Upgraded code to switch to C++17. Tested on Debian Buster

tools/metadata/LmsMetadata.cpp

@@ -1,4 +1,5 @@
 #include <chrono>
+#include <optional>
 #include <stdexcept>
 #include <stdlib.h>
 #include <iostream>
@@ -31,13 +32,13 @@ std::ostream& operator<<(std::ostream& os, const MetaData::Album& album)
 
 
 
-void parse(MetaData::Parser& parser, const boost::filesystem::path& file)
+void parse(MetaData::Parser& parser, const std::filesystem::path& file)
 {
 	using namespace MetaData;
 
 	parser.setClusterTypeNames( {"MOOD", "GENRE"} );
 
-	boost::optional<Track> track {parser.parse(file, true)};
+	std::optional<Track> track {parser.parse(file, true)};
 	if (!track)
 	{
 		std::cerr << "Parsing failed" << std::endl;
@@ -119,11 +120,9 @@ int main(int argc, char *argv[])
 
 	try
 	{
-		Av::AvInit();
-
 		for (std::size_t  i {}; i < static_cast<std::size_t>(argc - 1); ++i)
 		{
-			boost::filesystem::path file {argv[i + 1]};
+			std::filesystem::path file {argv[i + 1]};
 
 			std::cout << "Parsing file '" << file << "'" << std::endl;
 

tools/metadata/Makefile.am

@@ -8,5 +8,5 @@ lms_metadata_SOURCES = \
 	$(top_srcdir)/src/utils/Logger.cpp 		\
 	$(top_srcdir)/src/utils/Utils.cpp
 
-lms_metadata_CXXFLAGS=-std=c++14 -Wall -I$(top_srcdir)/src -D_REENTRANT
+lms_metadata_CXXFLAGS=-std=c++17 -I$(top_srcdir)/src -D_REENTRANT
 

tools/similarity/LmsSimilarity.cpp

@@ -1,11 +1,11 @@
-#include <stdlib.h>
-#include <stdexcept>
-#include <iostream>
-#include <string>
 #include <chrono>
-#include <random>
+#include <filesystem>
+#include <iostream>
+#include <stdexcept>
+#include <stdlib.h>
+#include <string>
 
-#include "database/Database.hpp"
+#include "database/Db.hpp"
 #include "database/Session.hpp"
 #include "database/Track.hpp"
 #include "database/Artist.hpp"
@@ -32,7 +32,7 @@ std::ostream& operator<<(std::ostream& os, const Database::Track::pointer& track
 
 static
 bool
-getTrackFeatures(Database::Session &session, const Database::Track::pointer& track, const std::map<std::string, std::size_t>& featuresSettings, SOM::InputVector& res)
+getTrackFeatures(Database::Session&, const Database::Track::pointer& track, const std::map<std::string, std::size_t>& featuresSettings, SOM::InputVector& res)
 {
 	std::map<std::string, std::vector<double>> features;
 	for (const auto& featureSettings : featuresSettings)
@@ -84,13 +84,13 @@ int main(int argc, char *argv[])
 		for (const auto& featureSettings : featuresSettings)
 			nbDims += featureSettings.second;
 
-		boost::filesystem::path configFilePath = "/etc/lms.conf";
+		std::filesystem::path configFilePath {"/etc/lms.conf"};
 		if (argc >= 2)
 			configFilePath = std::string(argv[1], 0, 256);
 
 		ServiceProvider<Config>::create(configFilePath);
 
-		Database::Database db {getService<Config>()->getPath("working-dir") / "lms.db"};
+		Database::Db db {getService<Config>()->getPath("working-dir") / "lms.db"};
 		auto session {db.createSession()};
 
 		std::cout << "Getting all features..." << std::endl;

tools/similarity/Makefile.am

@@ -4,7 +4,7 @@ lms_similarity_SOURCES = \
 	$(srcdir)/LmsSimilarity.cpp			\
 	$(top_srcdir)/src/database/Artist.cpp		\
 	$(top_srcdir)/src/database/Cluster.cpp		\
-	$(top_srcdir)/src/database/Database.cpp		\
+	$(top_srcdir)/src/database/Db.cpp		\
 	$(top_srcdir)/src/database/TrackFeatures.cpp	\
 	$(top_srcdir)/src/database/TrackList.cpp	\
 	$(top_srcdir)/src/database/Release.cpp		\
@@ -20,5 +20,5 @@ lms_similarity_SOURCES = \
 	$(top_srcdir)/src/utils/Logger.cpp 		\
 	$(top_srcdir)/src/utils/Utils.cpp
 
-lms_similarity_CXXFLAGS=-std=c++14 -Wall -I$(top_srcdir)/src -D_REENTRANT
+lms_similarity_CXXFLAGS=-std=c++17 -I$(top_srcdir)/src -D_REENTRANT