Use SyntaxFacts.IsHexDigit instead of custom hex digit validator in…

… lexer (#68016)
dotnet · May 10, 2023 · 7eeb7ce · 7eeb7ce
1 parent f47ff93
commit 7eeb7ce
Showing 1 changed file with 1 addition and 11 deletions.
diff --git a/src/Compilers/CSharp/Portable/Parser/Lexer.cs b/src/Compilers/CSharp/Portable/Parser/Lexer.cs
@@ -1932,7 +1932,7 @@ private bool ScanIdentifier_SlowPath(ref TokenInfo info)
                     Debug.Assert(string.Equals(info.Text.Substring(0, objectAddressOffset + 1), "@0x", StringComparison.OrdinalIgnoreCase));
                     var valueText = TextWindow.Intern(_identBuffer, objectAddressOffset, _identLen - objectAddressOffset);
                     // Verify valid hex value.
-                    if ((valueText.Length == 0) || !valueText.All(IsValidHexDigit))
+                    if ((valueText.Length == 0) || !valueText.All(SyntaxFacts.IsHexDigit))
                     {
                         goto Fail;
                     }
@@ -1955,16 +1955,6 @@ private bool ScanIdentifier_SlowPath(ref TokenInfo info)
             return false;
         }
 
-        private static bool IsValidHexDigit(char c)
-        {
-            if ((c >= '0') && (c <= '9'))
-            {
-                return true;
-            }
-            c = char.ToLower(c);
-            return (c >= 'a') && (c <= 'f');
-        }
-
         /// <summary>
         /// This method is essentially the same as ScanIdentifier_SlowPath,
         /// except that it can handle XML entities.  Since ScanIdentifier