Add common char sets

Author: sebastienros

src/Parlot/Character.Class.cs

@@ -0,0 +1,17 @@
+namespace Parlot;
+
+public static partial class Character
+{
+    public const string DecimalDigits = "0123456789";
+    public const string HexDigits = "0123456789abcdefABCDEF";
+    public const string OctalDigits = "01234567";
+    public const string BinaryDigits = "01";
+
+    public const string AZLower = "abcdefghijklmnopqrstuvwxyz";
+    public const string AZUpper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+    public const string AZ = AZLower + AZUpper;
+    public const string AlphaNumeric = AZ + DecimalDigits;
+    public const string DefaultIdentifierStart = "$_" + AZ;
+    public const string DefaultIdentifierPart = "$_" + AZ;
+    public const string NewLines = "\n\r\v";
+}

src/Parlot/Character.SearchValues.cs

@@ -6,14 +6,6 @@ namespace Parlot;
 
 public static partial class Character
 {
-    internal const string DecimalDigits = "0123456789";
-    internal const string Alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
-    internal const string AlphaNumeric = Alpha + DecimalDigits;
-    internal const string DefaultIdentifierStart = "$_" + Alpha;
-    internal const string DefaultIdentifierPart = "$_" + AlphaNumeric;
-    internal const string HexDigits = "0123456789abcdefABCDEF";
-    internal const string NewLines = "\n\r\v";
-
     internal static readonly SearchValues<char> _decimalDigits = SearchValues.Create(DecimalDigits);
     internal static readonly SearchValues<char> _hexDigits = SearchValues.Create(HexDigits);
     internal static readonly SearchValues<char> _identifierStart = SearchValues.Create(DefaultIdentifierStart);