Permutations: Difference between revisions

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@@ Line 852: / Line 852: @@
 [3, 2, 1]</pre>
 ===Lazy version===
-With same main function produces the same output:
+Compiled with <code>-version=permutations2_main</code> produces the same output:
-<lang d>import std.exception, std.bigint;
+<lang d>import std.algorithm, std.exception;
 struct Permutations(T) {
@@ Line 913: / Line 913: @@
     foreach (p; permutations([BigInt(1), BigInt(2), BigInt(3)]))
         assert((p[0] + 1) > 0);
+}
+version (permutations2_main) {
+    void main() {
+        import std.stdio;
+        foreach (p; permutations([1, 2, 3]))
+            writeln(p);
+    }
 }</lang>