From 1420a4060edad6fd0f414cf373754449a97df485 Mon Sep 17 00:00:00 2001
From: Tom Scheler <tom.scheler@web.de>
Date: Mon, 2 Oct 2023 15:42:54 +0200
Subject: [PATCH] Add missing struct contraint to `Matches<PATTERN>`

---
 LanguageExt.Core/Class Instances/Pred/String/Predicates.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/LanguageExt.Core/Class Instances/Pred/String/Predicates.cs b/LanguageExt.Core/Class Instances/Pred/String/Predicates.cs
index 1965dccf9..9e849b74f 100644
--- a/LanguageExt.Core/Class Instances/Pred/String/Predicates.cs	
+++ b/LanguageExt.Core/Class Instances/Pred/String/Predicates.cs	
@@ -17,7 +17,7 @@ public bool True(string value) =>
     }
 
     public struct Matches<PATTERN> : Pred<string>
-    where PATTERN : Const<string>
+    where PATTERN : struct, Const<string>
     {
         public static readonly Matches<PATTERN> Is = default;