✨ support net8.0

Author: bert2

Json5.Tests/Json5.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>

Json5/Internal/NumberParser.cs

@@ -73,9 +73,28 @@ public static BigInteger ParseHexNum(NumberLiteral nl) {
     public static BigInteger ParseBinNum(NumberLiteral nl) {
         var s = nl.HasMinusSign || nl.HasPlusSign ? nl.String[3..] : nl.String[2..];
         var sign = nl.HasMinusSign ? -1 : 1;
+#if NET9_0_OR_GREATER
         // Prepend 0 so the most significant bit is never set and the result will always be positive.
         return BigInteger.TryParse('0' + s, NumberStyles.AllowBinarySpecifier, Culture, out var val)
             ? sign * val
             : throw new NotSupportedException($"Format of the number literal {nl.String} is not supported.");
+#else
+        return sign * Chunk(s.AsMemory(), size: 128).Aggregate(
+            BigInteger.Zero,
+            (bigInt, chunk) => (bigInt << chunk.Length) + ParseChunk(chunk));
+
+        UInt128 ParseChunk(ReadOnlyMemory<char> chunk)
+            => UInt128.TryParse(chunk.Span, NumberStyles.AllowBinarySpecifier, Culture, out var v)
+                ? v
+                : throw new NotSupportedException($"Format of the number literal {nl.String} is not supported.");
+
+        static IEnumerable<ReadOnlyMemory<char>> Chunk(ReadOnlyMemory<char> source, int size) {
+            for (var i = 0; i < source.Length; i += size) {
+                yield return i + size < source.Length
+                    ? source.Slice(i, length: size)
+                    : source[i..];
+            }
+        }
+#endif
     }
 }

Json5/Json5.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <GenerateDocumentationFile>True</GenerateDocumentationFile>

Json5/Microsoft.Extensions.Configuration/Json5ConfigExtensions.cs

@@ -118,4 +118,9 @@ static bool IsMainAppSettings(IConfigurationSource s)
         bool IsEnvAppSettings(IConfigurationSource s)
             => ((JsonConfigurationSource)s).Path == $"appsettings.{builder.Environment.EnvironmentName}.json";
     }
+
+#if !NET9_0_OR_GREATER
+    private static IEnumerable<(int Index, TSource Item)> Index<TSource>(this IEnumerable<TSource> source)
+        => source.Select((x, i) => (i, x));
+#endif
 }