: m_iter(backing_iterator) {}
// Default-constructible
AdaptedConstIterator() : m_iter() {}
// Copy-constructible
AdaptedConstIterator(const AdaptedConstIterator &rhs) : m_iter(rhs.m_iter) {}
// Copy-assignable
AdaptedConstIterator &operator=(const AdaptedConstIterator &rhs) {
m_iter = rhs.m_iter;
return *this;
}
// Destructible
~AdaptedConstIterator() = default;
// Comparable
bool operator==(const AdaptedConstIterator &rhs) {
return m_iter == rhs.m_iter;
}
bool operator!=(const AdaptedConstIterator &rhs) {
return m_iter != rhs.m_iter;
}
// Rvalue dereferenceable
E operator*() { return (*A)(m_iter); }
E operator->() { return (*A)(m_iter); }
// Offset dereferenceable
E operator[](typename BackingIterator::difference_type offset) {
return AdaptedConstIterator(m_iter + offset);
}
// Incrementable
AdaptedConstIterator &operator++() {
m_iter++;
return *this;
}
// Decrementable
AdaptedConstIterator &operator--() {
m_iter--;
return *this;
}
// Compound assignment
AdaptedConstIterator &
operator+=(typename BackingIterator::difference_type offset) {
m_iter += offset;
return *this;
}
AdaptedConstIterator &
operator-=(typename BackingIterator::difference_type offset) {
m_iter -= offset;
return *this;
}
// Arithmetic
AdaptedConstIterator
operator+(typename BackingIterator::difference_type offset) {
return AdaptedConstIterator(m_iter + offset);
}
AdaptedConstIterator
operator-(typename BackingIterator::difference_type offset) {
return AdaptedConstIterator(m_iter - offset);
}
// Comparable
bool operator<(AdaptedConstIterator &rhs) { return m_iter < rhs.m_iter; }
bool operator<=(AdaptedConstIterator &rhs) { return m_iter <= rhs.m_iter; }
bool operator>(AdaptedConstIterator &rhs) { return m_iter > rhs.m_iter; }
bool operator>=(AdaptedConstIterator &rhs) { return m_iter >= rhs.m_iter; }
template <typename C1, typename E1, E1 (*A1)(typename C1::const_iterator &)>
friend AdaptedConstIterator<C1, E1, A1>
operator+(typename C1::const_iterator::difference_type,
AdaptedConstIterator<C1, E1, A1> &);
template <typename C1, typename E1, E1 (*A1)(typename C1::const_iterator &)>
friend typename C1::const_iterator::difference_type
operator-(AdaptedConstIterator<C1, E1, A1> &,
AdaptedConstIterator<C1, E1, A1> &);
template <typename C1, typename E1, E1 (*A1)(typename C1::const_iterator &)>
friend void swap(AdaptedConstIterator<C1, E1, A1> &,
AdaptedConstIterator<C1, E1, A1> &);
private:
BackingIterator m_iter;
};
template <typename C, typename E, E (*A)(typename C::const_iterator &)>
AdaptedConstIterator<C, E, A> operator+(
typename AdaptedConstIterator<C, E, A>::BackingIterator::difference_type
offset,
AdaptedConstIterator<C, E, A> &rhs) {
return rhs.operator+(offset);
}
template <typename C, typename E, E (*A)(typename C::const_iterator &)>
typename AdaptedConstIterator<C, E, A>::BackingIterator::difference_type
operator-(AdaptedConstIterator<C, E, A> &lhs,
AdaptedConstIterator<C, E, A> &rhs) {
return (lhs.m_iter - rhs.m_iter);
}
template <typename C, typename E, E (*A)(typename C::const_iterator &)>
void swap(AdaptedConstIterator<C, E, A> &lhs,
AdaptedConstIterator<C, E, A> &rhs) {
std::swap(lhs.m_iter, rhs.m_iter);
}
template <typename C, typename E, E (*A)(typename C::const_iterator &)>
class AdaptedIterable {
private:
const C &m_container;
public:
AdaptedIterable(const C &container) : m_container(container) {}
AdaptedConstIterator<C, E, A> begin() {
return AdaptedConstIterator<C, E, A>(m_container.begin());
}
AdaptedConstIterator<C, E, A> end() {
return AdaptedConstIterator<C, E, A>(m_container.end());
}
};
template <typename C, typename E, E (*A)(typename C::const_iterator &),
typename MutexType>
class LockingAdaptedIterable : public AdaptedIterable<C, E, A> {
public:
LockingAdaptedIterable(C &container, MutexType &mutex)
: AdaptedIterable<C, E, A>(container), m_mutex(&mutex) {
m_mutex->lock();
}
LockingAdaptedIterable(LockingAdaptedIterable &&rhs)
: AdaptedIterable<C, E, A>(rhs), m_mutex(rhs.m_mutex) {
rhs.m_mutex = nullptr;
}
~LockingAdaptedIterable() {
if (m_mutex)
m_mutex->unlock();
}
private:
MutexType *m_mutex = nullptr;
LockingAdaptedIterable(const LockingAdaptedIterable &) = delete;
LockingAdaptedIterable &operator=(const LockingAdaptedIterable &) = delete;
};
} // namespace lldb_private
#endif // liblldb_Iterable_h_
|