From 5aba5f78bbb38324e7f896f2a65e1a8d49421449 Mon Sep 17 00:00:00 2001
From: mrboring <mrboring@users.noreply.github.com>
Date: Thu, 7 Aug 2025 13:41:01 +0100
Subject: [PATCH] Added missing ZeroOrOne

---
 src/FSharp.SystemCommandLine/Inputs.fs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/FSharp.SystemCommandLine/Inputs.fs b/src/FSharp.SystemCommandLine/Inputs.fs
index 57aacd7..d4d05b1 100644
--- a/src/FSharp.SystemCommandLine/Inputs.fs
+++ b/src/FSharp.SystemCommandLine/Inputs.fs
@@ -71,6 +71,7 @@ type Arity =
     static member inline op_Implicit(argumentArity: ArgumentArity) : Arity = 
         match argumentArity.MinimumNumberOfValues, argumentArity.MaximumNumberOfValues with
         | 0, 0 -> Zero
+        | 0, 1 -> ZeroOrOne
         | 0, max when max = 100_000 -> ZeroOrMore
         | min, max when min = max -> ExactlyOne
         | min, max when min = 1 && max = 100_000 -> OneOrMore