On 4/1/15 2:46 PM, Dzugaru wrote:
On Wednesday, 1 April 2015 at 18:37:24 UTC, Ali Çehreli wrote:
On 04/01/2015 11:27 AM, Dzugaru wrote:
> This code does work when you provide second (non-default)
argument to
> function, and doesn't if you do not (no way it can deduce E
solely from
> checks I as
On Wednesday, 1 April 2015 at 18:37:24 UTC, Ali Çehreli wrote:
On 04/01/2015 11:27 AM, Dzugaru wrote:
> This code does work when you provide second (non-default)
argument to
> function, and doesn't if you do not (no way it can deduce E
solely from
> checks I assume).
>
> My version, in constract
On Wednesday, 1 April 2015 at 18:20:41 UTC, Dzugaru wrote:
a)
isn't this almost, if not exactly, the same as
std.algorithm.reduce?
b)
you can write nice things like this:
auto min = [2,4,1,3,5].aggregate!((a, b) => a < b ? a :
b)(int.max);
c)
the deduction failure looks like a bug to me, p
On 04/01/2015 11:27 AM, Dzugaru wrote:
> This code does work when you provide second (non-default) argument to
> function, and doesn't if you do not (no way it can deduce E solely from
> checks I assume).
>
> My version, in constract, works when you do not provide second argument
> and doesn't if
On Wednesday, 1 April 2015 at 18:13:15 UTC, Ali Çehreli wrote:
On 04/01/2015 10:57 AM, Dzugaru wrote:
> ElementType!S aggregate(alias func, S)(S list, ElementType!S
accum =
> ElementType!S.init)
> if(is(typeof(func(accum, accum)) == typeof(accum))) {
[...]
> }
I can't explain exactly why that d
a)
isn't this almost, if not exactly, the same as
std.algorithm.reduce?
b)
you can write nice things like this:
auto min = [2,4,1,3,5].aggregate!((a, b) => a < b ? a :
b)(int.max);
c)
the deduction failure looks like a bug to me, perhaps there is
a good reason why it can't work in the gene
On Wednesday, 1 April 2015 at 18:13:15 UTC, Ali Çehreli wrote:
On 04/01/2015 10:57 AM, Dzugaru wrote:
> ElementType!S aggregate(alias func, S)(S list, ElementType!S
accum =
> ElementType!S.init)
> if(is(typeof(func(accum, accum)) == typeof(accum))) {
[...]
> }
I can't explain exactly why that d
On 04/01/2015 11:15 AM, John Colvin wrote:
>> Instead of using
>> ElementType!S in the parameter list, introduce a third one (E), which
>> you check in the template constraint:
>>
>> ElementType!S aggregate(alias func, S, E)(S list, E accum = E.init)
>> if(is (E == ElementType!S) &&
On 04/01/2015 10:57 AM, Dzugaru wrote:
> ElementType!S aggregate(alias func, S)(S list, ElementType!S accum =
> ElementType!S.init)
> if(is(typeof(func(accum, accum)) == typeof(accum))) {
[...]
> }
I can't explain exactly why that doesn't work.
However, I've discovered a number of times that re
On Wednesday, 1 April 2015 at 17:57:12 UTC, Dzugaru wrote:
Following recent IRC discussion.
I want to write a generic list aggregate function that works
with builtin types like int[] as well as custom classes/structs
that define front, empty, popFront:
import std.range;
ElementType!S aggreg
Following recent IRC discussion.
I want to write a generic list aggregate function that works with
builtin types like int[] as well as custom classes/structs that
define front, empty, popFront:
import std.range;
ElementType!S aggregate(alias func, S)(S list, ElementType!S
accum = ElementTyp
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