any news on const/invariant?
Walter Bright
newshound1 at digitalmars.com
Wed Nov 28 21:02:29 PST 2007
Steven Schveighoffer wrote:
> "Derek Parnell" wrote
>> Also, what is the syntax now for declaring a const function that returns a
>> const value?
>
> const const(int)* f(){ ... }
> or
> const(int)* f() const { ... }
>
> This REALLY REALLY needs an example in the docs. Walter, please do
> something about this. The const void f() example doesn't cut it, especially
> for C++ defectors. I had to ask this question a while back in the learn NG
> after carefully examining the docs :)
>
> Also, will the following compile?
Yes.
> const int* f1() const {...}
A const function returning an int*. The const here is just redundant.
> invariant int* f2() const {...}
An invariant function returning an int*. The invariant overrides the const.
> And if they do, what do they mean?
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