Showing with 1 addition and 1 deletion.

+1 −1 std/math.d
diff --git a/std/math.d b/std/math.d
@@ -5140,7 +5140,7 @@ bool isInfinity(X)(X x) @nogc @trusted pure nothrow
     }
     else
     {
-        return (x - 1) == x;
+        return (x < -X.max) || (X.max < x);
     }
 }
-Original file line number
+Diff line change
@@ Expand Up / @@ -5140,7 +5140,7 @@ bool isInfinity(X)(X x) @nogc @trusted pure nothrow @@
         }
         else
         {
-            return (x - 1) == x;
+            return (x < -X.max) || (X.max < x);
         }
     }
@@ Expand Down @@