Migrate to C++17. Update sol2 to 3.3.0. (Project-OSRM#6279)

* Migrate to C++17. Update sol2 to 3.3.0.

CHANGELOG.md

@@ -5,6 +5,7 @@
     - Misc:
       - FIXED: Fix bug with reading Set values from Lua scripts. [#6285](https://github.com/Project-OSRM/osrm-backend/pull/6285)
     - Build:
+      - CHANGED: Migrate to C++17. Update sol2 to 3.3.0. Fix bug with reading Set values from Lua scripts. [#6279](https://github.com/Project-OSRM/osrm-backend/pull/6279)
       - CHANGED: Update macOS CI image to macos-11. [#6286](https://github.com/Project-OSRM/osrm-backend/pull/6286)
       - CHANGED: Enable even more clang-tidy checks. [#6273](https://github.com/Project-OSRM/osrm-backend/pull/6273)
       - CHANGED: Configure CMake to not build flatbuffers tests and samples. [#6274](https://github.com/Project-OSRM/osrm-backend/pull/6274)

CMakeLists.txt

@@ -1,5 +1,8 @@
 cmake_minimum_required(VERSION 3.2)
 
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
+
 if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR AND NOT MSVC_IDE)
   message(FATAL_ERROR "In-source builds are not allowed.
 Please create a directory and run cmake from there, passing the path to this source directory as the last argument.
@@ -145,7 +148,7 @@ endif()
 
 include_directories(BEFORE ${CMAKE_CURRENT_BINARY_DIR}/include/)
 include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR}/include/)
-include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/third_party/sol2/)
+include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/third_party/sol2-3.3.0/include)
 include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/third_party/variant/include)
 
 set(BOOST_COMPONENTS date_time chrono filesystem iostreams program_options regex system thread unit_test_framework)
@@ -413,8 +416,8 @@ set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${LINKER_FLAGS}")
 
 # Activate C++1y
 if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
-  set(OSRM_CXXFLAGS "${OSRM_CXXFLAGS} -std=c++14")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
+  set(OSRM_CXXFLAGS "${OSRM_CXXFLAGS} -std=c++17")
 endif()
 
 # Configuring other platform dependencies

include/extractor/scripting_environment_lua.hpp

@@ -12,7 +12,7 @@
 #include <mutex>
 #include <string>
 
-#include <sol.hpp>
+#include <sol/sol.hpp>
 
 namespace osrm
 {

src/extractor/scripting_environment_lua.cpp

@@ -965,14 +965,10 @@ Sol2ScriptingEnvironment::GetStringListFromTable(const std::string &table_name)
     auto &context = GetSol2Context();
     BOOST_ASSERT(context.state.lua_state() != nullptr);
     std::vector<std::string> strings;
-    if (!context.profile_table[table_name])
+    sol::optional<sol::table> table = context.profile_table[table_name];
+    if (table && table->valid())
     {
-        return strings;
-    }
-    sol::table table = context.profile_table[table_name];
-    if (table.valid())
-    {
-        for (auto &&pair : table)
+        for (auto &&pair : *table)
         {
             strings.emplace_back(GetSetOrSequenceValue(pair));
         }
@@ -987,17 +983,13 @@ Sol2ScriptingEnvironment::GetStringListsFromTable(const std::string &table_name)
 
     auto &context = GetSol2Context();
     BOOST_ASSERT(context.state.lua_state() != nullptr);
-    if (!context.profile_table[table_name])
-    {
-        return string_lists;
-    }
-    sol::table table = context.profile_table[table_name];
-    if (!table.valid())
+    sol::optional<sol::table> table = context.profile_table[table_name];
+    if (!table || !table->valid())
     {
         return string_lists;
     }
 
-    for (const auto &pair : table)
+    for (const auto &pair : *table)
     {
         sol::table inner_table = pair.second;
         if (!inner_table.valid())
@@ -1191,14 +1183,14 @@ void LuaScriptingContext::ProcessNode(const osmium::Node &node,
     {
     case 4:
     case 3:
-        node_function(profile_table, node, result, relations);
+        node_function(profile_table, std::cref(node), result, relations);
         break;
     case 2:
-        node_function(profile_table, node, result);
+        node_function(profile_table, std::cref(node), result);
         break;
     case 1:
     case 0:
-        node_function(node, result);
+        node_function(std::cref(node), result);
         break;
     }
 }
@@ -1213,14 +1205,14 @@ void LuaScriptingContext::ProcessWay(const osmium::Way &way,
     {
     case 4:
     case 3:
-        way_function(profile_table, way, result, relations);
+        way_function(profile_table, std::cref(way), std::ref(result), std::cref(relations));
         break;
     case 2:
-        way_function(profile_table, way, result);
+        way_function(profile_table, std::cref(way), std::ref(result));
         break;
     case 1:
     case 0:
-        way_function(way, result);
+        way_function(std::cref(way), std::ref(result));
         break;
     }
 }

third_party/sol2/sol/protect.hpp → third_party/sol2-3.3.0/include/sol/config.hpp

@@ -1,8 +1,6 @@
-// sol2 
-
 // The MIT License (MIT)
 
-// Copyright (c) 2013-2018 Rapptz, ThePhD and contributors
+// Copyright (c) 2013-2020 Rapptz, ThePhD and contributors
 
 // 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
@@ -21,34 +19,35 @@
 // 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 SOL_PROTECT_HPP
-#define SOL_PROTECT_HPP
+// This file was generated with a script.
+// Generated 2022-06-25 08:14:19.336233 UTC
+// This header was generated with sol v3.3.0 (revision eba86625)
+// https://github.com/ThePhD/sol2
+
+#ifndef SOL_SINGLE_CONFIG_HPP
+#define SOL_SINGLE_CONFIG_HPP
+
+// beginning of sol/config.hpp
+
+/* Base, empty configuration file!
 
-#include "traits.hpp"
-#include <utility>
+     To override, place a file in your include paths of the form:
 
-namespace sol {
+. (your include path here)
+| sol (directory, or equivalent)
+  | config.hpp (your config.hpp file)
 
-	template <typename T>
-	struct protect_t {
-		T value;
+     So that when sol2 includes the file
 
-		template <typename Arg, typename... Args, meta::disable<std::is_same<protect_t, meta::unqualified_t<Arg>>> = meta::enabler>
-		protect_t(Arg&& arg, Args&&... args)
-		: value(std::forward<Arg>(arg), std::forward<Args>(args)...) {
-		}
+#include <sol/config.hpp>
 
-		protect_t(const protect_t&) = default;
-		protect_t(protect_t&&) = default;
-		protect_t& operator=(const protect_t&) = default;
-		protect_t& operator=(protect_t&&) = default;
-	};
+     it gives you the configuration values you desire. Configuration values can be
+seen in the safety.rst of the doc/src, or at
+https://sol2.readthedocs.io/en/latest/safety.html ! You can also pass them through
+the build system, or the command line options of your compiler.
 
-	template <typename T>
-	auto protect(T&& value) {
-		return protect_t<std::decay_t<T>>(std::forward<T>(value));
-	}
+*/
 
-} // namespace sol
+// end of sol/config.hpp
 
-#endif // SOL_PROTECT_HPP
+#endif // SOL_SINGLE_CONFIG_HPP