...

mcc/mcc_angle.h

@@ -598,4 +598,23 @@ static constexpr MccCoordPairKind MccCoordStrToPairKind(R&& spair)
 }
 
 
+std::string MccAngleFancyString(std::convertible_to<MccAngle> auto const& ang,
+                                std::format_string<double> val_fmt = "{}")
+{
+    std::string s;
+
+    if (ang < 1.0_arcmins) {
+        std::format_to(std::back_inserter(s), val_fmt, MccAngle{ang}.arcsecs());
+        s += " arcsecs";
+    } else if (ang < 1.0_degs) {
+        std::format_to(std::back_inserter(s), val_fmt, MccAngle{ang}.arcmins());
+        s += " arcmins";
+    } else {
+        std::format_to(std::back_inserter(s), val_fmt, MccAngle{ang}.degrees());
+        s += " degs";
+    }
+
+    return s;
+}
+
 }  // namespace mcc