From b57c582f7a9afaea181b5d2a2d3f6f30576770f7 Mon Sep 17 00:00:00 2001
From: rameel <rameel-b@hotmail.com>
Date: Fri, 9 Oct 2026 19:33:26 +0500
Subject: [PATCH] literals: reject binary BigInteger literals on net8.0

BigInteger does not support NumberStyles.BinaryNumber on net8.0.

Throw an ArgumentException when Number<BigInteger> is called with
NumberKind.BinaryNumber.
---
 src/Ramstack.Parsing/Literal.Number.cs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Ramstack.Parsing/Literal.Number.cs b/src/Ramstack.Parsing/Literal.Number.cs
index d3f8283..73ccc86 100644
--- a/src/Ramstack.Parsing/Literal.Number.cs
+++ b/src/Ramstack.Parsing/Literal.Number.cs
@@ -68,7 +68,16 @@ public static Parser<T> Number<T>(string? name, NumberKind kind = NumberKind.Aut
 
             #if NET8_0_OR_GREATER
             if (kind == NumberKind.BinaryNumber)
+            {
+                #if NET8_0
+                if (typeof(T) == typeof(BigInteger))
+                    throw new ArgumentException(
+                        $"Number kind {kind} is not supported for BigInteger.",
+                        nameof(kind));
+                #endif
+
                 return new NumberLiteral<T, BinaryNumberLiteralKind>(name ?? "binary number", NumberStyles.BinaryNumber);
+            }
             #endif
 
             throw new ArgumentException(