Purity

[bearophile]

Bruno Medeiros:

> Hum, it might still be useful to have something like a compiler switch 
> that disables pure altogether, then people could use I/O and other 
> non-pure operations for debugging purposes. One could wrap such code 
> with a version statement:
> 
> void myPurefunc(Foo foo) pure {
>    version(pure_disabled) {
>      writeln("some debug info: ", foo);
>    }
>    //...

This seems an interesting idea to help debug pure functions.

Bye,
bearophile