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-rw-r--r--src/libutil/types.hh1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libutil/types.hh b/src/libutil/types.hh
index bea2673ca..00ba567c6 100644
--- a/src/libutil/types.hh
+++ b/src/libutil/types.hh
@@ -14,6 +14,7 @@ namespace nix {
typedef std::list<std::string> Strings;
typedef std::set<std::string> StringSet;
typedef std::map<std::string, std::string> StringMap;
+typedef std::map<std::string, std::string> StringPairs;
/* Paths are just strings. */
typedef std::string Path;