Sort inferred relations to keep generated operators in a consistent o…

…rder

CodeGen/Generators/QuantityRelationsParser.cs

@@ -60,6 +60,9 @@ public static void ParseAndApplyRelations(string rootDir, Quantity[] quantities)
                 .Select(r => r with { RightQuantity = timeSpanQuantity })
                 .ToList());
 
+            // Sort all relations to keep generated operators in a consistent order.
+            relations.Sort();
+
             foreach (var quantity in quantities)
             {
                 var quantityRelations = new List<QuantityRelation>();

CodeGen/JsonTypes/QuantityRelation.cs

@@ -1,9 +1,11 @@
 // Licensed under MIT No Attribution, see LICENSE file at the root.
 // Copyright 2013 Andreas Gullberg Larsen ([email protected]). Maintained at https://github.com/angularsen/UnitsNet.
 
+using System;
+
 namespace CodeGen.JsonTypes
 {
-    internal record QuantityRelation
+    internal record QuantityRelation : IComparable<QuantityRelation>
     {
         public string Operator = null!;
 
@@ -15,5 +17,18 @@ internal record QuantityRelation
 
         public Quantity ResultQuantity = null!;
         public Unit ResultUnit = null!;
+
+        private string SortString => ResultQuantity.Name
+                                     + ResultUnit.SingularName
+                                     + LeftQuantity.Name
+                                     + LeftUnit.SingularName
+                                     + Operator
+                                     + RightQuantity.Name
+                                     + RightUnit.SingularName;
+
+        public int CompareTo(QuantityRelation? other)
+        {
+            return string.Compare(SortString, other?.SortString, StringComparison.Ordinal);
+        }
     }
 }