Issue 17712: Add toChars workaround for toImpl

https://issues.dlang.org/show_bug.cgi?id=17712#c11

Author: ntrel

std/conv.d

@@ -1435,8 +1435,10 @@ do
     switch (radix)
     {
         case 10:
+            // workaround https://issues.dlang.org/show_bug.cgi?id=17712#c12
+            enum ten = 10;
             // The (value+0) is so integral promotions happen to the type
-            return toChars!(10, EEType)(value + 0).array;
+            return toChars!(ten, EEType)(value + 0).array;
         case 16:
             // The unsigned(unsigned(value)+0) is so unsigned integral promotions happen to the type
             if (letterCase == letterCase.upper)
@@ -6282,8 +6284,8 @@ private auto hexStrLiteral(String)(scope String hexData)
  * Returns:
  *      Random access range with slicing and everything
  */
-
-auto toChars(ubyte radix = 10, Char = char, LetterCase letterCase = LetterCase.lower, T)(T value)
+// radix was ubyte, changed to workaround https://issues.dlang.org/show_bug.cgi?id=17712#c11
+auto toChars(alias radix = 10, Char = char, LetterCase letterCase = LetterCase.lower, T)(T value)
     pure nothrow @nogc @safe
 if ((radix == 2 || radix == 8 || radix == 10 || radix == 16) &&
     (is(Unqual!T == uint) || is(Unqual!T == ulong) ||