Using const to Enforce Design Decisions

[Walter Bright]

On 3/26/2019 12:57 AM, Marco de Wild wrote:
> I've also tried to use pure, but (ironically) I found it harder to use. I think 
> it's easier to understand when an object will be mutated or not than to predict 
> whether there are side effects.

Using pure is indeed hard. One has to make a change in how one thinks about 
programming to make good use of it, it can't just be schlepped on. But the 
results can be pretty cool.

Same with const.