On Thursday, 8 December 2016 at 23:08:35 UTC, Jonathan M Davis
wrote:
I've seen that in C++ code all the time, especially if you're
dealing with
smart pointers, because otherwise you have to do stuff like
(*iter)->foo()
instead of just var->foo().
Smart pointers weren't introduced until C++11
On Thursday, December 08, 2016 22:32:47 Jerry via Digitalmars-d-learn wrote:
> On Thursday, 8 December 2016 at 21:46:26 UTC, Jonathan M Davis
>
> wrote:
> > However, at least as of C++98, non-copyable elements in a
> > container were not allowed IIRC, so it would have been pretty
> > rare to have a
On Thursday, 8 December 2016 at 21:46:26 UTC, Jonathan M Davis
wrote:
However, at least as of C++98, non-copyable elements in a
container were not allowed IIRC, so it would have been pretty
rare to have a C++ iterator that returned a non-copyable value
when you dereferenced it.
Even if it was u
On Thursday, December 08, 2016 20:21:41 Jerry via Digitalmars-d-learn wrote:
> Assuming that is wrong though, as you aren't copying an iterator
> or range you are copying the actual value. What you are confusing
> "auto h = r.front;" for is this: "auto rcopy = r;". The D code
> "auto h = r.front" i
On Thursday, 8 December 2016 at 17:29:42 UTC, H. S. Teoh wrote:
The problem is that most range algorithms won't work if `auto h
= r.front;` doesn't compile. Random chunks of std.algorithm
won't work for such a range.
One may argue, of course, that std.algorithm ought to be
fixed... but the r
On Thu, Dec 08, 2016 at 05:22:25PM +, Jerry via Digitalmars-d-learn wrote:
> On Thursday, 8 December 2016 at 16:48:07 UTC, H. S. Teoh wrote:
> > On Thu, Dec 08, 2016 at 04:35:02PM +, Jerry via Digitalmars-d-learn
> > wrote:
> > > The problem is with how isInputRange is defined, requires tha
On Thursday, 8 December 2016 at 16:48:07 UTC, H. S. Teoh wrote:
On Thu, Dec 08, 2016 at 04:35:02PM +, Jerry via
Digitalmars-d-learn wrote:
The problem is with how isInputRange is defined, requires that
front be copyable.
auto h = r.front; // can get the front of the range
https://github.c
On Thu, Dec 08, 2016 at 04:35:02PM +, Jerry via Digitalmars-d-learn wrote:
> The problem is with how isInputRange is defined, requires that front
> be copyable.
>
> auto h = r.front; // can get the front of the range
>
> https://github.com/dlang/phobos/blob/v2.072.1/std/range/primitives.d#L16
The problem is with how isInputRange is defined, requires that
front be copyable.
auto h = r.front; // can get the front of the range
https://github.com/dlang/phobos/blob/v2.072.1/std/range/primitives.d#L168
It doesn't take into consideration that front exists and that
it's a reference to a s
Hi,
I am trying to create a range with uncopyable elements. My
thought process was the following:
1.I have created a struct :
struct S
{
int a;
@disable this(this);
}
2. I declared an array :
S[] arr = [S(1), S(2), S(3)];
expecting that arr will be a range like, for example, an in
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