const and immutable member variables in classes

[Ali Çehreli via Digitalmars-d-learn]

On 02/02/2016 07:05 PM, Jonathan M Davis via Digitalmars-d-learn wrote:

 > Well, in principle, if you have a member that's going to be 
initialized on
 > construction and then never mutated, having it be const or immutable 
would
 > be desirable,

That's how I've seen it used in a friend's code. Makes sense to me as 
long as it's not a struct.

 > but for all of the reasons that you're listing, to do so with
 > structs is ultimately a bad idea.

Agreed.

 > But under normal
 > circumstances, member variables of classes don't have that problem, 
because
 > you don't normally ever try to overwrite the state of the whole class
 > object.

Exactly my point.

 > I usually tell folks not to do it because of
 > all of the problems it causes.

That's been my guideline: "const and immutable members should be 
avoided." Now I'm tempted to add this: "only in structs."

Ali