*: add `explicit`

31 files changed, 32 insertions, 32 deletions

diff --git a/src/archive/plugins/Iso9660ArchivePlugin.cxx b/src/archive/plugins/Iso9660ArchivePlugin.cxx
index 2a63b2505..eb76cc228 100644
--- a/src/archive/plugins/Iso9660ArchivePlugin.cxx
+++ b/src/archive/plugins/Iso9660ArchivePlugin.cxx
@@ -62,7 +62,7 @@ class Iso9660ArchiveFile final : public ArchiveFile {
 	std::shared_ptr<Iso9660> iso;
 
 public:
-	Iso9660ArchiveFile(std::shared_ptr<Iso9660> &&_iso)
+	explicit Iso9660ArchiveFile(std::shared_ptr<Iso9660> &&_iso)
 		:iso(std::move(_iso)) {}
 
 	/**
diff --git a/src/archive/plugins/ZzipArchivePlugin.cxx b/src/archive/plugins/ZzipArchivePlugin.cxx
index 7b60ab36f..bb1776379 100644
--- a/src/archive/plugins/ZzipArchivePlugin.cxx
+++ b/src/archive/plugins/ZzipArchivePlugin.cxx
@@ -54,7 +54,7 @@ class ZzipArchiveFile final : public ArchiveFile {
 	std::shared_ptr<ZzipDir> dir;
 
 public:
-	ZzipArchiveFile(std::shared_ptr<ZzipDir> &&_dir)
+	explicit ZzipArchiveFile(std::shared_ptr<ZzipDir> &&_dir)
 		:dir(std::move(_dir)) {}
 
 	void Visit(ArchiveVisitor &visitor) override;
diff --git a/src/db/plugins/upnp/Directory.cxx b/src/db/plugins/upnp/Directory.cxx
index 4678bee00..de344cba3 100644
--- a/src/db/plugins/upnp/Directory.cxx
+++ b/src/db/plugins/upnp/Directory.cxx
@@ -111,7 +111,7 @@ class UPnPDirParser final : public CommonExpatParser {
 	TagBuilder tag;
 
 public:
-	UPnPDirParser(UPnPDirContent &_directory)
+	explicit UPnPDirParser(UPnPDirContent &_directory)
 		:directory(_directory),
 		 state(NONE),
 		 tag_type(TAG_NUM_OF_ITEM_TYPES)
diff --git a/src/encoder/plugins/FlacEncoderPlugin.cxx b/src/encoder/plugins/FlacEncoderPlugin.cxx
index 6123082e1..a433b6188 100644
--- a/src/encoder/plugins/FlacEncoderPlugin.cxx
+++ b/src/encoder/plugins/FlacEncoderPlugin.cxx
@@ -82,7 +82,7 @@ class PreparedFlacEncoder final : public PreparedEncoder {
 	const unsigned compression;
 
 public:
-	PreparedFlacEncoder(const ConfigBlock &block);
+	explicit PreparedFlacEncoder(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedEncoder */
 	Encoder *Open(AudioFormat &audio_format) override;
diff --git a/src/encoder/plugins/LameEncoderPlugin.cxx b/src/encoder/plugins/LameEncoderPlugin.cxx
index 6b06d2ad6..b4b05e81c 100644
--- a/src/encoder/plugins/LameEncoderPlugin.cxx
+++ b/src/encoder/plugins/LameEncoderPlugin.cxx
@@ -57,7 +57,7 @@ class PreparedLameEncoder final : public PreparedEncoder {
 	int bitrate;
 
 public:
-	PreparedLameEncoder(const ConfigBlock &block);
+	explicit PreparedLameEncoder(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedEncoder */
 	Encoder *Open(AudioFormat &audio_format) override;
diff --git a/src/encoder/plugins/OpusEncoderPlugin.cxx b/src/encoder/plugins/OpusEncoderPlugin.cxx
index 233f03799..c445feeba 100644
--- a/src/encoder/plugins/OpusEncoderPlugin.cxx
+++ b/src/encoder/plugins/OpusEncoderPlugin.cxx
@@ -79,7 +79,7 @@ class PreparedOpusEncoder final : public PreparedEncoder {
 	const bool chaining;
 
 public:
-	PreparedOpusEncoder(const ConfigBlock &block);
+	explicit PreparedOpusEncoder(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedEncoder */
 	Encoder *Open(AudioFormat &audio_format) override;
diff --git a/src/encoder/plugins/ShineEncoderPlugin.cxx b/src/encoder/plugins/ShineEncoderPlugin.cxx
index 93c9c9ed5..6eb7b0a79 100644
--- a/src/encoder/plugins/ShineEncoderPlugin.cxx
+++ b/src/encoder/plugins/ShineEncoderPlugin.cxx
@@ -86,7 +86,7 @@ class PreparedShineEncoder final : public PreparedEncoder {
 	shine_config_t config;
 
 public:
-	PreparedShineEncoder(const ConfigBlock &block);
+	explicit PreparedShineEncoder(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedEncoder */
 	Encoder *Open(AudioFormat &audio_format) override;
diff --git a/src/encoder/plugins/TwolameEncoderPlugin.cxx b/src/encoder/plugins/TwolameEncoderPlugin.cxx
index 7952f12c7..6620cdc27 100644
--- a/src/encoder/plugins/TwolameEncoderPlugin.cxx
+++ b/src/encoder/plugins/TwolameEncoderPlugin.cxx
@@ -73,7 +73,7 @@ class PreparedTwolameEncoder final : public PreparedEncoder {
 	int bitrate;
 
 public:
-	PreparedTwolameEncoder(const ConfigBlock &block);
+	explicit PreparedTwolameEncoder(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedEncoder */
 	Encoder *Open(AudioFormat &audio_format) override;
diff --git a/src/encoder/plugins/VorbisEncoderPlugin.cxx b/src/encoder/plugins/VorbisEncoderPlugin.cxx
index a213dd781..eb387384b 100644
--- a/src/encoder/plugins/VorbisEncoderPlugin.cxx
+++ b/src/encoder/plugins/VorbisEncoderPlugin.cxx
@@ -65,7 +65,7 @@ class PreparedVorbisEncoder final : public PreparedEncoder {
 	int bitrate;
 
 public:
-	PreparedVorbisEncoder(const ConfigBlock &block);
+	explicit PreparedVorbisEncoder(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedEncoder */
 	Encoder *Open(AudioFormat &audio_format) override;
diff --git a/src/encoder/plugins/WaveEncoderPlugin.cxx b/src/encoder/plugins/WaveEncoderPlugin.cxx
index 77b172990..626972f2f 100644
--- a/src/encoder/plugins/WaveEncoderPlugin.cxx
+++ b/src/encoder/plugins/WaveEncoderPlugin.cxx
@@ -33,7 +33,7 @@ class WaveEncoder final : public Encoder {
 	DynamicFifoBuffer<uint8_t> buffer;
 
 public:
-	WaveEncoder(AudioFormat &audio_format) noexcept;
+	explicit WaveEncoder(AudioFormat &audio_format) noexcept;
 
 	/* virtual methods from class Encoder */
 	void Write(const void *data, size_t length) override;
diff --git a/src/event/SignalMonitor.cxx b/src/event/SignalMonitor.cxx
index 5d2bc7f65..236f19d03 100644
--- a/src/event/SignalMonitor.cxx
+++ b/src/event/SignalMonitor.cxx
@@ -53,7 +53,7 @@ class SignalMonitor final : private SocketMonitor {
 #endif
 
 public:
-	SignalMonitor(EventLoop &_loop)
+	explicit SignalMonitor(EventLoop &_loop)
 		:SocketMonitor(_loop) {
 #ifndef USE_SIGNALFD
 		SocketMonitor::Open(SocketDescriptor(fd.Get()));
diff --git a/src/filter/plugins/AutoConvertFilterPlugin.cxx b/src/filter/plugins/AutoConvertFilterPlugin.cxx
index 24f267ce8..cf6786c92 100644
--- a/src/filter/plugins/AutoConvertFilterPlugin.cxx
+++ b/src/filter/plugins/AutoConvertFilterPlugin.cxx
@@ -64,7 +64,7 @@ class PreparedAutoConvertFilter final : public PreparedFilter {
 	std::unique_ptr<PreparedFilter> filter;
 
 public:
-	PreparedAutoConvertFilter(std::unique_ptr<PreparedFilter> _filter) noexcept
+	explicit PreparedAutoConvertFilter(std::unique_ptr<PreparedFilter> _filter) noexcept
 		:filter(std::move(_filter)) {}
 
 	std::unique_ptr<Filter> Open(AudioFormat &af) override;
diff --git a/src/filter/plugins/ConvertFilterPlugin.cxx b/src/filter/plugins/ConvertFilterPlugin.cxx
index 28f35e03a..15c3ae0a6 100644
--- a/src/filter/plugins/ConvertFilterPlugin.cxx
+++ b/src/filter/plugins/ConvertFilterPlugin.cxx
@@ -42,7 +42,7 @@ class ConvertFilter final : public Filter {
 	std::unique_ptr<PcmConvert> state;
 
 public:
-	ConvertFilter(const AudioFormat &audio_format);
+	explicit ConvertFilter(const AudioFormat &audio_format);
 
 	void Set(const AudioFormat &_out_audio_format);
 
diff --git a/src/filter/plugins/NormalizeFilterPlugin.cxx b/src/filter/plugins/NormalizeFilterPlugin.cxx
index a8cf182cd..b4e0b444b 100644
--- a/src/filter/plugins/NormalizeFilterPlugin.cxx
+++ b/src/filter/plugins/NormalizeFilterPlugin.cxx
@@ -34,7 +34,7 @@ class NormalizeFilter final : public Filter {
 	PcmBuffer buffer;
 
 public:
-	NormalizeFilter(const AudioFormat &audio_format)
+	explicit NormalizeFilter(const AudioFormat &audio_format)
 		:Filter(audio_format), compressor(Compressor_new(0)) {
 	}
 
diff --git a/src/filter/plugins/RouteFilterPlugin.cxx b/src/filter/plugins/RouteFilterPlugin.cxx
index 15cf522e3..66fac1e1a 100644
--- a/src/filter/plugins/RouteFilterPlugin.cxx
+++ b/src/filter/plugins/RouteFilterPlugin.cxx
@@ -130,7 +130,7 @@ public:
 	 * @param block the configuration block to read
 	 * @param filter a route_filter whose min_channels and sources[] to set
 	 */
-	PreparedRouteFilter(const ConfigBlock &block);
+	explicit PreparedRouteFilter(const ConfigBlock &block);
 
 	/* virtual methods from class PreparedFilter */
 	std::unique_ptr<Filter> Open(AudioFormat &af) override;
diff --git a/src/input/plugins/AlsaInputPlugin.cxx b/src/input/plugins/AlsaInputPlugin.cxx
index aee525cc6..7b384b3a8 100644
--- a/src/input/plugins/AlsaInputPlugin.cxx
+++ b/src/input/plugins/AlsaInputPlugin.cxx
@@ -139,7 +139,7 @@ class AlsaInputStream::SourceSpec {
 	DivideString components;
 
 public:
-	SourceSpec(const char *_uri)
+	explicit SourceSpec(const char *_uri)
 		: uri(_uri)
 		, components(uri, '?')
 	{
diff --git a/src/lib/upnp/Device.cxx b/src/lib/upnp/Device.cxx
index 23827f025..37a39686d 100644
--- a/src/lib/upnp/Device.cxx
+++ b/src/lib/upnp/Device.cxx
@@ -40,7 +40,7 @@ class UPnPDeviceParser final : public CommonExpatParser {
 	UPnPService m_tservice;
 
 public:
-	UPnPDeviceParser(UPnPDevice& device)
+	explicit UPnPDeviceParser(UPnPDevice& device)
 		:m_device(device),
 		 value(nullptr) {}
 
diff --git a/src/mixer/plugins/NullMixerPlugin.cxx b/src/mixer/plugins/NullMixerPlugin.cxx
index 5a5f5f352..4f8989d50 100644
--- a/src/mixer/plugins/NullMixerPlugin.cxx
+++ b/src/mixer/plugins/NullMixerPlugin.cxx
@@ -26,7 +26,7 @@ class NullMixer final : public Mixer {
 	unsigned volume;
 
 public:
-	NullMixer(MixerListener &_listener)
+	explicit NullMixer(MixerListener &_listener)
 		:Mixer(null_mixer_plugin, _listener),
 		 volume(100)
 	{
diff --git a/src/mixer/plugins/SoftwareMixerPlugin.cxx b/src/mixer/plugins/SoftwareMixerPlugin.cxx
index a78ddd6f9..c394a9628 100644
--- a/src/mixer/plugins/SoftwareMixerPlugin.cxx
+++ b/src/mixer/plugins/SoftwareMixerPlugin.cxx
@@ -34,7 +34,7 @@ class SoftwareMixer final : public Mixer {
 	unsigned volume = 100;
 
 public:
-	SoftwareMixer(MixerListener &_listener)
+	explicit SoftwareMixer(MixerListener &_listener)
 		:Mixer(software_mixer_plugin, _listener)
 	{
 	}
diff --git a/src/neighbor/plugins/SmbclientNeighborPlugin.cxx b/src/neighbor/plugins/SmbclientNeighborPlugin.cxx
index 2d59d56d1..805799d91 100644
--- a/src/neighbor/plugins/SmbclientNeighborPlugin.cxx
+++ b/src/neighbor/plugins/SmbclientNeighborPlugin.cxx
@@ -66,7 +66,7 @@ class SmbclientNeighborExplorer final : public NeighborExplorer {
 	bool quit;
 
 public:
-	SmbclientNeighborExplorer(NeighborListener &_listener) noexcept
+	explicit SmbclientNeighborExplorer(NeighborListener &_listener) noexcept
 		:NeighborExplorer(_listener),
 		 thread(BIND_THIS_METHOD(ThreadFunc)) {}
 
diff --git a/src/output/plugins/AoOutputPlugin.cxx b/src/output/plugins/AoOutputPlugin.cxx
index 187c164b6..ec700d607 100644
--- a/src/output/plugins/AoOutputPlugin.cxx
+++ b/src/output/plugins/AoOutputPlugin.cxx
@@ -52,7 +52,7 @@ class AoOutput final : AudioOutput, SafeSingleton<AoInit> {
 
 	size_t frame_size;
 
-	AoOutput(const ConfigBlock &block);
+	explicit AoOutput(const ConfigBlock &block);
 	~AoOutput() override;
 
 public:
diff --git a/src/output/plugins/FifoOutputPlugin.cxx b/src/output/plugins/FifoOutputPlugin.cxx
index 8e49d7216..4eb6ccafa 100644
--- a/src/output/plugins/FifoOutputPlugin.cxx
+++ b/src/output/plugins/FifoOutputPlugin.cxx
@@ -42,7 +42,7 @@ class FifoOutput final : AudioOutput {
 	Timer *timer;
 
 public:
-	FifoOutput(const ConfigBlock &block);
+	explicit FifoOutput(const ConfigBlock &block);
 
 	~FifoOutput() override {
 		CloseFifo();
diff --git a/src/output/plugins/NullOutputPlugin.cxx b/src/output/plugins/NullOutputPlugin.cxx
index 712dcf6f9..02cd01f91 100644
--- a/src/output/plugins/NullOutputPlugin.cxx
+++ b/src/output/plugins/NullOutputPlugin.cxx
@@ -27,7 +27,7 @@ class NullOutput final  : AudioOutput {
 	Timer *timer;
 
 public:
-	NullOutput(const ConfigBlock &block)
+	explicit NullOutput(const ConfigBlock &block)
 		:AudioOutput(0),
 		 sync(block.GetBlockValue("sync", true)) {}
 
diff --git a/src/output/plugins/OpenALOutputPlugin.cxx b/src/output/plugins/OpenALOutputPlugin.cxx
index faf6019d0..55c797b6f 100644
--- a/src/output/plugins/OpenALOutputPlugin.cxx
+++ b/src/output/plugins/OpenALOutputPlugin.cxx
@@ -44,7 +44,7 @@ class OpenALOutput final : AudioOutput {
 	ALenum format;
 	ALuint frequency;
 
-	OpenALOutput(const ConfigBlock &block);
+	explicit OpenALOutput(const ConfigBlock &block);
 
 public:
 	static AudioOutput *Create(EventLoop &,
diff --git a/src/output/plugins/PipeOutputPlugin.cxx b/src/output/plugins/PipeOutputPlugin.cxx
index 099bfeb09..62e01be1e 100644
--- a/src/output/plugins/PipeOutputPlugin.cxx
+++ b/src/output/plugins/PipeOutputPlugin.cxx
@@ -30,7 +30,7 @@ class PipeOutput final : AudioOutput {
 	const std::string cmd;
 	FILE *fh;
 
-	PipeOutput(const ConfigBlock &block);
+	explicit PipeOutput(const ConfigBlock &block);
 
 public:
 	static AudioOutput *Create(EventLoop &,
diff --git a/src/output/plugins/RecorderOutputPlugin.cxx b/src/output/plugins/RecorderOutputPlugin.cxx
index 77fd709a5..590ecec58 100644
--- a/src/output/plugins/RecorderOutputPlugin.cxx
+++ b/src/output/plugins/RecorderOutputPlugin.cxx
@@ -67,7 +67,7 @@ class RecorderOutput final : AudioOutput {
 	 */
 	FileOutputStream *file;
 
-	RecorderOutput(const ConfigBlock &block);
+	explicit RecorderOutput(const ConfigBlock &block);
 
 public:
 	static AudioOutput *Create(EventLoop &, const ConfigBlock &block) {
diff --git a/src/pcm/PcmFormat.cxx b/src/pcm/PcmFormat.cxx
index 943438790..5aa28db26 100644
--- a/src/pcm/PcmFormat.cxx
+++ b/src/pcm/PcmFormat.cxx
@@ -53,7 +53,7 @@ struct Convert24To16 {
 
 	PcmDither &dither;
 
-	Convert24To16(PcmDither &_dither):dither(_dither) {}
+	explicit Convert24To16(PcmDither &_dither):dither(_dither) {}
 
 	void Convert(int16_t *out, const int32_t *in, size_t n) {
 		dither.Dither24To16(out, in, in + n);
@@ -66,7 +66,7 @@ struct Convert32To16 {
 
 	PcmDither &dither;
 
-	Convert32To16(PcmDither &_dither):dither(_dither) {}
+	explicit Convert32To16(PcmDither &_dither):dither(_dither) {}
 
 	void Convert(int16_t *out, const int32_t *in, size_t n) {
 		dither.Dither32To16(out, in, in + n);
diff --git a/src/playlist/plugins/CuePlaylistPlugin.cxx b/src/playlist/plugins/CuePlaylistPlugin.cxx
index 3740b231b..d263e0190 100644
--- a/src/playlist/plugins/CuePlaylistPlugin.cxx
+++ b/src/playlist/plugins/CuePlaylistPlugin.cxx
@@ -28,7 +28,7 @@ class CuePlaylist final : public SongEnumerator {
 	CueParser parser;
 
  public:
-	CuePlaylist(InputStreamPtr &&is)
+	explicit CuePlaylist(InputStreamPtr &&is)
 		:tis(std::move(is)) {
 	}
 
diff --git a/src/playlist/plugins/ExtM3uPlaylistPlugin.cxx b/src/playlist/plugins/ExtM3uPlaylistPlugin.cxx
index 447d01852..0088c0d13 100644
--- a/src/playlist/plugins/ExtM3uPlaylistPlugin.cxx
+++ b/src/playlist/plugins/ExtM3uPlaylistPlugin.cxx
@@ -35,7 +35,7 @@ class ExtM3uPlaylist final : public SongEnumerator {
 	TextInputStream tis;
 
 public:
-	ExtM3uPlaylist(InputStreamPtr &&is)
+	explicit ExtM3uPlaylist(InputStreamPtr &&is)
 		:tis(std::move(is)) {
 	}
 
diff --git a/src/playlist/plugins/M3uPlaylistPlugin.cxx b/src/playlist/plugins/M3uPlaylistPlugin.cxx
index a5d5c77e1..6f4b34f92 100644
--- a/src/playlist/plugins/M3uPlaylistPlugin.cxx
+++ b/src/playlist/plugins/M3uPlaylistPlugin.cxx
@@ -28,7 +28,7 @@ class M3uPlaylist final : public SongEnumerator {
 	TextInputStream tis;
 
 public:
-	M3uPlaylist(InputStreamPtr &&is)
+	explicit M3uPlaylist(InputStreamPtr &&is)
 		:tis(std::move(is)) {
 	}
 
diff --git a/src/storage/plugins/LocalStorage.cxx b/src/storage/plugins/LocalStorage.cxx
index eac054745..2663c63ef 100644
--- a/src/storage/plugins/LocalStorage.cxx
+++ b/src/storage/plugins/LocalStorage.cxx
@@ -36,7 +36,7 @@ class LocalDirectoryReader final : public StorageDirectoryReader {
 	std::string name_utf8;
 
 public:
-	LocalDirectoryReader(AllocatedPath &&_base_fs)
+	explicit LocalDirectoryReader(AllocatedPath &&_base_fs)
 		:base_fs(std::move(_base_fs)), reader(base_fs) {}
 
 	/* virtual methods from class StorageDirectoryReader */