From 12ab91f55291d4b2bdde010447d5c77c95a5351d Mon Sep 17 00:00:00 2001
From: James Luck <james.luck@thetradedesk.com>
Date: Fri, 8 Apr 2022 15:51:53 +1000
Subject: [PATCH] Adding set to describe the binary arithmetic operators

---
 src/PromQL.Parser/Operators.cs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/PromQL.Parser/Operators.cs b/src/PromQL.Parser/Operators.cs
index 19bdae5..8e6182d 100644
--- a/src/PromQL.Parser/Operators.cs
+++ b/src/PromQL.Parser/Operators.cs
@@ -92,6 +92,20 @@ public enum Unary
             Binary.Eql,
             Binary.Neq
         }.ToImmutableHashSet();
+        
+        /// <summary>
+        /// The set of binary operations that are arithmetic operators. 
+        /// </summary>
+        /// <remarks>https://prometheus.io/docs/prometheus/latest/querying/operators/#arithmetic-binary-operators</remarks>
+        public static ImmutableHashSet<Binary> BinaryArithmeticOperators { get; set; }= new[]
+        {
+            Binary.Add,
+            Binary.Sub,
+            Binary.Mod,
+            Binary.Mul,
+            Binary.Div,
+            Binary.Pow
+        }.ToImmutableHashSet();
 
         /// <summary>
         /// Operators are ordered by highest -> lowest precedence.