Merge pull request #2607 from coldays/add_modulo_opeator

Added missing modulo operator to BsonValue

Author: JKamsker

LiteDB.Tests/Expressions/Expressions_Exec_Tests.cs

@@ -104,6 +104,19 @@ BsonValue S(string s, params BsonValue[] args)
                 return BsonExpression.Create(s, args).ExecuteScalar(doc);
             }
 
+            // Arithmetic operators
+            doc = new BsonDocument();
+            // Int
+            S("6 + 3").ExpectValue(9);
+            S("6 * 3").ExpectValue(18);
+            S("6 % 3").ExpectValue(0);
+            S("6 / 3").ExpectValue(2);
+            // Double
+            S("6.0 + 3.0").ExpectValue(9);
+            S("6.0 * 3.0").ExpectValue(18);
+            S("6.0 % 3.0").ExpectValue(0);
+            S("6.0 / 3.0").ExpectValue(2);
+
             // Operators order
             doc = J("{ a: 1, b: 2, c: 3 }");
 

LiteDB/Document/BsonValue.cs

@@ -500,6 +500,17 @@ public static implicit operator BsonValue(DateTime value)
             return left.AsDouble / right.AsDouble;
         }
 
+        // %
+        public static BsonValue operator %(BsonValue left, BsonValue right)
+        {
+            if (!left.IsNumber || !right.IsNumber) return BsonValue.Null;
+            if (left.IsInt32 && right.IsInt32) return left.AsInt32 % right.AsInt32;
+            if (left.IsInt64 && right.IsInt64) return left.AsInt64 % right.AsInt64;
+            if (left.IsDecimal && right.IsDecimal) return left.AsDecimal % right.AsDecimal;
+
+            return left.AsDouble % right.AsDouble;
+        }
+
         public override string ToString()
         {
             return JsonSerializer.Serialize(this);