cast to unsigned: no check required

Author: denizzzka

std/conv.d

@@ -5585,7 +5585,7 @@ if (isIntegral!T && isOutputRange!(W, char))
     else
     {
         UnsignedStringBuf buf = void;
-        put(writer, unsignedToTempString(value.unsigned, buf));
+        put(writer, unsignedToTempString(cast(Unsigned!T)value, buf));
     }
 }
 
@@ -6105,10 +6105,11 @@ if ((radix == 2 || radix == 8 || radix == 10 || radix == 16) &&
             void initialize(UT value)
             {
                 import core.internal.string : signedToTempString, unsignedToTempString;
+                Unsigned!T
 
                 char[] t = value < 0
                     ?   signedToTempString!(10, false, char)(value, buf)
-                    : unsignedToTempString!(10, false, char)(value.unsigned, buf);
+                    : unsignedToTempString!(10, false, char)(cast(Unsigned!UT)value, buf);
 
                 lwr = cast(uint) (buf.length - t.length);
                 upr = cast(uint) buf.length;