Re: Optional and NotNull version 0.5.0 - swift optional like and scala option like
On Monday, 20 August 2018 at 19:06:36 UTC, Seb wrote: [snip] That looks pretty cool! I added optional to run.dlang.io (e.g. https://run.dlang.io/is/912kVG) and the project tester (https://github.com/dlang/ci/pull/288). It's interesting that both sumtype and optional have match templates. Maybe scope to combine these projects?
Re: Optional and NotNull version 0.5.0 - swift optional like and scala option like
On Thursday, 16 August 2018 at 12:25:14 UTC, aliak wrote: Hi See: https://optional.dub.pm [...] That looks pretty cool! I added optional to run.dlang.io (e.g. https://run.dlang.io/is/912kVG) and the project tester (https://github.com/dlang/ci/pull/288).
Re: Beta 2.082.0
On Friday, 17 August 2018 at 20:01:32 UTC, Martin Nowak wrote: Glad to announce the first beta for the 2.082.0 release, ♥ to the 47 contributors for this release. [snip] On the "UDAs on function arguments are now supported" part of the change log, just to be clear, @(22) is added to "a" for the purposes of the test function. The variable need not have @22 outside of the function, correct?
DIP Draft Reviews
I'm getting ready to start prepping one of the DIPs in the PR queue for community review. It proposes adding an `in` operator for arrays. I haven't gone through it in detail yet, so I invite anyone with time on their hands to provide feedback on the Draft so we can more speedily get in shape to kick off the big-league reviews. https://github.com/dlang/DIPs/pull/101 While you're at it, feel free to poke around and leave some feedback on other drafts in the queue.
Re: D kernel for Jupyter notebook
On 08/20/2018 02:14 AM, Shigeki Karita wrote: > On Sunday, 19 August 2018 at 20:33:45 UTC, Laeeth Isharc wrote: >> Proof of concept works, but it requires some further development to be >> useful to do work in. >> >> [...] > > Great. I have tried DUB integration. It seems to work. > https://github.com/ShigekiKarita/grain/blob/master/example/repl.d Looks very interesting, though not quite ready for full drepl integration. https://github.com/dlang-community/drepl/issues/4#issuecomment-414331125
Mini numerical optimizer in D
Mini numerical optimizer in D:
https://github.com/S6Regen/Dopt
I also have this Walsh Hadamard code in D for Linux AMD 64:
// Linux AMD64
extern(C) void hsixteen(float* x,ulong n,float scale){
asm{
naked;
shufps XMM0,XMM0,0;
align 16;
h16:
sub RSI,16;
movups XMM1,[RDI];
movups XMM2,[RDI+16];
movups XMM3,[RDI+2*16];
movups XMM4,[RDI+3*16];
movups XMM5,XMM1;
movups XMM6,XMM3;
haddps XMM1,XMM2;
haddps XMM3,XMM4;
hsubps XMM5,XMM2;
hsubps XMM6,XMM4;
movups XMM2,XMM1;
movups XMM4,XMM3;
haddps XMM1,XMM5;
haddps XMM3,XMM6;
hsubps XMM2,XMM5;
hsubps XMM4,XMM6;
movups XMM5,XMM1;
movups XMM6,XMM3;
haddps XMM1,XMM2;
haddps XMM3,XMM4;
hsubps XMM5,XMM2;
hsubps XMM6,XMM4;
movups XMM2,XMM1;
movups XMM4,XMM5;
addps XMM1,XMM3;
addps XMM5,XMM6;
subps XMM2,XMM3;
subps XMM4,XMM6;
mulps XMM1,XMM0;
mulps XMM5,XMM0;
mulps XMM2,XMM0;
mulps XMM4,XMM0;
movups [RDI],XMM1;
movups [RDI+16],XMM5;
movups [RDI+2*16],XMM2;
movups [RDI+3*16],XMM4;
lea RDI,[RDI+64];
jnz h16;
ret;
}
}
extern(C) void hgap(float* x,ulong gap,ulong n){
asm{
naked;
mov RCX,RSI;
lea R8,[RDI+4*RSI];
shr RDX,1;
align 16;
hgaploop:
sub RCX,16;
movups XMM0,[RDI];
movups XMM1,[RDI+16];
movups XMM2,[RDI+2*16];
movups XMM3,[RDI+3*16];
movups XMM8,[R8];
movups XMM9,[R8+16];
movups XMM10,[R8+2*16];
movups XMM11,[R8+3*16];
movups XMM4,XMM0;
movups XMM5,XMM1;
movups XMM6,XMM2;
movups XMM7,XMM3;
addps XMM0,XMM8;
addps XMM1,XMM9;
addps XMM2,XMM10;
addps XMM3,XMM11;
subps XMM4,XMM8;
subps XMM5,XMM9;
subps XMM6,XMM10;
subps XMM7,XMM11;
movups [RDI],XMM0;
movups [RDI+16],XMM1;
movups [RDI+2*16],XMM2;
movups [RDI+3*16],XMM3;
movups [R8],XMM4;
movups [R8+16],XMM5;
movups [R8+2*16],XMM6;
movups [R8+3*16],XMM7;
lea RDI,[RDI+64];
lea R8,[R8+64];
jnz hgaploop;
sub RDX,RSI;
mov RCX,RSI;
mov RDI,R8;
lea R8,[R8+4*RSI];
jnz hgaploop;
ret;
}
}
void wht(float[] vec){
const ulong lim=8192;
const ulong n=vec.length;
ulong gap,k;
float scale=1f/sqrt(to!float(n));
k=n;
if( k>lim) k=lim;
for(ulong i=0;iIt is the simplest algorithm in computer science least known, as
I like to say.
It actually has many uses. Eg.
https://github.com/FALCONN-LIB/FFHT
Re: Optional and NotNull version 0.5.0 - swift optional like and scala option like
On Monday, 20 August 2018 at 09:16:18 UTC, ikod wrote:
On Thursday, 16 August 2018 at 16:20:09 UTC, aliak wrote:
On Thursday, 16 August 2018 at 12:25:14 UTC, aliak wrote:
It's also @nogc and @safe
No it's not. Not dispatching at least. Dunno why though. Seems
safey is because taking an address. Nogc will have to look in
to.
Hello!
please, help, how can I use match in @nogc code:
import optional;
void main() @nogc {
Optional!int i = 1;
bool b = true;
i.match!(
(v) => b,
() => false
);
}
fails to compile:
source/app.d(3,6): Error: function `D main` is @nogc yet
allocates closures with the GC
source/app.d(7,9):app.main.__lambda1 closes over
variable b at source/app.d(5,10)
Thanks!
Hi, it's because the lambda "(v) => b" allocates. Same would
happen with any other function that takes an alias to a lambda
and that lambda causes a closure allocation.
Changing this to "(int v) => b" seems to make the compiler infer
@nogc though and it compiles.
But it's still a delegate, so I'm not sure why that works and not
sure in which situations D infers a nogc delegate.
The same thing does not work for algorithm.map for e.g.
Cheers
- Ali
Re: Optional and NotNull version 0.5.0 - swift optional like and scala option like
On Thursday, 16 August 2018 at 16:20:09 UTC, aliak wrote:
On Thursday, 16 August 2018 at 12:25:14 UTC, aliak wrote:
It's also @nogc and @safe
No it's not. Not dispatching at least. Dunno why though. Seems
safey is because taking an address. Nogc will have to look in
to.
Hello!
please, help, how can I use match in @nogc code:
import optional;
void main() @nogc {
Optional!int i = 1;
bool b = true;
i.match!(
(v) => b,
() => false
);
}
fails to compile:
source/app.d(3,6): Error: function `D main` is @nogc yet
allocates closures with the GC
source/app.d(7,9):app.main.__lambda1 closes over variable
b at source/app.d(5,10)
Thanks!
