On Tuesday, 29 January 2013 at 05:36:31 UTC, estew wrote:
Hi,
Just started in D a week back after years of C/C++ head bashing
and have to say language is fantastic.
I have a small misunderstanding regarding const...well ok, a
fundamental misunderstanding by the looks of it:)
class A
{
ulong[] values;
...
const ulong[] getValue() const {
return this.values;
}
}
But this fails to compile with the following message:
Error: cannot implicitly convert expression (this.values) of
type const(ulong[]) to ulong[]
I just do not see it in the code. The function is const, so
this.values is const, and I am just returning that as a const
ulong[]. Am I not???
I don't get it? Any help explaining why this does not compile
would be appreciated!
Hi,
This is a very common syntax trap where too many people fall.
When you do const ulong[] getValue() const both const are
qualifying this, and none the return value. So the error.
The correct declaration is :
const(ulong)[] getValue() const
or
const(ulong[]) getValue() const
I wish this syntax will be fixed, but I have no hope. We just
will see the problem popping again and again I guess.
