1 files changed, 7 insertions, 0 deletions
diff --git a/src/commodity.h b/src/commodity.h
index 1d69b689..82efac6a 100644
--- a/src/commodity.h
+++ b/src/commodity.h
@@ -351,6 +351,13 @@ inline std::ostream& operator<<(std::ostream& out, const commodity_t& comm) {
 void put_commodity(property_tree::ptree& pt, const commodity_t& comm,
                    bool commodity_details = false);
 
+//simple struct to allow std::map to compare commodities names
+struct commodity_compare {
+  bool operator() (const commodity_t* lhs, const commodity_t* rhs){
+    return (lhs->symbol().compare(rhs->symbol()) < 0);
+  }
+};
+
 } // namespace ledger
 
 #endif // _COMMODITY_H