From 7f043367ed0d4470e5e1b59ba8d8ab75aec618ad Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Sun, 1 Sep 2019 14:55:25 +0200
Subject: [PATCH] db/UniqueTags: add API documentation

---
 src/db/UniqueTags.hxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/db/UniqueTags.hxx b/src/db/UniqueTags.hxx
index d2a7eb734..8f26d4bb4 100644
--- a/src/db/UniqueTags.hxx
+++ b/src/db/UniqueTags.hxx
@@ -29,6 +29,9 @@ struct DatabaseSelection;
 template<typename Key> class RecursiveMap;
 template<typename T> struct ConstBuffer;
 
+/**
+ * Walk the database and collect unique tag values.
+ */
 RecursiveMap<std::string>
 CollectUniqueTags(const Database &db, const DatabaseSelection &selection,
 		  ConstBuffer<TagType> tag_types);