From 203e8c4ddb08171663cc137df80af099ece3db77 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Simon=20L=C3=BCbe=C3=9F?= <simon.luebess@gmail.com>
Date: Mon, 18 Dec 2023 01:43:02 +0100
Subject: [PATCH] ScriptCore: Generate GetHashCode for Vectors

Fixes warnings
---
 ScriptCoreGenerator/VectorGenerator.cs | 27 ++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/ScriptCoreGenerator/VectorGenerator.cs b/ScriptCoreGenerator/VectorGenerator.cs
index 81e17cc..434b9ea 100644
--- a/ScriptCoreGenerator/VectorGenerator.cs
+++ b/ScriptCoreGenerator/VectorGenerator.cs
@@ -85,6 +85,7 @@ public class VectorGenerator : ISourceGenerator
             GenerateEqualityOperators(vector, builder);
 
             GenerateEquals(vector, builder);
+            GenerateGetHashCode(vector, builder);
 
             if (receiver.ComparableReceiver.ComparableVectors.Contains(vector.VectorName))
             {
@@ -132,6 +133,32 @@ public class VectorGenerator : ISourceGenerator
 
                          """);
     }
+
+    private void GenerateGetHashCode(VectorDefinition vector, StringBuilder builder)
+    {
+        builder.Append("""
+                           public override int GetHashCode()
+                           {
+                               // Unchecked to allow overflow
+                               unchecked
+                               {
+                                   int hash = 17;
+                       
+                       """);
+
+        for (int i = 0; i < vector.ComponentCount; i++)
+        {
+            builder.Append($"\t\t\thash = hash * 23 + {ComponentNames[i]}.GetHashCode();\n");
+        }
+
+        builder.Append("""
+                                     return hash;
+                                 }
+                             }
+
+
+                         """);
+    }
     
     private void GenerateToString(VectorDefinition vector, StringBuilder builder)
     {