TagFile: add "noexcept"

src/TagFile.cxx

@@ -46,16 +46,16 @@ class TagFileScan {
 
 public:
 	TagFileScan(Path _path_fs, const char *_suffix,
-		    const TagHandler &_handler, void *_handler_ctx)
+		    const TagHandler &_handler, void *_handler_ctx) noexcept
 		:path_fs(_path_fs), suffix(_suffix),
 		 handler(_handler), handler_ctx(_handler_ctx) ,
 		 is(nullptr) {}
 
-	bool ScanFile(const DecoderPlugin &plugin) {
+	bool ScanFile(const DecoderPlugin &plugin) noexcept {
 		return plugin.ScanFile(path_fs, handler, handler_ctx);
 	}
 
-	bool ScanStream(const DecoderPlugin &plugin) {
+	bool ScanStream(const DecoderPlugin &plugin) noexcept {
 		if (plugin.scan_stream == nullptr)
 			return false;
 
@@ -78,14 +78,15 @@ public:
 		return plugin.ScanStream(*is, handler, handler_ctx);
 	}
 
-	bool Scan(const DecoderPlugin &plugin) {
+	bool Scan(const DecoderPlugin &plugin) noexcept {
 		return plugin.SupportsSuffix(suffix) &&
 			(ScanFile(plugin) || ScanStream(plugin));
 	}
 };
 
 bool
-tag_file_scan(Path path_fs, const TagHandler &handler, void *handler_ctx)
+tag_file_scan(Path path_fs,
+	      const TagHandler &handler, void *handler_ctx) noexcept
 {
 	assert(!path_fs.IsNull());
 
@@ -104,7 +105,7 @@ tag_file_scan(Path path_fs, const TagHandler &handler, void *handler_ctx)
 }
 
 bool
-tag_file_scan(Path path, TagBuilder &builder)
+tag_file_scan(Path path, TagBuilder &builder) noexcept
 {
 	if (!tag_file_scan(path, full_tag_handler, &builder))
 		return false;

src/TagFile.hxx

@@ -34,7 +34,8 @@ class TagBuilder;
  * found)
  */
 bool
-tag_file_scan(Path path, const TagHandler &handler, void *handler_ctx);
+tag_file_scan(Path path,
+	      const TagHandler &handler, void *handler_ctx) noexcept;
 
 /**
  * Scan the tags of a song file.  Invokes matching decoder plugins,
@@ -45,6 +46,6 @@ tag_file_scan(Path path, const TagHandler &handler, void *handler_ctx);
  * found)
  */
 bool
-tag_file_scan(Path path, TagBuilder &builder);
+tag_file_scan(Path path, TagBuilder &builder) noexcept;
 
 #endif