76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
|
|
// This file is subject to the license terms in the LICENSE file
|
|
// found in the top-level directory of this distribution.
|
|
|
|
#ifndef CPPAST_CPP_ENTITY_INDEX_HPP_INCLUDED
|
|
#define CPPAST_CPP_ENTITY_INDEX_HPP_INCLUDED
|
|
|
|
#include <map>
|
|
#include <mutex>
|
|
#include <string>
|
|
|
|
#include <type_safe/optional_ref.hpp>
|
|
#include <type_safe/reference.hpp>
|
|
#include <type_safe/strong_typedef.hpp>
|
|
|
|
#include <cppast/detail/assert.hpp>
|
|
|
|
namespace cppast
|
|
{
|
|
class cpp_entity;
|
|
|
|
/// A [ts::strong_typedef]() representing the unique id of a [cppast::cpp_entity]().
|
|
///
|
|
/// It is fully comparable.
|
|
struct cpp_entity_id : type_safe::strong_typedef<cpp_entity_id, std::string>,
|
|
type_safe::strong_typedef_op::equality_comparison<cpp_entity_id, bool>,
|
|
type_safe::strong_typedef_op::relational_comparison<cpp_entity_id, bool>
|
|
{
|
|
using strong_typedef::strong_typedef;
|
|
};
|
|
|
|
inline namespace literals
|
|
{
|
|
/// \returns A new [cppast::cpp_entity_id]() created from the given string.
|
|
inline cpp_entity_id operator""_id(const char* str, std::size_t size)
|
|
{
|
|
return cpp_entity_id(std::string(str, size));
|
|
}
|
|
}
|
|
|
|
/// An index of all [cppast::cpp_entity]() objects created.
|
|
///
|
|
/// It maps [cppast::cpp_entity_id]() to references to the [cppast::cpp_entity]() objects.
|
|
class cpp_entity_index
|
|
{
|
|
public:
|
|
/// \effects Registers a new [cppast::cpp_entity]() also giving its [cppast::cpp_entity_id]().
|
|
/// \requires The entity must not have been registered before,
|
|
/// and it must live as long as the index lives.
|
|
/// \notes This operation is thread safe.
|
|
void register_entity(cpp_entity_id id, type_safe::object_ref<const cpp_entity> entity) const
|
|
{
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
auto result = map_.emplace(std::move(id), std::move(entity));
|
|
DEBUG_ASSERT(result.second, detail::precondition_error_handler{},
|
|
"duplicate index registration");
|
|
}
|
|
|
|
/// \returns A [ts::optional_ref]() corresponding to the entity of the given [cppast::cpp_entity_id]().
|
|
/// \notes This operation is thread safe.
|
|
type_safe::optional_ref<const cpp_entity> lookup(const cpp_entity_id& id) const noexcept
|
|
{
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
auto iter = map_.find(id);
|
|
if (iter == map_.end())
|
|
return {};
|
|
return iter->second.get();
|
|
}
|
|
|
|
private:
|
|
mutable std::mutex mutex_;
|
|
mutable std::map<cpp_entity_id, type_safe::object_ref<const cpp_entity>> map_;
|
|
};
|
|
} // namespace cppast
|
|
|
|
#endif // CPPAST_CPP_ENTITY_INDEX_HPP_INCLUDED
|