On 9 April 2013 20:50, Timon Gehr <timon.gehr@gmx.ch> wrote:

On 04/09/2013 12:28 PM, Manu wrote:

...

There's nothing 'pure' about a function that has side effects.

If it has the same side effects every time it is called with the same arguments, then there is something pure about it.

But it doesn't. It could do anything when called a second time, same arguments or not.

The only thing it can't do is escape a variable. That sounds more like 'scope' to me than 'pure'.