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externals: Add robin-map

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Merge commit '8bf66a678af746fce336851a8ddf8fa08d358a20' as 'externals/robin-map'
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MerryMage 2020-05-26 20:51:11 +01:00
commit 91578edc69
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comment: off
coverage:
status:
project: off
patch: off

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language: cpp
dist: trusty
matrix:
include:
- os: linux
compiler: clang
env:
- CBUILD_TYPE="Release"
- os: linux
compiler: gcc
env:
- CBUILD_TYPE="Release"
- os: osx
compiler: clang
env:
- CBUILD_TYPE="Release"
- os: osx
compiler: gcc
env:
- CBUILD_TYPE="Release"
- os: linux
compiler: clang
dist: xenial
env:
- CBUILD_TYPE="Release"
- CXXFLAGS="-fsanitize=address,undefined"
- os: linux
compiler: gcc
env:
- TYPE="coverage"
- CXXFLAGS="--coverage"
- os: linux
compiler: gcc
env:
- CBUILD_TYPE="Release"
- CXXFLAGS="-fno-exceptions"
addons:
apt:
packages:
- libboost-test-dev
- lcov
script:
- cd tests
- mkdir build
- cd build
- cmake -DCMAKE_BUILD_TYPE="$CBUILD_TYPE" ..
- VERBOSE=1 make
- ./tsl_robin_map_tests
after_success:
- if [[ "$TYPE" == "coverage" ]]; then lcov -c -b ../../include/ -d . -o coverage.info --no-external && bash <(curl -s https://codecov.io/bash) -f coverage.info; fi

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cmake_minimum_required(VERSION 3.1)
include(GNUInstallDirs)
project(tsl-robin-map VERSION 0.6.2)
add_library(robin_map INTERFACE)
# Use tsl::robin_map as target, more consistent with other libraries conventions (Boost, Qt, ...)
add_library(tsl::robin_map ALIAS robin_map)
target_include_directories(robin_map INTERFACE
"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
"$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
list(APPEND headers "${CMAKE_CURRENT_SOURCE_DIR}/include/tsl/robin_growth_policy.h"
"${CMAKE_CURRENT_SOURCE_DIR}/include/tsl/robin_hash.h"
"${CMAKE_CURRENT_SOURCE_DIR}/include/tsl/robin_map.h"
"${CMAKE_CURRENT_SOURCE_DIR}/include/tsl/robin_set.h")
target_sources(robin_map INTERFACE "$<BUILD_INTERFACE:${headers}>")
if(MSVC)
target_sources(robin_map INTERFACE
"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/tsl-robin-map.natvis>"
"$<INSTALL_INTERFACE:${CMAKE_INSTALL_DATAROOTDIR}/tsl-robin-map.natvis>")
endif()
# Installation (only compatible with CMake version >= 3.3)
if(${CMAKE_VERSION} VERSION_GREATER "3.2")
include(CMakePackageConfigHelpers)
## Install include directory and potential natvis file
install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/tsl"
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
if(MSVC)
install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/tsl-robin-map.natvis"
DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}")
endif()
## Create and install tsl-robin-mapConfig.cmake
configure_package_config_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/tsl-robin-mapConfig.cmake.in"
"${CMAKE_CURRENT_BINARY_DIR}/tsl-robin-mapConfig.cmake"
INSTALL_DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/cmake/tsl-robin-map")
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/tsl-robin-mapConfig.cmake"
DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/cmake/tsl-robin-map")
## Create and install tsl-robin-mapTargets.cmake
install(TARGETS robin_map
EXPORT tsl-robin-mapTargets)
install(EXPORT tsl-robin-mapTargets
NAMESPACE tsl::
DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/cmake/tsl-robin-map")
## Create and install tsl-robin-mapConfigVersion.cmake
# tsl-robin-map is header-only and does not depend on the architecture.
# Remove CMAKE_SIZEOF_VOID_P from tsl-robin-mapConfigVersion.cmake so that a
# tsl-robin-mapConfig.cmake generated for a 64 bit target can be used for 32 bit
# targets and vice versa.
set(CMAKE_SIZEOF_VOID_P_BACKUP ${CMAKE_SIZEOF_VOID_P})
unset(CMAKE_SIZEOF_VOID_P)
write_basic_package_version_file("${CMAKE_CURRENT_BINARY_DIR}/tsl-robin-mapConfigVersion.cmake"
COMPATIBILITY SameMajorVersion)
set(CMAKE_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P_BACKUP})
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/tsl-robin-mapConfigVersion.cmake"
DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/cmake/tsl-robin-map")
endif()

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MIT License
Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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[![Build Status](https://travis-ci.org/Tessil/robin-map.svg?branch=master)](https://travis-ci.org/Tessil/robin-map) [![Build status](https://ci.appveyor.com/api/projects/status/lo79n4ya4nta79q4/branch/master?svg=true)](https://ci.appveyor.com/project/Tessil/robin-map/branch/master)
## A C++ implementation of a fast hash map and hash set using robin hood hashing
The robin-map library is a C++ implementation of a fast hash map and hash set using open-addressing and linear robin hood hashing with backward shift deletion to resolve collisions.
Four classes are provided: `tsl::robin_map`, `tsl::robin_set`, `tsl::robin_pg_map` and `tsl::robin_pg_set`. The first two are faster and use a power of two growth policy, the last two use a prime growth policy instead and are able to cope better with a poor hash function. Use the prime version if there is a chance of repeating patterns in the lower bits of your hash (e.g. you are storing pointers with an identity hash function). See [GrowthPolicy](#growth-policy) for details.
A **benchmark** of `tsl::robin_map` against other hash maps may be found [here](https://tessil.github.io/2016/08/29/benchmark-hopscotch-map.html). This page also gives some advices on which hash table structure you should try for your use case (useful if you are a bit lost with the multiple hash tables implementations in the `tsl` namespace).
### Key features
- Header-only library, just add the [include](include/) directory to your include path and you are ready to go. If you use CMake, you can also use the `tsl::robin_map` exported target from the [CMakeLists.txt](CMakeLists.txt).
- Fast hash table, check the [benchmark](https://tessil.github.io/2016/08/29/benchmark-hopscotch-map.html) for some numbers.
- Support for move-only and non-default constructible key/value.
- Support for heterogeneous lookups allowing the usage of `find` with a type different than `Key` (e.g. if you have a map that uses `std::unique_ptr<foo>` as key, you can use a `foo*` or a `std::uintptr_t` as key parameter to `find` without constructing a `std::unique_ptr<foo>`, see [example](#heterogeneous-lookups)).
- No need to reserve any sentinel value from the keys.
- Possibility to store the hash value alongside the stored key-value for faster rehash and lookup if the hash or the key equal functions are expensive to compute. Note that hash may be stored even if not asked explicitly when the library can detect that it will have no impact on the size of the structure in memory due to alignment. See the [StoreHash](https://tessil.github.io/robin-map/classtsl_1_1robin__map.html#details) template parameter for details.
- If the hash is known before a lookup, it is possible to pass it as parameter to speed-up the lookup (see `precalculated_hash` parameter in [API](https://tessil.github.io/robin-map/classtsl_1_1robin__map.html#a35021b11aabb61820236692a54b3a0f8)).
- The library can be used with exceptions disabled (through `-fno-exceptions` option on Clang and GCC, without an `/EH` option on MSVC or simply by defining `TSL_NO_EXCEPTIONS`). `std::terminate` is used in replacement of the `throw` instruction when exceptions are disabled.
- API closely similar to `std::unordered_map` and `std::unordered_set`.
### Differences compared to `std::unordered_map`
`tsl::robin_map` tries to have an interface similar to `std::unordered_map`, but some differences exist.
- The **strong exception guarantee only holds** if the following statement is true `std::is_nothrow_swappable<value_type>::value && std::is_nothrow_move_constructible<value_type>::value` (where `value_type` is `Key` for `tsl::robin_set` and `std::pair<Key, T>` for `tsl::robin_map`). Otherwise if an exception is thrown during the swap or the move, the structure may end up in a undefined state. Note that per the standard, a `value_type` with a noexcept copy constructor and no move constructor also satisfies this condition and will thus guarantee the strong exception guarantee for the structure (see [API](https://tessil.github.io/robin-map/classtsl_1_1robin__map.html#details) for details).
- The type `Key`, and also `T` in case of map, must be swappable. They must also be copy and/or move constructible.
- Iterator invalidation doesn't behave in the same way, any operation modifying the hash table invalidate them (see [API](https://tessil.github.io/robin-map/classtsl_1_1robin__map.html#details) for details).
- References and pointers to keys or values in the map are invalidated in the same way as iterators to these keys-values.
- For iterators of `tsl::robin_map`, `operator*()` and `operator->()` return a reference and a pointer to `const std::pair<Key, T>` instead of `std::pair<const Key, T>` making the value `T` not modifiable. To modify the value you have to call the `value()` method of the iterator to get a mutable reference. Example:
```c++
tsl::robin_map<int, int> map = {{1, 1}, {2, 1}, {3, 1}};
for(auto it = map.begin(); it != map.end(); ++it) {
//it->second = 2; // Illegal
it.value() = 2; // Ok
}
```
- No support for some buckets related methods (like `bucket_size`, `bucket`, ...).
These differences also apply between `std::unordered_set` and `tsl::robin_set`.
Thread-safety guarantees are the same as `std::unordered_map/set` (i.e. possible to have multiple readers with no writer).
### Growth policy
The library supports multiple growth policies through the `GrowthPolicy` template parameter. Three policies are provided by the library but you can easily implement your own if needed.
* **[tsl::rh::power_of_two_growth_policy.](https://tessil.github.io/robin-map/classtsl_1_1rh_1_1power__of__two__growth__policy.html)** Default policy used by `tsl::robin_map/set`. This policy keeps the size of the bucket array of the hash table to a power of two. This constraint allows the policy to avoid the usage of the slow modulo operation to map a hash to a bucket, instead of <code>hash % 2<sup>n</sup></code>, it uses <code>hash & (2<sup>n</sup> - 1)</code> (see [fast modulo](https://en.wikipedia.org/wiki/Modulo_operation#Performance_issues)). Fast but this may cause a lot of collisions with a poor hash function as the modulo with a power of two only masks the most significant bits in the end.
* **[tsl::rh::prime_growth_policy.](https://tessil.github.io/robin-map/classtsl_1_1rh_1_1prime__growth__policy.html)** Default policy used by `tsl::robin_pg_map/set`. The policy keeps the size of the bucket array of the hash table to a prime number. When mapping a hash to a bucket, using a prime number as modulo will result in a better distribution of the hash across the buckets even with a poor hash function. To allow the compiler to optimize the modulo operation, the policy use a lookup table with constant primes modulos (see [API](https://tessil.github.io/robin-map/classtsl_1_1rh_1_1prime__growth__policy.html#details) for details). Slower than `tsl::rh::power_of_two_growth_policy` but more secure.
* **[tsl::rh::mod_growth_policy.](https://tessil.github.io/robin-map/classtsl_1_1rh_1_1mod__growth__policy.html)** The policy grows the map by a customizable growth factor passed in parameter. It then just use the modulo operator to map a hash to a bucket. Slower but more flexible.
To implement your own policy, you have to implement the following interface.
```c++
struct custom_policy {
// Called on hash table construction and rehash, min_bucket_count_in_out is the minimum buckets
// that the hash table needs. The policy can change it to a higher number of buckets if needed
// and the hash table will use this value as bucket count. If 0 bucket is asked, then the value
// must stay at 0.
explicit custom_policy(std::size_t& min_bucket_count_in_out);
// Return the bucket [0, bucket_count()) to which the hash belongs.
// If bucket_count() is 0, it must always return 0.
std::size_t bucket_for_hash(std::size_t hash) const noexcept;
// Return the number of buckets that should be used on next growth
std::size_t next_bucket_count() const;
// Maximum number of buckets supported by the policy
std::size_t max_bucket_count() const;
// Reset the growth policy as if the policy was created with a bucket count of 0.
// After a clear, the policy must always return 0 when bucket_for_hash() is called.
void clear() noexcept;
}
```
### Installation
To use robin-map, just add the [include](include/) directory to your include path. It is a **header-only** library.
If you use CMake, you can also use the `tsl::robin_map` exported target from the [CMakeLists.txt](CMakeLists.txt) with `target_link_libraries`.
```cmake
# Example where the robin-map project is stored in a third-party directory
add_subdirectory(third-party/robin-map)
target_link_libraries(your_target PRIVATE tsl::robin_map)
```
If the project has been installed through `make install`, you can also use `find_package(tsl-robin-map REQUIRED)` instead of `add_subdirectory`.
The library is available in [vcpkg](https://github.com/Microsoft/vcpkg/tree/master/ports/robin-map) and [conan](https://bintray.com/tessil/tsl/tsl-robin-map%3Atessil). It's also present in [Debian](https://packages.debian.org/buster/robin-map-dev), [Ubuntu](https://packages.ubuntu.com/disco/robin-map-dev) and [Fedora](https://apps.fedoraproject.org/packages/robin-map-devel) package repositories.
The code should work with any C++11 standard-compliant compiler and has been tested with GCC 4.8.4, Clang 3.5.0 and Visual Studio 2015.
To run the tests you will need the Boost Test library and CMake.
```bash
git clone https://github.com/Tessil/robin-map.git
cd robin-map/tests
mkdir build
cd build
cmake ..
cmake --build .
./tsl_robin_map_tests
```
### Usage
The API can be found [here](https://tessil.github.io/robin-map/).
All methods are not documented yet, but they replicate the behavior of the ones in `std::unordered_map` and `std::unordered_set`, except if specified otherwise.
### Example
```c++
#include <cstdint>
#include <iostream>
#include <string>
#include <tsl/robin_map.h>
#include <tsl/robin_set.h>
int main() {
tsl::robin_map<std::string, int> map = {{"a", 1}, {"b", 2}};
map["c"] = 3;
map["d"] = 4;
map.insert({"e", 5});
map.erase("b");
for(auto it = map.begin(); it != map.end(); ++it) {
//it->second += 2; // Not valid.
it.value() += 2;
}
// {d, 6} {a, 3} {e, 7} {c, 5}
for(const auto& key_value : map) {
std::cout << "{" << key_value.first << ", " << key_value.second << "}" << std::endl;
}
if(map.find("a") != map.end()) {
std::cout << "Found \"a\"." << std::endl;
}
const std::size_t precalculated_hash = std::hash<std::string>()("a");
// If we already know the hash beforehand, we can pass it in parameter to speed-up lookups.
if(map.find("a", precalculated_hash) != map.end()) {
std::cout << "Found \"a\" with hash " << precalculated_hash << "." << std::endl;
}
/*
* Calculating the hash and comparing two std::string may be slow.
* We can store the hash of each std::string in the hash map to make
* the inserts and lookups faster by setting StoreHash to true.
*/
tsl::robin_map<std::string, int, std::hash<std::string>,
std::equal_to<std::string>,
std::allocator<std::pair<std::string, int>>,
true> map2;
map2["a"] = 1;
map2["b"] = 2;
// {a, 1} {b, 2}
for(const auto& key_value : map2) {
std::cout << "{" << key_value.first << ", " << key_value.second << "}" << std::endl;
}
tsl::robin_set<int> set;
set.insert({1, 9, 0});
set.insert({2, -1, 9});
// {0} {1} {2} {9} {-1}
for(const auto& key : set) {
std::cout << "{" << key << "}" << std::endl;
}
}
```
#### Heterogeneous lookups
Heterogeneous overloads allow the usage of other types than `Key` for lookup and erase operations as long as the used types are hashable and comparable to `Key`.
To activate the heterogeneous overloads in `tsl::robin_map/set`, the qualified-id `KeyEqual::is_transparent` must be valid. It works the same way as for [`std::map::find`](http://en.cppreference.com/w/cpp/container/map/find). You can either use [`std::equal_to<>`](http://en.cppreference.com/w/cpp/utility/functional/equal_to_void) or define your own function object.
Both `KeyEqual` and `Hash` will need to be able to deal with the different types.
```c++
#include <functional>
#include <iostream>
#include <string>
#include <tsl/robin_map.h>
struct employee {
employee(int id, std::string name) : m_id(id), m_name(std::move(name)) {
}
// Either we include the comparators in the class and we use `std::equal_to<>`...
friend bool operator==(const employee& empl, int empl_id) {
return empl.m_id == empl_id;
}
friend bool operator==(int empl_id, const employee& empl) {
return empl_id == empl.m_id;
}
friend bool operator==(const employee& empl1, const employee& empl2) {
return empl1.m_id == empl2.m_id;
}
int m_id;
std::string m_name;
};
// ... or we implement a separate class to compare employees.
struct equal_employee {
using is_transparent = void;
bool operator()(const employee& empl, int empl_id) const {
return empl.m_id == empl_id;
}
bool operator()(int empl_id, const employee& empl) const {
return empl_id == empl.m_id;
}
bool operator()(const employee& empl1, const employee& empl2) const {
return empl1.m_id == empl2.m_id;
}
};
struct hash_employee {
std::size_t operator()(const employee& empl) const {
return std::hash<int>()(empl.m_id);
}
std::size_t operator()(int id) const {
return std::hash<int>()(id);
}
};
int main() {
// Use std::equal_to<> which will automatically deduce and forward the parameters
tsl::robin_map<employee, int, hash_employee, std::equal_to<>> map;
map.insert({employee(1, "John Doe"), 2001});
map.insert({employee(2, "Jane Doe"), 2002});
map.insert({employee(3, "John Smith"), 2003});
// John Smith 2003
auto it = map.find(3);
if(it != map.end()) {
std::cout << it->first.m_name << " " << it->second << std::endl;
}
map.erase(1);
// Use a custom KeyEqual which has an is_transparent member type
tsl::robin_map<employee, int, hash_employee, equal_employee> map2;
map2.insert({employee(4, "Johnny Doe"), 2004});
// 2004
std::cout << map2.at(4) << std::endl;
}
```
### License
The code is licensed under the MIT license, see the [LICENSE file](LICENSE) for details.

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environment:
BOOST_ROOT: C:\Libraries\boost_1_67_0
matrix:
- APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
ARCH: Win32
BOOST_LIBRARYDIR: C:\Libraries\boost_1_67_0\lib32-msvc-14.0
CMAKE_GENERATOR: Visual Studio 14 2015
- APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
ARCH: x64
BOOST_LIBRARYDIR: C:\Libraries\boost_1_67_0\lib64-msvc-14.0
CMAKE_GENERATOR: Visual Studio 14 2015 Win64
- APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
ARCH: Win32
BOOST_LIBRARYDIR: C:\Libraries\boost_1_67_0\lib32-msvc-14.1
CMAKE_GENERATOR: Visual Studio 15 2017
CXXFLAGS: /permissive-
- APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
ARCH: x64
BOOST_LIBRARYDIR: C:\Libraries\boost_1_67_0\lib64-msvc-14.1
CMAKE_GENERATOR: Visual Studio 15 2017 Win64
CXXFLAGS: /permissive-
configuration:
- Debug
- Release
build_script:
- cd tests
- mkdir build
- cd build
- cmake -DCMAKE_BUILD_TYPE=%CONFIGURATION% -G"%CMAKE_GENERATOR%" ..
- cmake --build . --config %CONFIGURATION%
test_script:
- set PATH=%PATH%;%BOOST_LIBRARYDIR%
- .\%CONFIGURATION%\tsl_robin_map_tests.exe

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# This module sets the following variables:
# * tsl-robin-map_FOUND - true if tsl-robin-map found on the system
# * tsl-robin-map_INCLUDE_DIRS - the directory containing tsl-robin-map headers
@PACKAGE_INIT@
if(NOT TARGET tsl::robin_map)
include("${CMAKE_CURRENT_LIST_DIR}/tsl-robin-mapTargets.cmake")
get_target_property(tsl-robin-map_INCLUDE_DIRS tsl::robin_map INTERFACE_INCLUDE_DIRECTORIES)
endif()

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TSL_ROBIN_GROWTH_POLICY_H
#define TSL_ROBIN_GROWTH_POLICY_H
#include <algorithm>
#include <array>
#include <climits>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <iterator>
#include <limits>
#include <ratio>
#include <stdexcept>
#ifdef TSL_DEBUG
# define tsl_rh_assert(expr) assert(expr)
#else
# define tsl_rh_assert(expr) (static_cast<void>(0))
#endif
/**
* If exceptions are enabled, throw the exception passed in parameter, otherwise call std::terminate.
*/
#if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) || (defined (_MSC_VER) && defined (_CPPUNWIND))) && !defined(TSL_NO_EXCEPTIONS)
# define TSL_RH_THROW_OR_TERMINATE(ex, msg) throw ex(msg)
#else
# define TSL_RH_NO_EXCEPTIONS
# ifdef NDEBUG
# define TSL_RH_THROW_OR_TERMINATE(ex, msg) std::terminate()
# else
# include <iostream>
# define TSL_RH_THROW_OR_TERMINATE(ex, msg) do { std::cerr << msg << std::endl; std::terminate(); } while(0)
# endif
#endif
#if defined(__GNUC__) || defined(__clang__)
# define TSL_RH_LIKELY(exp) (__builtin_expect(!!(exp), true))
#else
# define TSL_RH_LIKELY(exp) (exp)
#endif
namespace tsl {
namespace rh {
/**
* Grow the hash table by a factor of GrowthFactor keeping the bucket count to a power of two. It allows
* the table to use a mask operation instead of a modulo operation to map a hash to a bucket.
*
* GrowthFactor must be a power of two >= 2.
*/
template<std::size_t GrowthFactor>
class power_of_two_growth_policy {
public:
/**
* Called on the hash table creation and on rehash. The number of buckets for the table is passed in parameter.
* This number is a minimum, the policy may update this value with a higher value if needed (but not lower).
*
* If 0 is given, min_bucket_count_in_out must still be 0 after the policy creation and
* bucket_for_hash must always return 0 in this case.
*/
explicit power_of_two_growth_policy(std::size_t& min_bucket_count_in_out) {
if(min_bucket_count_in_out > max_bucket_count()) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
if(min_bucket_count_in_out > 0) {
min_bucket_count_in_out = round_up_to_power_of_two(min_bucket_count_in_out);
m_mask = min_bucket_count_in_out - 1;
}
else {
m_mask = 0;
}
}
/**
* Return the bucket [0, bucket_count()) to which the hash belongs.
* If bucket_count() is 0, it must always return 0.
*/
std::size_t bucket_for_hash(std::size_t hash) const noexcept {
return hash & m_mask;
}
/**
* Return the number of buckets that should be used on next growth.
*/
std::size_t next_bucket_count() const {
if((m_mask + 1) > max_bucket_count() / GrowthFactor) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
return (m_mask + 1) * GrowthFactor;
}
/**
* Return the maximum number of buckets supported by the policy.
*/
std::size_t max_bucket_count() const {
// Largest power of two.
return (std::numeric_limits<std::size_t>::max() / 2) + 1;
}
/**
* Reset the growth policy as if it was created with a bucket count of 0.
* After a clear, the policy must always return 0 when bucket_for_hash is called.
*/
void clear() noexcept {
m_mask = 0;
}
private:
static std::size_t round_up_to_power_of_two(std::size_t value) {
if(is_power_of_two(value)) {
return value;
}
if(value == 0) {
return 1;
}
--value;
for(std::size_t i = 1; i < sizeof(std::size_t) * CHAR_BIT; i *= 2) {
value |= value >> i;
}
return value + 1;
}
static constexpr bool is_power_of_two(std::size_t value) {
return value != 0 && (value & (value - 1)) == 0;
}
protected:
static_assert(is_power_of_two(GrowthFactor) && GrowthFactor >= 2, "GrowthFactor must be a power of two >= 2.");
std::size_t m_mask;
};
/**
* Grow the hash table by GrowthFactor::num / GrowthFactor::den and use a modulo to map a hash
* to a bucket. Slower but it can be useful if you want a slower growth.
*/
template<class GrowthFactor = std::ratio<3, 2>>
class mod_growth_policy {
public:
explicit mod_growth_policy(std::size_t& min_bucket_count_in_out) {
if(min_bucket_count_in_out > max_bucket_count()) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
if(min_bucket_count_in_out > 0) {
m_mod = min_bucket_count_in_out;
}
else {
m_mod = 1;
}
}
std::size_t bucket_for_hash(std::size_t hash) const noexcept {
return hash % m_mod;
}
std::size_t next_bucket_count() const {
if(m_mod == max_bucket_count()) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
const double next_bucket_count = std::ceil(double(m_mod) * REHASH_SIZE_MULTIPLICATION_FACTOR);
if(!std::isnormal(next_bucket_count)) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
if(next_bucket_count > double(max_bucket_count())) {
return max_bucket_count();
}
else {
return std::size_t(next_bucket_count);
}
}
std::size_t max_bucket_count() const {
return MAX_BUCKET_COUNT;
}
void clear() noexcept {
m_mod = 1;
}
private:
static constexpr double REHASH_SIZE_MULTIPLICATION_FACTOR = 1.0 * GrowthFactor::num / GrowthFactor::den;
static const std::size_t MAX_BUCKET_COUNT =
std::size_t(double(
std::numeric_limits<std::size_t>::max() / REHASH_SIZE_MULTIPLICATION_FACTOR
));
static_assert(REHASH_SIZE_MULTIPLICATION_FACTOR >= 1.1, "Growth factor should be >= 1.1.");
std::size_t m_mod;
};
namespace detail {
#if SIZE_MAX >= ULLONG_MAX
#define TSL_RH_NB_PRIMES 51
#elif SIZE_MAX >= ULONG_MAX
#define TSL_RH_NB_PRIMES 40
#else
#define TSL_RH_NB_PRIMES 23
#endif
static constexpr const std::array<std::size_t, TSL_RH_NB_PRIMES> PRIMES = {{
1u, 5u, 17u, 29u, 37u, 53u, 67u, 79u, 97u, 131u, 193u, 257u, 389u, 521u, 769u, 1031u,
1543u, 2053u, 3079u, 6151u, 12289u, 24593u, 49157u,
#if SIZE_MAX >= ULONG_MAX
98317ul, 196613ul, 393241ul, 786433ul, 1572869ul, 3145739ul, 6291469ul, 12582917ul,
25165843ul, 50331653ul, 100663319ul, 201326611ul, 402653189ul, 805306457ul, 1610612741ul,
3221225473ul, 4294967291ul,
#endif
#if SIZE_MAX >= ULLONG_MAX
6442450939ull, 12884901893ull, 25769803751ull, 51539607551ull, 103079215111ull, 206158430209ull,
412316860441ull, 824633720831ull, 1649267441651ull, 3298534883309ull, 6597069766657ull,
#endif
}};
template<unsigned int IPrime>
static constexpr std::size_t mod(std::size_t hash) { return hash % PRIMES[IPrime]; }
// MOD_PRIME[iprime](hash) returns hash % PRIMES[iprime]. This table allows for faster modulo as the
// compiler can optimize the modulo code better with a constant known at the compilation.
static constexpr const std::array<std::size_t(*)(std::size_t), TSL_RH_NB_PRIMES> MOD_PRIME = {{
&mod<0>, &mod<1>, &mod<2>, &mod<3>, &mod<4>, &mod<5>, &mod<6>, &mod<7>, &mod<8>, &mod<9>, &mod<10>,
&mod<11>, &mod<12>, &mod<13>, &mod<14>, &mod<15>, &mod<16>, &mod<17>, &mod<18>, &mod<19>, &mod<20>,
&mod<21>, &mod<22>,
#if SIZE_MAX >= ULONG_MAX
&mod<23>, &mod<24>, &mod<25>, &mod<26>, &mod<27>, &mod<28>, &mod<29>, &mod<30>, &mod<31>, &mod<32>,
&mod<33>, &mod<34>, &mod<35>, &mod<36>, &mod<37> , &mod<38>, &mod<39>,
#endif
#if SIZE_MAX >= ULLONG_MAX
&mod<40>, &mod<41>, &mod<42>, &mod<43>, &mod<44>, &mod<45>, &mod<46>, &mod<47>, &mod<48>, &mod<49>,
&mod<50>,
#endif
}};
}
/**
* Grow the hash table by using prime numbers as bucket count. Slower than tsl::rh::power_of_two_growth_policy in
* general but will probably distribute the values around better in the buckets with a poor hash function.
*
* To allow the compiler to optimize the modulo operation, a lookup table is used with constant primes numbers.
*
* With a switch the code would look like:
* \code
* switch(iprime) { // iprime is the current prime of the hash table
* case 0: hash % 5ul;
* break;
* case 1: hash % 17ul;
* break;
* case 2: hash % 29ul;
* break;
* ...
* }
* \endcode
*
* Due to the constant variable in the modulo the compiler is able to optimize the operation
* by a series of multiplications, substractions and shifts.
*
* The 'hash % 5' could become something like 'hash - (hash * 0xCCCCCCCD) >> 34) * 5' in a 64 bits environment.
*/
class prime_growth_policy {
public:
explicit prime_growth_policy(std::size_t& min_bucket_count_in_out) {
auto it_prime = std::lower_bound(detail::PRIMES.begin(),
detail::PRIMES.end(), min_bucket_count_in_out);
if(it_prime == detail::PRIMES.end()) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
m_iprime = static_cast<unsigned int>(std::distance(detail::PRIMES.begin(), it_prime));
if(min_bucket_count_in_out > 0) {
min_bucket_count_in_out = *it_prime;
}
else {
min_bucket_count_in_out = 0;
}
}
std::size_t bucket_for_hash(std::size_t hash) const noexcept {
return detail::MOD_PRIME[m_iprime](hash);
}
std::size_t next_bucket_count() const {
if(m_iprime + 1 >= detail::PRIMES.size()) {
TSL_RH_THROW_OR_TERMINATE(std::length_error, "The hash table exceeds its maximum size.");
}
return detail::PRIMES[m_iprime + 1];
}
std::size_t max_bucket_count() const {
return detail::PRIMES.back();
}
void clear() noexcept {
m_iprime = 0;
}
private:
unsigned int m_iprime;
static_assert(std::numeric_limits<decltype(m_iprime)>::max() >= detail::PRIMES.size(),
"The type of m_iprime is not big enough.");
};
}
}
#endif

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TSL_ROBIN_MAP_H
#define TSL_ROBIN_MAP_H
#include <cstddef>
#include <functional>
#include <initializer_list>
#include <memory>
#include <type_traits>
#include <utility>
#include "robin_hash.h"
namespace tsl {
/**
* Implementation of a hash map using open-addressing and the robin hood hashing algorithm with backward shift deletion.
*
* For operations modifying the hash map (insert, erase, rehash, ...), the strong exception guarantee
* is only guaranteed when the expression `std::is_nothrow_swappable<std::pair<Key, T>>::value &&
* std::is_nothrow_move_constructible<std::pair<Key, T>>::value` is true, otherwise if an exception
* is thrown during the swap or the move, the hash map may end up in a undefined state. Per the standard
* a `Key` or `T` with a noexcept copy constructor and no move constructor also satisfies the
* `std::is_nothrow_move_constructible<std::pair<Key, T>>::value` criterion (and will thus guarantee the
* strong exception for the map).
*
* When `StoreHash` is true, 32 bits of the hash are stored alongside the values. It can improve
* the performance during lookups if the `KeyEqual` function takes time (if it engenders a cache-miss for example)
* as we then compare the stored hashes before comparing the keys. When `tsl::rh::power_of_two_growth_policy` is used
* as `GrowthPolicy`, it may also speed-up the rehash process as we can avoid to recalculate the hash.
* When it is detected that storing the hash will not incur any memory penalty due to alignment (i.e.
* `sizeof(tsl::detail_robin_hash::bucket_entry<ValueType, true>) ==
* sizeof(tsl::detail_robin_hash::bucket_entry<ValueType, false>)`) and `tsl::rh::power_of_two_growth_policy` is
* used, the hash will be stored even if `StoreHash` is false so that we can speed-up the rehash (but it will
* not be used on lookups unless `StoreHash` is true).
*
* `GrowthPolicy` defines how the map grows and consequently how a hash value is mapped to a bucket.
* By default the map uses `tsl::rh::power_of_two_growth_policy`. This policy keeps the number of buckets
* to a power of two and uses a mask to map the hash to a bucket instead of the slow modulo.
* Other growth policies are available and you may define your own growth policy,
* check `tsl::rh::power_of_two_growth_policy` for the interface.
*
* `std::pair<Key, T>` must be swappable.
*
* `Key` and `T` must be copy and/or move constructible.
*
* If the destructor of `Key` or `T` throws an exception, the behaviour of the class is undefined.
*
* Iterators invalidation:
* - clear, operator=, reserve, rehash: always invalidate the iterators.
* - insert, emplace, emplace_hint, operator[]: if there is an effective insert, invalidate the iterators.
* - erase: always invalidate the iterators.
*/
template<class Key,
class T,
class Hash = std::hash<Key>,
class KeyEqual = std::equal_to<Key>,
class Allocator = std::allocator<std::pair<Key, T>>,
bool StoreHash = false,
class GrowthPolicy = tsl::rh::power_of_two_growth_policy<2>>
class robin_map {
private:
template<typename U>
using has_is_transparent = tsl::detail_robin_hash::has_is_transparent<U>;
class KeySelect {
public:
using key_type = Key;
const key_type& operator()(const std::pair<Key, T>& key_value) const noexcept {
return key_value.first;
}
key_type& operator()(std::pair<Key, T>& key_value) noexcept {
return key_value.first;
}
};
class ValueSelect {
public:
using value_type = T;
const value_type& operator()(const std::pair<Key, T>& key_value) const noexcept {
return key_value.second;
}
value_type& operator()(std::pair<Key, T>& key_value) noexcept {
return key_value.second;
}
};
using ht = detail_robin_hash::robin_hash<std::pair<Key, T>, KeySelect, ValueSelect,
Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy>;
public:
using key_type = typename ht::key_type;
using mapped_type = T;
using value_type = typename ht::value_type;
using size_type = typename ht::size_type;
using difference_type = typename ht::difference_type;
using hasher = typename ht::hasher;
using key_equal = typename ht::key_equal;
using allocator_type = typename ht::allocator_type;
using reference = typename ht::reference;
using const_reference = typename ht::const_reference;
using pointer = typename ht::pointer;
using const_pointer = typename ht::const_pointer;
using iterator = typename ht::iterator;
using const_iterator = typename ht::const_iterator;
public:
/*
* Constructors
*/
robin_map(): robin_map(ht::DEFAULT_INIT_BUCKETS_SIZE) {
}
explicit robin_map(size_type bucket_count,
const Hash& hash = Hash(),
const KeyEqual& equal = KeyEqual(),
const Allocator& alloc = Allocator()):
m_ht(bucket_count, hash, equal, alloc)
{
}
robin_map(size_type bucket_count,
const Allocator& alloc): robin_map(bucket_count, Hash(), KeyEqual(), alloc)
{
}
robin_map(size_type bucket_count,
const Hash& hash,
const Allocator& alloc): robin_map(bucket_count, hash, KeyEqual(), alloc)
{
}
explicit robin_map(const Allocator& alloc): robin_map(ht::DEFAULT_INIT_BUCKETS_SIZE, alloc) {
}
template<class InputIt>
robin_map(InputIt first, InputIt last,
size_type bucket_count = ht::DEFAULT_INIT_BUCKETS_SIZE,
const Hash& hash = Hash(),
const KeyEqual& equal = KeyEqual(),
const Allocator& alloc = Allocator()): robin_map(bucket_count, hash, equal, alloc)
{
insert(first, last);
}
template<class InputIt>
robin_map(InputIt first, InputIt last,
size_type bucket_count,
const Allocator& alloc): robin_map(first, last, bucket_count, Hash(), KeyEqual(), alloc)
{
}
template<class InputIt>
robin_map(InputIt first, InputIt last,
size_type bucket_count,
const Hash& hash,
const Allocator& alloc): robin_map(first, last, bucket_count, hash, KeyEqual(), alloc)
{
}
robin_map(std::initializer_list<value_type> init,
size_type bucket_count = ht::DEFAULT_INIT_BUCKETS_SIZE,
const Hash& hash = Hash(),
const KeyEqual& equal = KeyEqual(),
const Allocator& alloc = Allocator()):
robin_map(init.begin(), init.end(), bucket_count, hash, equal, alloc)
{
}
robin_map(std::initializer_list<value_type> init,
size_type bucket_count,
const Allocator& alloc):
robin_map(init.begin(), init.end(), bucket_count, Hash(), KeyEqual(), alloc)
{
}
robin_map(std::initializer_list<value_type> init,
size_type bucket_count,
const Hash& hash,
const Allocator& alloc):
robin_map(init.begin(), init.end(), bucket_count, hash, KeyEqual(), alloc)
{
}
robin_map& operator=(std::initializer_list<value_type> ilist) {
m_ht.clear();
m_ht.reserve(ilist.size());
m_ht.insert(ilist.begin(), ilist.end());
return *this;
}
allocator_type get_allocator() const { return m_ht.get_allocator(); }
/*
* Iterators
*/
iterator begin() noexcept { return m_ht.begin(); }
const_iterator begin() const noexcept { return m_ht.begin(); }
const_iterator cbegin() const noexcept { return m_ht.cbegin(); }
iterator end() noexcept { return m_ht.end(); }
const_iterator end() const noexcept { return m_ht.end(); }
const_iterator cend() const noexcept { return m_ht.cend(); }
/*
* Capacity
*/
bool empty() const noexcept { return m_ht.empty(); }
size_type size() const noexcept { return m_ht.size(); }
size_type max_size() const noexcept { return m_ht.max_size(); }
/*
* Modifiers
*/
void clear() noexcept { m_ht.clear(); }
std::pair<iterator, bool> insert(const value_type& value) {
return m_ht.insert(value);
}
template<class P, typename std::enable_if<std::is_constructible<value_type, P&&>::value>::type* = nullptr>
std::pair<iterator, bool> insert(P&& value) {
return m_ht.emplace(std::forward<P>(value));
}
std::pair<iterator, bool> insert(value_type&& value) {
return m_ht.insert(std::move(value));
}
iterator insert(const_iterator hint, const value_type& value) {
return m_ht.insert_hint(hint, value);
}
template<class P, typename std::enable_if<std::is_constructible<value_type, P&&>::value>::type* = nullptr>
iterator insert(const_iterator hint, P&& value) {
return m_ht.emplace_hint(hint, std::forward<P>(value));
}
iterator insert(const_iterator hint, value_type&& value) {
return m_ht.insert_hint(hint, std::move(value));
}
template<class InputIt>
void insert(InputIt first, InputIt last) {
m_ht.insert(first, last);
}
void insert(std::initializer_list<value_type> ilist) {
m_ht.insert(ilist.begin(), ilist.end());
}
template<class M>
std::pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj) {
return m_ht.insert_or_assign(k, std::forward<M>(obj));
}
template<class M>
std::pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj) {
return m_ht.insert_or_assign(std::move(k), std::forward<M>(obj));
}
template<class M>
iterator insert_or_assign(const_iterator hint, const key_type& k, M&& obj) {
return m_ht.insert_or_assign(hint, k, std::forward<M>(obj));
}
template<class M>
iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj) {
return m_ht.insert_or_assign(hint, std::move(k), std::forward<M>(obj));
}
/**
* Due to the way elements are stored, emplace will need to move or copy the key-value once.
* The method is equivalent to insert(value_type(std::forward<Args>(args)...));
*
* Mainly here for compatibility with the std::unordered_map interface.
*/
template<class... Args>
std::pair<iterator, bool> emplace(Args&&... args) {
return m_ht.emplace(std::forward<Args>(args)...);
}
/**
* Due to the way elements are stored, emplace_hint will need to move or copy the key-value once.
* The method is equivalent to insert(hint, value_type(std::forward<Args>(args)...));
*
* Mainly here for compatibility with the std::unordered_map interface.
*/
template<class... Args>
iterator emplace_hint(const_iterator hint, Args&&... args) {
return m_ht.emplace_hint(hint, std::forward<Args>(args)...);
}
template<class... Args>
std::pair<iterator, bool> try_emplace(const key_type& k, Args&&... args) {
return m_ht.try_emplace(k, std::forward<Args>(args)...);
}
template<class... Args>
std::pair<iterator, bool> try_emplace(key_type&& k, Args&&... args) {
return m_ht.try_emplace(std::move(k), std::forward<Args>(args)...);
}
template<class... Args>
iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args) {
return m_ht.try_emplace_hint(hint, k, std::forward<Args>(args)...);
}
template<class... Args>
iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args) {
return m_ht.try_emplace_hint(hint, std::move(k), std::forward<Args>(args)...);
}
iterator erase(iterator pos) { return m_ht.erase(pos); }
iterator erase(const_iterator pos) { return m_ht.erase(pos); }
iterator erase(const_iterator first, const_iterator last) { return m_ht.erase(first, last); }
size_type erase(const key_type& key) { return m_ht.erase(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup to the value if you already have the hash.
*/
size_type erase(const key_type& key, std::size_t precalculated_hash) {
return m_ht.erase(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type erase(const K& key) { return m_ht.erase(key); }
/**
* @copydoc erase(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup to the value if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type erase(const K& key, std::size_t precalculated_hash) {
return m_ht.erase(key, precalculated_hash);
}
void swap(robin_map& other) { other.m_ht.swap(m_ht); }
/*
* Lookup
*/
T& at(const Key& key) { return m_ht.at(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
T& at(const Key& key, std::size_t precalculated_hash) { return m_ht.at(key, precalculated_hash); }
const T& at(const Key& key) const { return m_ht.at(key); }
/**
* @copydoc at(const Key& key, std::size_t precalculated_hash)
*/
const T& at(const Key& key, std::size_t precalculated_hash) const { return m_ht.at(key, precalculated_hash); }
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
T& at(const K& key) { return m_ht.at(key); }
/**
* @copydoc at(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
T& at(const K& key, std::size_t precalculated_hash) { return m_ht.at(key, precalculated_hash); }
/**
* @copydoc at(const K& key)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
const T& at(const K& key) const { return m_ht.at(key); }
/**
* @copydoc at(const K& key, std::size_t precalculated_hash)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
const T& at(const K& key, std::size_t precalculated_hash) const { return m_ht.at(key, precalculated_hash); }
T& operator[](const Key& key) { return m_ht[key]; }
T& operator[](Key&& key) { return m_ht[std::move(key)]; }
size_type count(const Key& key) const { return m_ht.count(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
size_type count(const Key& key, std::size_t precalculated_hash) const {
return m_ht.count(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type count(const K& key) const { return m_ht.count(key); }
/**
* @copydoc count(const K& key) const
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type count(const K& key, std::size_t precalculated_hash) const { return m_ht.count(key, precalculated_hash); }
iterator find(const Key& key) { return m_ht.find(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
iterator find(const Key& key, std::size_t precalculated_hash) { return m_ht.find(key, precalculated_hash); }
const_iterator find(const Key& key) const { return m_ht.find(key); }
/**
* @copydoc find(const Key& key, std::size_t precalculated_hash)
*/
const_iterator find(const Key& key, std::size_t precalculated_hash) const {
return m_ht.find(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
iterator find(const K& key) { return m_ht.find(key); }
/**
* @copydoc find(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
iterator find(const K& key, std::size_t precalculated_hash) { return m_ht.find(key, precalculated_hash); }
/**
* @copydoc find(const K& key)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
const_iterator find(const K& key) const { return m_ht.find(key); }
/**
* @copydoc find(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
const_iterator find(const K& key, std::size_t precalculated_hash) const {
return m_ht.find(key, precalculated_hash);
}
bool contains(const Key& key) const { return m_ht.contains(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
bool contains(const Key& key, std::size_t precalculated_hash) const {
return m_ht.contains(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
bool contains(const K& key) const { return m_ht.contains(key); }
/**
* @copydoc contains(const K& key) const
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
bool contains(const K& key, std::size_t precalculated_hash) const {
return m_ht.contains(key, precalculated_hash);
}
std::pair<iterator, iterator> equal_range(const Key& key) { return m_ht.equal_range(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
std::pair<iterator, iterator> equal_range(const Key& key, std::size_t precalculated_hash) {
return m_ht.equal_range(key, precalculated_hash);
}
std::pair<const_iterator, const_iterator> equal_range(const Key& key) const { return m_ht.equal_range(key); }
/**
* @copydoc equal_range(const Key& key, std::size_t precalculated_hash)
*/
std::pair<const_iterator, const_iterator> equal_range(const Key& key, std::size_t precalculated_hash) const {
return m_ht.equal_range(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<iterator, iterator> equal_range(const K& key) { return m_ht.equal_range(key); }
/**
* @copydoc equal_range(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<iterator, iterator> equal_range(const K& key, std::size_t precalculated_hash) {
return m_ht.equal_range(key, precalculated_hash);
}
/**
* @copydoc equal_range(const K& key)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<const_iterator, const_iterator> equal_range(const K& key) const { return m_ht.equal_range(key); }
/**
* @copydoc equal_range(const K& key, std::size_t precalculated_hash)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<const_iterator, const_iterator> equal_range(const K& key, std::size_t precalculated_hash) const {
return m_ht.equal_range(key, precalculated_hash);
}
/*
* Bucket interface
*/
size_type bucket_count() const { return m_ht.bucket_count(); }
size_type max_bucket_count() const { return m_ht.max_bucket_count(); }
/*
* Hash policy
*/
float load_factor() const { return m_ht.load_factor(); }
float min_load_factor() const { return m_ht.min_load_factor(); }
float max_load_factor() const { return m_ht.max_load_factor(); }
/**
* Set the `min_load_factor` to `ml`. When the `load_factor` of the map goes
* below `min_load_factor` after some erase operations, the map will be
* shrunk when an insertion occurs. The erase method itself never shrinks
* the map.
*
* The default value of `min_load_factor` is 0.0f, the map never shrinks by default.
*/
void min_load_factor(float ml) { m_ht.min_load_factor(ml); }
void max_load_factor(float ml) { m_ht.max_load_factor(ml); }
void rehash(size_type count) { m_ht.rehash(count); }
void reserve(size_type count) { m_ht.reserve(count); }
/*
* Observers
*/
hasher hash_function() const { return m_ht.hash_function(); }
key_equal key_eq() const { return m_ht.key_eq(); }
/*
* Other
*/
/**
* Convert a const_iterator to an iterator.
*/
iterator mutable_iterator(const_iterator pos) {
return m_ht.mutable_iterator(pos);
}
friend bool operator==(const robin_map& lhs, const robin_map& rhs) {
if(lhs.size() != rhs.size()) {
return false;
}
for(const auto& element_lhs: lhs) {
const auto it_element_rhs = rhs.find(element_lhs.first);
if(it_element_rhs == rhs.cend() || element_lhs.second != it_element_rhs->second) {
return false;
}
}
return true;
}
friend bool operator!=(const robin_map& lhs, const robin_map& rhs) {
return !operator==(lhs, rhs);
}
friend void swap(robin_map& lhs, robin_map& rhs) {
lhs.swap(rhs);
}
private:
ht m_ht;
};
/**
* Same as `tsl::robin_map<Key, T, Hash, KeyEqual, Allocator, StoreHash, tsl::rh::prime_growth_policy>`.
*/
template<class Key,
class T,
class Hash = std::hash<Key>,
class KeyEqual = std::equal_to<Key>,
class Allocator = std::allocator<std::pair<Key, T>>,
bool StoreHash = false>
using robin_pg_map = robin_map<Key, T, Hash, KeyEqual, Allocator, StoreHash, tsl::rh::prime_growth_policy>;
} // end namespace tsl
#endif

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TSL_ROBIN_SET_H
#define TSL_ROBIN_SET_H
#include <cstddef>
#include <functional>
#include <initializer_list>
#include <memory>
#include <type_traits>
#include <utility>
#include "robin_hash.h"
namespace tsl {
/**
* Implementation of a hash set using open-addressing and the robin hood hashing algorithm with backward shift deletion.
*
* For operations modifying the hash set (insert, erase, rehash, ...), the strong exception guarantee
* is only guaranteed when the expression `std::is_nothrow_swappable<Key>::value &&
* std::is_nothrow_move_constructible<Key>::value` is true, otherwise if an exception
* is thrown during the swap or the move, the hash set may end up in a undefined state. Per the standard
* a `Key` with a noexcept copy constructor and no move constructor also satisfies the
* `std::is_nothrow_move_constructible<Key>::value` criterion (and will thus guarantee the
* strong exception for the set).
*
* When `StoreHash` is true, 32 bits of the hash are stored alongside the values. It can improve
* the performance during lookups if the `KeyEqual` function takes time (or engenders a cache-miss for example)
* as we then compare the stored hashes before comparing the keys. When `tsl::rh::power_of_two_growth_policy` is used
* as `GrowthPolicy`, it may also speed-up the rehash process as we can avoid to recalculate the hash.
* When it is detected that storing the hash will not incur any memory penalty due to alignment (i.e.
* `sizeof(tsl::detail_robin_hash::bucket_entry<ValueType, true>) ==
* sizeof(tsl::detail_robin_hash::bucket_entry<ValueType, false>)`) and `tsl::rh::power_of_two_growth_policy` is
* used, the hash will be stored even if `StoreHash` is false so that we can speed-up the rehash (but it will
* not be used on lookups unless `StoreHash` is true).
*
* `GrowthPolicy` defines how the set grows and consequently how a hash value is mapped to a bucket.
* By default the set uses `tsl::rh::power_of_two_growth_policy`. This policy keeps the number of buckets
* to a power of two and uses a mask to set the hash to a bucket instead of the slow modulo.
* Other growth policies are available and you may define your own growth policy,
* check `tsl::rh::power_of_two_growth_policy` for the interface.
*
* `Key` must be swappable.
*
* `Key` must be copy and/or move constructible.
*
* If the destructor of `Key` throws an exception, the behaviour of the class is undefined.
*
* Iterators invalidation:
* - clear, operator=, reserve, rehash: always invalidate the iterators.
* - insert, emplace, emplace_hint, operator[]: if there is an effective insert, invalidate the iterators.
* - erase: always invalidate the iterators.
*/
template<class Key,
class Hash = std::hash<Key>,
class KeyEqual = std::equal_to<Key>,
class Allocator = std::allocator<Key>,
bool StoreHash = false,
class GrowthPolicy = tsl::rh::power_of_two_growth_policy<2>>
class robin_set {
private:
template<typename U>
using has_is_transparent = tsl::detail_robin_hash::has_is_transparent<U>;
class KeySelect {
public:
using key_type = Key;
const key_type& operator()(const Key& key) const noexcept {
return key;
}
key_type& operator()(Key& key) noexcept {
return key;
}
};
using ht = detail_robin_hash::robin_hash<Key, KeySelect, void,
Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy>;
public:
using key_type = typename ht::key_type;
using value_type = typename ht::value_type;
using size_type = typename ht::size_type;
using difference_type = typename ht::difference_type;
using hasher = typename ht::hasher;
using key_equal = typename ht::key_equal;
using allocator_type = typename ht::allocator_type;
using reference = typename ht::reference;
using const_reference = typename ht::const_reference;
using pointer = typename ht::pointer;
using const_pointer = typename ht::const_pointer;
using iterator = typename ht::iterator;
using const_iterator = typename ht::const_iterator;
/*
* Constructors
*/
robin_set(): robin_set(ht::DEFAULT_INIT_BUCKETS_SIZE) {
}
explicit robin_set(size_type bucket_count,
const Hash& hash = Hash(),
const KeyEqual& equal = KeyEqual(),
const Allocator& alloc = Allocator()):
m_ht(bucket_count, hash, equal, alloc)
{
}
robin_set(size_type bucket_count,
const Allocator& alloc): robin_set(bucket_count, Hash(), KeyEqual(), alloc)
{
}
robin_set(size_type bucket_count,
const Hash& hash,
const Allocator& alloc): robin_set(bucket_count, hash, KeyEqual(), alloc)
{
}
explicit robin_set(const Allocator& alloc): robin_set(ht::DEFAULT_INIT_BUCKETS_SIZE, alloc) {
}
template<class InputIt>
robin_set(InputIt first, InputIt last,
size_type bucket_count = ht::DEFAULT_INIT_BUCKETS_SIZE,
const Hash& hash = Hash(),
const KeyEqual& equal = KeyEqual(),
const Allocator& alloc = Allocator()): robin_set(bucket_count, hash, equal, alloc)
{
insert(first, last);
}
template<class InputIt>
robin_set(InputIt first, InputIt last,
size_type bucket_count,
const Allocator& alloc): robin_set(first, last, bucket_count, Hash(), KeyEqual(), alloc)
{
}
template<class InputIt>
robin_set(InputIt first, InputIt last,
size_type bucket_count,
const Hash& hash,
const Allocator& alloc): robin_set(first, last, bucket_count, hash, KeyEqual(), alloc)
{
}
robin_set(std::initializer_list<value_type> init,
size_type bucket_count = ht::DEFAULT_INIT_BUCKETS_SIZE,
const Hash& hash = Hash(),
const KeyEqual& equal = KeyEqual(),
const Allocator& alloc = Allocator()):
robin_set(init.begin(), init.end(), bucket_count, hash, equal, alloc)
{
}
robin_set(std::initializer_list<value_type> init,
size_type bucket_count,
const Allocator& alloc):
robin_set(init.begin(), init.end(), bucket_count, Hash(), KeyEqual(), alloc)
{
}
robin_set(std::initializer_list<value_type> init,
size_type bucket_count,
const Hash& hash,
const Allocator& alloc):
robin_set(init.begin(), init.end(), bucket_count, hash, KeyEqual(), alloc)
{
}
robin_set& operator=(std::initializer_list<value_type> ilist) {
m_ht.clear();
m_ht.reserve(ilist.size());
m_ht.insert(ilist.begin(), ilist.end());
return *this;
}
allocator_type get_allocator() const { return m_ht.get_allocator(); }
/*
* Iterators
*/
iterator begin() noexcept { return m_ht.begin(); }
const_iterator begin() const noexcept { return m_ht.begin(); }
const_iterator cbegin() const noexcept { return m_ht.cbegin(); }
iterator end() noexcept { return m_ht.end(); }
const_iterator end() const noexcept { return m_ht.end(); }
const_iterator cend() const noexcept { return m_ht.cend(); }
/*
* Capacity
*/
bool empty() const noexcept { return m_ht.empty(); }
size_type size() const noexcept { return m_ht.size(); }
size_type max_size() const noexcept { return m_ht.max_size(); }
/*
* Modifiers
*/
void clear() noexcept { m_ht.clear(); }
std::pair<iterator, bool> insert(const value_type& value) {
return m_ht.insert(value);
}
std::pair<iterator, bool> insert(value_type&& value) {
return m_ht.insert(std::move(value));
}
iterator insert(const_iterator hint, const value_type& value) {
return m_ht.insert_hint(hint, value);
}
iterator insert(const_iterator hint, value_type&& value) {
return m_ht.insert_hint(hint, std::move(value));
}
template<class InputIt>
void insert(InputIt first, InputIt last) {
m_ht.insert(first, last);
}
void insert(std::initializer_list<value_type> ilist) {
m_ht.insert(ilist.begin(), ilist.end());
}
/**
* Due to the way elements are stored, emplace will need to move or copy the key-value once.
* The method is equivalent to insert(value_type(std::forward<Args>(args)...));
*
* Mainly here for compatibility with the std::unordered_map interface.
*/
template<class... Args>
std::pair<iterator, bool> emplace(Args&&... args) {
return m_ht.emplace(std::forward<Args>(args)...);
}
/**
* Due to the way elements are stored, emplace_hint will need to move or copy the key-value once.
* The method is equivalent to insert(hint, value_type(std::forward<Args>(args)...));
*
* Mainly here for compatibility with the std::unordered_map interface.
*/
template<class... Args>
iterator emplace_hint(const_iterator hint, Args&&... args) {
return m_ht.emplace_hint(hint, std::forward<Args>(args)...);
}
iterator erase(iterator pos) { return m_ht.erase(pos); }
iterator erase(const_iterator pos) { return m_ht.erase(pos); }
iterator erase(const_iterator first, const_iterator last) { return m_ht.erase(first, last); }
size_type erase(const key_type& key) { return m_ht.erase(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup to the value if you already have the hash.
*/
size_type erase(const key_type& key, std::size_t precalculated_hash) {
return m_ht.erase(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type erase(const K& key) { return m_ht.erase(key); }
/**
* @copydoc erase(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup to the value if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type erase(const K& key, std::size_t precalculated_hash) {
return m_ht.erase(key, precalculated_hash);
}
void swap(robin_set& other) { other.m_ht.swap(m_ht); }
/*
* Lookup
*/
size_type count(const Key& key) const { return m_ht.count(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
size_type count(const Key& key, std::size_t precalculated_hash) const { return m_ht.count(key, precalculated_hash); }
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type count(const K& key) const { return m_ht.count(key); }
/**
* @copydoc count(const K& key) const
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
size_type count(const K& key, std::size_t precalculated_hash) const { return m_ht.count(key, precalculated_hash); }
iterator find(const Key& key) { return m_ht.find(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
iterator find(const Key& key, std::size_t precalculated_hash) { return m_ht.find(key, precalculated_hash); }
const_iterator find(const Key& key) const { return m_ht.find(key); }
/**
* @copydoc find(const Key& key, std::size_t precalculated_hash)
*/
const_iterator find(const Key& key, std::size_t precalculated_hash) const { return m_ht.find(key, precalculated_hash); }
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
iterator find(const K& key) { return m_ht.find(key); }
/**
* @copydoc find(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
iterator find(const K& key, std::size_t precalculated_hash) { return m_ht.find(key, precalculated_hash); }
/**
* @copydoc find(const K& key)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
const_iterator find(const K& key) const { return m_ht.find(key); }
/**
* @copydoc find(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
const_iterator find(const K& key, std::size_t precalculated_hash) const { return m_ht.find(key, precalculated_hash); }
bool contains(const Key& key) const { return m_ht.contains(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
bool contains(const Key& key, std::size_t precalculated_hash) const {
return m_ht.contains(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
bool contains(const K& key) const { return m_ht.contains(key); }
/**
* @copydoc contains(const K& key) const
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
bool contains(const K& key, std::size_t precalculated_hash) const {
return m_ht.contains(key, precalculated_hash);
}
std::pair<iterator, iterator> equal_range(const Key& key) { return m_ht.equal_range(key); }
/**
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
std::pair<iterator, iterator> equal_range(const Key& key, std::size_t precalculated_hash) {
return m_ht.equal_range(key, precalculated_hash);
}
std::pair<const_iterator, const_iterator> equal_range(const Key& key) const { return m_ht.equal_range(key); }
/**
* @copydoc equal_range(const Key& key, std::size_t precalculated_hash)
*/
std::pair<const_iterator, const_iterator> equal_range(const Key& key, std::size_t precalculated_hash) const {
return m_ht.equal_range(key, precalculated_hash);
}
/**
* This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists.
* If so, K must be hashable and comparable to Key.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<iterator, iterator> equal_range(const K& key) { return m_ht.equal_range(key); }
/**
* @copydoc equal_range(const K& key)
*
* Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same
* as hash_function()(key). Useful to speed-up the lookup if you already have the hash.
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<iterator, iterator> equal_range(const K& key, std::size_t precalculated_hash) {
return m_ht.equal_range(key, precalculated_hash);
}
/**
* @copydoc equal_range(const K& key)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<const_iterator, const_iterator> equal_range(const K& key) const { return m_ht.equal_range(key); }
/**
* @copydoc equal_range(const K& key, std::size_t precalculated_hash)
*/
template<class K, class KE = KeyEqual, typename std::enable_if<has_is_transparent<KE>::value>::type* = nullptr>
std::pair<const_iterator, const_iterator> equal_range(const K& key, std::size_t precalculated_hash) const {
return m_ht.equal_range(key, precalculated_hash);
}
/*
* Bucket interface
*/
size_type bucket_count() const { return m_ht.bucket_count(); }
size_type max_bucket_count() const { return m_ht.max_bucket_count(); }
/*
* Hash policy
*/
float load_factor() const { return m_ht.load_factor(); }
float min_load_factor() const { return m_ht.min_load_factor(); }
float max_load_factor() const { return m_ht.max_load_factor(); }
/**
* Set the `min_load_factor` to `ml`. When the `load_factor` of the set goes
* below `min_load_factor` after some erase operations, the set will be
* shrunk when an insertion occurs. The erase method itself never shrinks
* the set.
*
* The default value of `min_load_factor` is 0.0f, the set never shrinks by default.
*/
void min_load_factor(float ml) { m_ht.min_load_factor(ml); }
void max_load_factor(float ml) { m_ht.max_load_factor(ml); }
void rehash(size_type count) { m_ht.rehash(count); }
void reserve(size_type count) { m_ht.reserve(count); }
/*
* Observers
*/
hasher hash_function() const { return m_ht.hash_function(); }
key_equal key_eq() const { return m_ht.key_eq(); }
/*
* Other
*/
/**
* Convert a const_iterator to an iterator.
*/
iterator mutable_iterator(const_iterator pos) {
return m_ht.mutable_iterator(pos);
}
friend bool operator==(const robin_set& lhs, const robin_set& rhs) {
if(lhs.size() != rhs.size()) {
return false;
}
for(const auto& element_lhs: lhs) {
const auto it_element_rhs = rhs.find(element_lhs);
if(it_element_rhs == rhs.cend()) {
return false;
}
}
return true;
}
friend bool operator!=(const robin_set& lhs, const robin_set& rhs) {
return !operator==(lhs, rhs);
}
friend void swap(robin_set& lhs, robin_set& rhs) {
lhs.swap(rhs);
}
private:
ht m_ht;
};
/**
* Same as `tsl::robin_set<Key, Hash, KeyEqual, Allocator, StoreHash, tsl::rh::prime_growth_policy>`.
*/
template<class Key,
class Hash = std::hash<Key>,
class KeyEqual = std::equal_to<Key>,
class Allocator = std::allocator<Key>,
bool StoreHash = false>
using robin_pg_set = robin_set<Key, Hash, KeyEqual, Allocator, StoreHash, tsl::rh::prime_growth_policy>;
} // end namespace tsl
#endif

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cmake_minimum_required(VERSION 3.8)
project(tsl_robin_map_tests)
add_executable(tsl_robin_map_tests "main.cpp"
"custom_allocator_tests.cpp"
"policy_tests.cpp"
"robin_map_tests.cpp"
"robin_set_tests.cpp")
target_compile_features(tsl_robin_map_tests PRIVATE cxx_std_11)
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
target_compile_options(tsl_robin_map_tests PRIVATE -Werror -Wall -Wextra -Wold-style-cast -DTSL_DEBUG -UNDEBUG)
elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
target_compile_options(tsl_robin_map_tests PRIVATE /bigobj /WX /W3 /DTSL_DEBUG /UNDEBUG)
endif()
# Boost::unit_test_framework
find_package(Boost 1.54.0 REQUIRED COMPONENTS unit_test_framework)
target_link_libraries(tsl_robin_map_tests PRIVATE Boost::unit_test_framework)
# tsl::robin_map
add_subdirectory(../ ${CMAKE_CURRENT_BINARY_DIR}/tsl)
target_link_libraries(tsl_robin_map_tests PRIVATE tsl::robin_map)

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define BOOST_TEST_DYN_LINK
#include <boost/test/unit_test.hpp>
#include <cstddef>
#include <cstdlib>
#include <functional>
#include <limits>
#include <stdexcept>
#include <type_traits>
#include <utility>
#include <tsl/robin_map.h>
#include "utils.h"
static std::size_t nb_custom_allocs = 0;
template<typename T>
class custom_allocator {
public:
using value_type = T;
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
using propagate_on_container_move_assignment = std::true_type;
template<typename U>
struct rebind {
using other = custom_allocator<U>;
};
custom_allocator() = default;
custom_allocator(const custom_allocator&) = default;
template<typename U>
custom_allocator(const custom_allocator<U>&) {
}
pointer address(reference x) const noexcept {
return &x;
}
const_pointer address(const_reference x) const noexcept {
return &x;
}
pointer allocate(size_type n, const void* /*hint*/ = 0) {
nb_custom_allocs++;
pointer ptr = static_cast<pointer>(std::malloc(n * sizeof(T)));
if(ptr == nullptr) {
#ifdef TSL_RH_NO_EXCEPTIONS
std::abort();
#else
throw std::bad_alloc();
#endif
}
return ptr;
}
void deallocate(T* p, size_type /*n*/) {
std::free(p);
}
size_type max_size() const noexcept {
return std::numeric_limits<size_type>::max()/sizeof(value_type);
}
template<typename U, typename... Args>
void construct(U* p, Args&&... args) {
::new(static_cast<void *>(p)) U(std::forward<Args>(args)...);
}
template<typename U>
void destroy(U* p) {
p->~U();
}
};
template <class T, class U>
bool operator==(const custom_allocator<T>&, const custom_allocator<U>&) {
return true;
}
template <class T, class U>
bool operator!=(const custom_allocator<T>&, const custom_allocator<U>&) {
return false;
}
//TODO Avoid overloading new to check number of global new
// static std::size_t nb_global_new = 0;
// void* operator new(std::size_t sz) {
// nb_global_new++;
// return std::malloc(sz);
// }
//
// void operator delete(void* ptr) noexcept {
// std::free(ptr);
// }
BOOST_AUTO_TEST_SUITE(test_custom_allocator)
BOOST_AUTO_TEST_CASE(test_custom_allocator_1) {
// nb_global_new = 0;
nb_custom_allocs = 0;
tsl::robin_map<int, int, std::hash<int>, std::equal_to<int>,
custom_allocator<std::pair<int, int>>> map;
const int nb_elements = 1000;
for(int i = 0; i < nb_elements; i++) {
map.insert({i, i*2});
}
BOOST_CHECK_NE(nb_custom_allocs, 0);
// BOOST_CHECK_EQUAL(nb_global_new, 0);
}
BOOST_AUTO_TEST_SUITE_END()

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define BOOST_TEST_MODULE robin_map_tests
#define BOOST_TEST_DYN_LINK
#include <boost/test/unit_test.hpp>

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define BOOST_TEST_DYN_LINK
#include <boost/test/unit_test.hpp>
#include <boost/mpl/list.hpp>
#include <cstddef>
#include <limits>
#include <ratio>
#include <stdexcept>
#include <tsl/robin_growth_policy.h>
#include "utils.h"
BOOST_AUTO_TEST_SUITE(test_policy)
using test_types = boost::mpl::list<tsl::rh::power_of_two_growth_policy<2>,
tsl::rh::power_of_two_growth_policy<4>,
tsl::rh::prime_growth_policy,
tsl::rh::mod_growth_policy<>,
tsl::rh::mod_growth_policy<std::ratio<7,2>>>;
BOOST_AUTO_TEST_CASE_TEMPLATE(test_policy, Policy, test_types) {
// Call next_bucket_count() on the policy until we reach its max_bucket_count()
std::size_t bucket_count = 0;
Policy policy(bucket_count);
BOOST_CHECK_EQUAL(policy.bucket_for_hash(0), 0);
BOOST_CHECK_EQUAL(bucket_count, 0);
#ifndef TSL_RH_NO_EXCEPTIONS
bool exception_thrown = false;
try {
while(true) {
const std::size_t previous_bucket_count = bucket_count;
bucket_count = policy.next_bucket_count();
policy = Policy(bucket_count);
BOOST_CHECK_EQUAL(policy.bucket_for_hash(0), 0);
BOOST_CHECK(bucket_count > previous_bucket_count);
}
}
catch(const std::length_error& ) {
exception_thrown = true;
}
BOOST_CHECK(exception_thrown);
#endif
}
BOOST_AUTO_TEST_CASE_TEMPLATE(test_policy_min_bucket_count, Policy, test_types) {
// Check policy when a bucket_count of 0 is asked.
std::size_t bucket_count = 0;
Policy policy(bucket_count);
BOOST_CHECK_EQUAL(policy.bucket_for_hash(0), 0);
}
BOOST_AUTO_TEST_CASE_TEMPLATE(test_policy_max_bucket_count, Policy, test_types) {
// Test a bucket_count equals to the max_bucket_count limit and above
std::size_t bucket_count = 0;
Policy policy(bucket_count);
bucket_count = policy.max_bucket_count();
Policy policy2(bucket_count);
bucket_count = std::numeric_limits<std::size_t>::max();
TSL_RH_CHECK_THROW((Policy(bucket_count)), std::length_error);
bucket_count = policy.max_bucket_count() + 1;
TSL_RH_CHECK_THROW((Policy(bucket_count)), std::length_error);
}
BOOST_AUTO_TEST_SUITE_END()

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define BOOST_TEST_DYN_LINK
#include <boost/test/unit_test.hpp>
#include <boost/mpl/list.hpp>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <memory>
#include <string>
#include <tuple>
#include <utility>
#include <tsl/robin_set.h>
#include "utils.h"
BOOST_AUTO_TEST_SUITE(test_robin_set)
using test_types = boost::mpl::list<tsl::robin_set<std::int64_t>,
tsl::robin_set<std::string>,
tsl::robin_set<self_reference_member_test>,
tsl::robin_set<move_only_test>,
tsl::robin_pg_set<self_reference_member_test>,
tsl::robin_set<move_only_test,
std::hash<move_only_test>,
std::equal_to<move_only_test>,
std::allocator<move_only_test>,
true,
tsl::rh::prime_growth_policy>,
tsl::robin_set<self_reference_member_test,
std::hash<self_reference_member_test>,
std::equal_to<self_reference_member_test>,
std::allocator<self_reference_member_test>,
true,
tsl::rh::mod_growth_policy<>>,
tsl::robin_set<move_only_test,
std::hash<move_only_test>,
std::equal_to<move_only_test>,
std::allocator<move_only_test>,
false,
tsl::rh::mod_growth_policy<>>
>;
BOOST_AUTO_TEST_CASE_TEMPLATE(test_insert, HSet, test_types) {
// insert x values, insert them again, check values
using key_t = typename HSet::key_type;
const std::size_t nb_values = 1000;
HSet set;
typename HSet::iterator it;
bool inserted;
for(std::size_t i = 0; i < nb_values; i++) {
std::tie(it, inserted) = set.insert(utils::get_key<key_t>(i));
BOOST_CHECK_EQUAL(*it, utils::get_key<key_t>(i));
BOOST_CHECK(inserted);
}
BOOST_CHECK_EQUAL(set.size(), nb_values);
for(std::size_t i = 0; i < nb_values; i++) {
std::tie(it, inserted) = set.insert(utils::get_key<key_t>(i));
BOOST_CHECK_EQUAL(*it, utils::get_key<key_t>(i));
BOOST_CHECK(!inserted);
}
for(std::size_t i = 0; i < nb_values; i++) {
it = set.find(utils::get_key<key_t>(i));
BOOST_CHECK_EQUAL(*it, utils::get_key<key_t>(i));
}
}
BOOST_AUTO_TEST_CASE(test_compare) {
const tsl::robin_set<std::string> set1 = {"a", "e", "d", "c", "b"};
const tsl::robin_set<std::string> set1_copy = {"e", "c", "b", "a", "d"};
const tsl::robin_set<std::string> set2 = {"e", "c", "b", "a", "d", "f"};
const tsl::robin_set<std::string> set3 = {"e", "c", "b", "a"};
const tsl::robin_set<std::string> set4 = {"a", "e", "d", "c", "z"};
BOOST_CHECK(set1 == set1_copy);
BOOST_CHECK(set1_copy == set1);
BOOST_CHECK(set1 != set2);
BOOST_CHECK(set2 != set1);
BOOST_CHECK(set1 != set3);
BOOST_CHECK(set3 != set1);
BOOST_CHECK(set1 != set4);
BOOST_CHECK(set4 != set1);
BOOST_CHECK(set2 != set3);
BOOST_CHECK(set3 != set2);
BOOST_CHECK(set2 != set4);
BOOST_CHECK(set4 != set2);
BOOST_CHECK(set3 != set4);
BOOST_CHECK(set4 != set3);
}
BOOST_AUTO_TEST_CASE(test_insert_pointer) {
// Test added mainly to be sure that the code compiles with MSVC due to a bug in the compiler.
// See robin_hash::insert_value_impl for details.
std::string value;
std::string* value_ptr = &value;
tsl::robin_set<std::string*> set;
set.insert(value_ptr);
set.emplace(value_ptr);
BOOST_CHECK_EQUAL(set.size(), 1);
BOOST_CHECK_EQUAL(**set.begin(), value);
}
BOOST_AUTO_TEST_SUITE_END()

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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TSL_UTILS_H
#define TSL_UTILS_H
#include <cstddef>
#include <cstdint>
#include <functional>
#include <memory>
#include <ostream>
#include <string>
#include <utility>
#include <tsl/robin_hash.h>
#ifdef TSL_RH_NO_EXCEPTIONS
#define TSL_RH_CHECK_THROW(S, E)
#else
#define TSL_RH_CHECK_THROW(S, E) BOOST_CHECK_THROW(S, E)
#endif
template<typename T>
class identity_hash {
public:
std::size_t operator()(const T& value) const {
return static_cast<std::size_t>(value);
}
};
template<unsigned int MOD>
class mod_hash {
public:
template<typename T>
std::size_t operator()(const T& value) const {
return std::hash<T>()(value) % MOD;
}
};
class self_reference_member_test {
public:
self_reference_member_test() : m_value(std::to_string(-1)), m_value_ptr(&m_value) {
}
explicit self_reference_member_test(std::int64_t value) : m_value(std::to_string(value)), m_value_ptr(&m_value) {
}
self_reference_member_test(const self_reference_member_test& other) : m_value(*other.m_value_ptr), m_value_ptr(&m_value) {
}
self_reference_member_test(self_reference_member_test&& other) : m_value(*other.m_value_ptr), m_value_ptr(&m_value) {
}
self_reference_member_test& operator=(const self_reference_member_test& other) {
m_value = *other.m_value_ptr;
m_value_ptr = &m_value;
return *this;
}
self_reference_member_test& operator=(self_reference_member_test&& other) {
m_value = *other.m_value_ptr;
m_value_ptr = &m_value;
return *this;
}
std::string value() const {
return *m_value_ptr;
}
friend std::ostream& operator<<(std::ostream& stream, const self_reference_member_test& value) {
stream << *value.m_value_ptr;
return stream;
}
friend bool operator==(const self_reference_member_test& lhs, const self_reference_member_test& rhs) {
return *lhs.m_value_ptr == *rhs.m_value_ptr;
}
friend bool operator!=(const self_reference_member_test& lhs, const self_reference_member_test& rhs) {
return !(lhs == rhs);
}
friend bool operator<(const self_reference_member_test& lhs, const self_reference_member_test& rhs) {
return *lhs.m_value_ptr < *rhs.m_value_ptr;
}
private:
std::string m_value;
std::string* m_value_ptr;
};
class move_only_test {
public:
explicit move_only_test(std::int64_t value) : m_value(new std::string(std::to_string(value))) {
}
move_only_test(const move_only_test&) = delete;
move_only_test(move_only_test&&) = default;
move_only_test& operator=(const move_only_test&) = delete;
move_only_test& operator=(move_only_test&&) = default;
friend std::ostream& operator<<(std::ostream& stream, const move_only_test& value) {
if(value.m_value == nullptr) {
stream << "null";
}
else {
stream << *value.m_value;
}
return stream;
}
friend bool operator==(const move_only_test& lhs, const move_only_test& rhs) {
if(lhs.m_value == nullptr || rhs.m_value == nullptr) {
return lhs.m_value == nullptr && rhs.m_value == nullptr;
}
else {
return *lhs.m_value == *rhs.m_value;
}
}
friend bool operator!=(const move_only_test& lhs, const move_only_test& rhs) {
return !(lhs == rhs);
}
friend bool operator<(const move_only_test& lhs, const move_only_test& rhs) {
if(lhs.m_value == nullptr && rhs.m_value == nullptr) {
return false;
}
else if(lhs.m_value == nullptr) {
return true;
}
else if(rhs.m_value == nullptr) {
return false;
}
else {
return *lhs.m_value < *rhs.m_value;
}
}
const std::string& value() const {
return *m_value;
}
private:
std::unique_ptr<std::string> m_value;
};
class copy_only_test {
public:
explicit copy_only_test(std::int64_t value): m_value(std::to_string(value)) {
}
copy_only_test(const copy_only_test& other): m_value(other.m_value) {
}
copy_only_test& operator=(const copy_only_test& other) {
m_value = other.m_value;
return *this;
}
~copy_only_test() {
}
friend std::ostream& operator<<(std::ostream& stream, const copy_only_test& value) {
stream << value.m_value;
return stream;
}
friend bool operator==(const copy_only_test& lhs, const copy_only_test& rhs) {
return lhs.m_value == rhs.m_value;
}
friend bool operator!=(const copy_only_test& lhs, const copy_only_test& rhs) {
return !(lhs == rhs);
}
friend bool operator<(const copy_only_test& lhs, const copy_only_test& rhs) {
return lhs.m_value < rhs.m_value;
}
std::string value() const {
return m_value;
}
private:
std::string m_value;
};
namespace std {
template<>
struct hash<self_reference_member_test> {
std::size_t operator()(const self_reference_member_test& val) const {
return std::hash<std::string>()(val.value());
}
};
template<>
struct hash<move_only_test> {
std::size_t operator()(const move_only_test& val) const {
return std::hash<std::string>()(val.value());
}
};
template<>
struct hash<copy_only_test> {
std::size_t operator()(const copy_only_test& val) const {
return std::hash<std::string>()(val.value());
}
};
}
class utils {
public:
template<typename T>
static T get_key(std::size_t counter);
template<typename T>
static T get_value(std::size_t counter);
template<typename HMap>
static HMap get_filled_hash_map(std::size_t nb_elements);
};
template<>
inline std::int64_t utils::get_key<std::int64_t>(std::size_t counter) {
return tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter);
}
template<>
inline self_reference_member_test utils::get_key<self_reference_member_test>(std::size_t counter) {
return self_reference_member_test(tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter));
}
template<>
inline std::string utils::get_key<std::string>(std::size_t counter) {
return "Key " + std::to_string(counter);
}
template<>
inline move_only_test utils::get_key<move_only_test>(std::size_t counter) {
return move_only_test(tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter));
}
template<>
inline copy_only_test utils::get_key<copy_only_test>(std::size_t counter) {
return copy_only_test(tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter));
}
template<>
inline std::int64_t utils::get_value<std::int64_t>(std::size_t counter) {
return tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter*2);
}
template<>
inline self_reference_member_test utils::get_value<self_reference_member_test>(std::size_t counter) {
return self_reference_member_test(tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter*2));
}
template<>
inline std::string utils::get_value<std::string>(std::size_t counter) {
return "Value " + std::to_string(counter);
}
template<>
inline move_only_test utils::get_value<move_only_test>(std::size_t counter) {
return move_only_test(tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter*2));
}
template<>
inline copy_only_test utils::get_value<copy_only_test>(std::size_t counter) {
return copy_only_test(tsl::detail_robin_hash::numeric_cast<std::int64_t>(counter*2));
}
template<typename HMap>
inline HMap utils::get_filled_hash_map(std::size_t nb_elements) {
using key_t = typename HMap::key_type; using value_t = typename HMap:: mapped_type;
HMap map;
map.reserve(nb_elements);
for(std::size_t i = 0; i < nb_elements; i++) {
map.insert({utils::get_key<key_t>(i), utils::get_value<value_t>(i)});
}
return map;
}
#endif

78
externals/robin-map/tsl-robin-map.natvis vendored Normal file
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@ -0,0 +1,78 @@
<?xml version="1.0" encoding="utf-8"?>
<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
<!-- Written in VC 2017 15.7 but is expected to be compatible with VC 2015 -->
<!-- Visualization that shows the index in the name column and the key-value pair in the value column -->
<Type Name="tsl::robin_map&lt;*&gt;" Priority="Medium">
<AlternativeType Name="tsl::robin_set&lt;*&gt;"/>
<DisplayString>{{ size={m_ht.m_nb_elements} }}</DisplayString>
<Expand>
<Item Name="[bucket_count]" IncludeView="detailed">m_ht.m_buckets_data._Mypair._Myval2._Mylast - m_ht.m_buckets_data._Mypair._Myval2._Myfirst</Item>
<Item Name="[load_factor]" Condition="m_ht.m_buckets_data._Mypair._Myval2._Myfirst != m_ht.m_buckets_data._Mypair._Myval2._Mylast" IncludeView="detailed">
((float)m_ht.m_nb_elements) / ((float)(m_ht.m_buckets_data._Mypair._Myval2._Mylast - m_ht.m_buckets_data._Mypair._Myval2._Myfirst))
</Item>
<Item Name="[load_factor]" Condition="m_ht.m_buckets_data._Mypair._Myval2._Myfirst == m_ht.m_buckets_data._Mypair._Myval2._Mylast" IncludeView="detailed">
0
</Item>
<Item Name="[max_load_factor]" IncludeView="detailed">m_ht.m_max_load_factor</Item>
<CustomListItems>
<Variable Name="bucket" InitialValue="m_ht.m_buckets"/>
<Size>m_ht.m_nb_elements</Size>
<Loop>
<Item Condition="bucket-&gt;m_dist_from_ideal_bucket != -1">*bucket</Item>
<Break Condition="bucket-&gt;m_last_bucket"/>
<Exec>++bucket</Exec>
</Loop>
</CustomListItems>
</Expand>
</Type>
<!-- Visualization that shows the key in the name column and the key-value pair in the value column -->
<Type Name="tsl::robin_map&lt;*&gt;" ExcludeView="ShowElementsByIndex" Priority="MediumHigh">
<DisplayString>{{ size={m_ht.m_nb_elements} }}</DisplayString>
<Expand>
<Item Name="[bucket_count]" IncludeView="detailed">m_ht.m_buckets_data._Mypair._Myval2._Mylast - m_ht.m_buckets_data._Mypair._Myval2._Myfirst</Item>
<Item Name="[load_factor]" Condition="m_ht.m_buckets_data._Mypair._Myval2._Myfirst != m_ht.m_buckets_data._Mypair._Myval2._Mylast" IncludeView="detailed">
((float)m_ht.m_nb_elements) / ((float)(m_ht.m_buckets_data._Mypair._Myval2._Mylast - m_ht.m_buckets_data._Mypair._Myval2._Myfirst))
</Item>
<Item Name="[load_factor]" Condition="m_ht.m_buckets_data._Mypair._Myval2._Myfirst == m_ht.m_buckets_data._Mypair._Myval2._Mylast" IncludeView="detailed">
0
</Item>
<Item Name="[max_load_factor]" IncludeView="detailed">m_ht.m_max_load_factor</Item>
<CustomListItems>
<Variable Name="bucket" InitialValue="m_ht.m_buckets"/>
<Size>m_ht.m_nb_elements</Size>
<Loop>
<Item Condition="bucket-&gt;m_dist_from_ideal_bucket != -1" Name="[{reinterpret_cast&lt;std::pair&lt;$T1,$T2&gt;*&gt;(&amp;bucket->m_value)->first}]">*bucket</Item>
<Break Condition="bucket-&gt;m_last_bucket"/>
<Exec>++bucket</Exec>
</Loop>
</CustomListItems>
</Expand>
</Type>
<Type Name="tsl::detail_robin_hash::robin_hash&lt;*&gt;::robin_iterator&lt;*&gt;">
<DisplayString>{*m_bucket}</DisplayString>
<Expand>
<ExpandedItem>*m_bucket</ExpandedItem>
</Expand>
</Type>
<Type Name="tsl::detail_robin_hash::bucket_entry&lt;*&gt;">
<DisplayString Condition="m_dist_from_ideal_bucket == -1">empty</DisplayString>
<DisplayString Condition="m_dist_from_ideal_bucket != -1">{*reinterpret_cast&lt;$T1*&gt;(&amp;m_value)}</DisplayString>
<Expand>
<ExpandedItem Condition="m_dist_from_ideal_bucket != -1">*reinterpret_cast&lt;$T1*&gt;(&amp;m_value)</ExpandedItem>
</Expand>
</Type>
<Type Name="tsl::detail_robin_hash::bucket_entry&lt;*&gt;" IncludeView="MapHelper">
<DisplayString Condition="m_dist_from_ideal_bucket == -1">empty</DisplayString>
<DisplayString Condition="m_dist_from_ideal_bucket != -1">{reinterpret_cast&lt;$T1*&gt;(&amp;m_value)->second}</DisplayString>
<Expand>
<ExpandedItem Condition="m_dist_from_ideal_bucket != -1">*reinterpret_cast&lt;$T1*&gt;(&amp;m_value)</ExpandedItem>
</Expand>
</Type>
</AutoVisualizer>