On Tuesday, 18 July 2017 at 12:39:01 UTC, Stefan Koch wrote:
whhhahhh template bloat
Yes, and also very slow. :)
On Tuesday, 18 July 2017 at 08:46:50 UTC, Jack Applegame wrote:
On Monday, 17 July 2017 at 17:38:23 UTC, Nordlöw wrote:
I'm want to define a specialization of `append()` that takes
only static arrays as inputs and returns a static array being
the sum of the lengths of the inputs.
Have anybody
On Tuesday, 18 July 2017 at 08:07:45 UTC, Jacob Carlborg wrote:
append - add array or element to existing array
concat (concatenate) - add to arrays (or element) together to
create a new array
Seems like this is a concatenation. But please avoid shortening
the names. I vote you go with "conca
On Monday, 17 July 2017 at 17:38:23 UTC, Nordlöw wrote:
I'm want to define a specialization of `append()` that takes
only static arrays as inputs and returns a static array being
the sum of the lengths of the inputs.
Have anybody already implemented this?
If not, I'm specifically interested i
On 2017-07-17 22:11, Nordlöw wrote:
- under what name: append, concat or cat?
append - add array or element to existing array
concat (concatenate) - add to arrays (or element) together to create a
new array
Seems like this is a concatenation. But please avoid shortening the
names. I vote y
On Mon, Jul 17, 2017 at 10:32:14PM +, Nordlöw via Digitalmars-d-learn wrote:
> On Monday, 17 July 2017 at 20:01:41 UTC, H. S. Teoh wrote:
[...]
> > result[offset .. offset + a.length] = a[];
>
> This slice assignment doesn't support conversion between different
> element-ty
On Monday, 17 July 2017 at 20:28:12 UTC, Nordlöw wrote:
Made some adjustments with working unittest and put it up on
https://github.com/nordlow/phobos-next/blob/master/src/algorithm_ex.d#L2467
Moved here
https://github.com/nordlow/phobos-next/blob/master/src/array_ex.d#L2765
On Monday, 17 July 2017 at 20:01:41 UTC, H. S. Teoh wrote:
OK, here's an actual, compilable, runnable version:
import std.algorithm : sum;
import std.meta : allSatisfy, staticMap;
import std.range : only;
import std.traits : CommonType, isStaticArray;
ali
On Monday, 17 July 2017 at 20:53:36 UTC, H. S. Teoh wrote:
See the working implementation in my latest post on this
thread. That version supports CommonType, and works correctly
with empty tuples as well.
T
Thanks.
On Mon, Jul 17, 2017 at 08:28:12PM +, Nordlöw via Digitalmars-d-learn wrote:
[...]
> I had to special-case foreach body for `i == 0` since `sumOfLengths`
> couldn't instantiate with empty tuple `()`.
>
> Further, should `concat` support `CommonType`? That is, should
>
> int[2] x = [1, 2];
On Monday, 17 July 2017 at 20:10:31 UTC, H. S. Teoh wrote:
On Mon, Jul 17, 2017 at 08:11:03PM +, Nordlöw via
Digitalmars-d-learn wrote: [...]
Does this have a place in Phobos?
Never know till you try. :-D
If so,
- under what name: append, concat or cat?
I'd vote for concat.
- wher
On Mon, Jul 17, 2017 at 08:11:03PM +, Nordlöw via Digitalmars-d-learn wrote:
[...]
> Does this have a place in Phobos?
Never know till you try. :-D
> If so,
>
> - under what name: append, concat or cat?
I'd vote for concat.
> - where: std.algorithm or std.array?
std.array, IMO, since it
On Monday, 17 July 2017 at 19:11:26 UTC, H. S. Teoh wrote:
Hmm, since we already have sumOfLengths available at
compile-time, what about:
T[sumOfLengths!StaticArrays]
append(StaticArrays...)(StaticArrays arrays)
if (allSatisfy!(isStaticArray, StaticArrays))
{
OK, here's an actual, compilable, runnable version:
import std.algorithm : sum;
import std.meta : allSatisfy, staticMap;
import std.range : only;
import std.traits : CommonType, isStaticArray;
alias Elem(A : E[n], E, size_t n) = E;
enum Length(A) =
On Monday, 17 July 2017 at 18:54:31 UTC, Stefan Koch wrote:
we have special code in the compiler to optimize a ~ b ~ c.
Interesting, can you elaborate on what you mean with "optimize".
In that case, is there a reason why
int x[2];
int y[2];
int z[x.length + y.length] = x ~ y;
isn
On Monday, 17 July 2017 at 18:54:31 UTC, Stefan Koch wrote:
So all you need to do make it so
auto cat(T[]...)(T args)
{
T[] result;
mixin(() {
string mix = `result = `;
foreach(i;args.length)
{
mix ~= `args[` ~ itos(i) ~ `] ~`;
}
mix[$-1] = ';';
On Mon, Jul 17, 2017 at 12:01:48PM -0700, H. S. Teoh via Digitalmars-d-learn
wrote:
[...]
> template sumOfLengths(A...)
> if (A.length > 0)
> {
> static if (A.length == 1)
> enum sumOfLengths = A[0].length;
> else
>
On Mon, Jul 17, 2017 at 12:01:48PM -0700, H. S. Teoh via Digitalmars-d-learn
wrote:
[...]
> T[sumOfLengths!StaticArrays] append(StaticArrays...)(StaticArrays
> arrays)
> if (/* insert static array constraints here */)
> {
> typeof(return) result = void;
>
On Mon, Jul 17, 2017 at 05:38:23PM +, Nordlöw via Digitalmars-d-learn wrote:
> I'm want to define a specialization of `append()` that takes only
> static arrays as inputs and returns a static array being the sum of
> the lengths of the inputs.
>
> Have anybody already implemented this?
>
> If
On 07/17/2017 08:35 PM, Nordlöw wrote:
Thanks, but I'm talking about the variadic case where the number of
input arguments are unknown (>= 2) where the function header looks
something like
import std.traits : allSatisfy, isStaticArray;
auto append(R, Args...)(auto ref Args args)
if (args
On Monday, 17 July 2017 at 18:38:16 UTC, Nordlöw wrote:
On Monday, 17 July 2017 at 17:46:42 UTC, ag0aep6g wrote:
int[n + m] result = a ~ b;
Further, the expression `a ~ b` here will allocate and create a
copy on the GC-heap before writing `result`.
Maybe LDC optimizes away this now or i
On Monday, 17 July 2017 at 17:38:23 UTC, Nordlöw wrote:
I'm want to define a specialization of `append()` that takes
only static arrays as inputs and returns a static array being
the sum of the lengths of the inputs.
Have anybody already implemented this?
If not, I'm specifically interested i
On Monday, 17 July 2017 at 17:46:42 UTC, ag0aep6g wrote:
int[n + m] result = a ~ b;
Further, the expression `a ~ b` here will allocate and create a
copy on the GC-heap before writing `result`.
Maybe LDC optimizes away this now or in the future but DMD cannot.
Yeah I know, kind of dumb b
On Monday, 17 July 2017 at 17:46:42 UTC, ag0aep6g wrote:
Like so?
int[n + m] append(size_t n, size_t m)(int[n] a, int[m] b)
{
int[n + m] result = a ~ b;
return result;
}
Thanks, but I'm talking about the variadic case where the number
of input arguments are unknown (>= 2) where the fu
On 07/17/2017 07:38 PM, Nordlöw wrote:
I'm want to define a specialization of `append()` that takes only static
arrays as inputs and returns a static array being the sum of the lengths
of the inputs.
Have anybody already implemented this?
If not, I'm specifically interested in how to most con
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