Re: Three Cool Things about D

[Rory McGuire via Digitalmars-d-announce]

On Mon, Dec 28, 2015 at 5:24 PM, Rory McGuire  wrote:

>
> On 27 Dec 2015 6:25 PM, "Andrei Alexandrescu via Digitalmars-d-announce" <
> digitalmars-d-announce@puremagic.com> wrote:
> >
> > On 12/27/15 1:27 AM, Rory McGuire via Digitalmars-d-announce wrote:
> [snip]
> >> Vibe.d had a template engine called diet which is almost like Jade. It
> >> is also completed so you might prefer that as an example.
> >
> >
> > Either or both would be awesome to express with Pegged. -- Andrei
> >
>
> I'm working on the output part now while it's the holidays. Will share
> once I've got my test template translating to html as a demo.
>
A little teaser, this is the output of the app and runtime and/or compile
time:
Index of
Demobody {
margin: 0px;
background-color: #eee;
} This is the index.jade
paragraph thattest continues on multiplelines goto https://github.com/jadejs/jade/blob/master/docs/views/reference/interpolation.jade;>Jade
Reference  to see examples of interpolationas2dfas3dfas3dfThis is the text in footer
blockYou are logged in3:
three2: two1:
one123you have 42
friendsfoobarbazfoobarbazcatdogpigHello worldNo content
providedHello worldThis is myAmazing
articlefoofoo1234If you take a
look at this page's source https://github.com/jadejs/jade/blob/master/docs/views/reference/interpolation.jade;>on
GitHub, you'll see several places where the tag interpolation operator
is used like so. .quote // this is raw text so the .quote means nothing to
jade, only string and tag interpolation works here p Joel:
riskyThis is supposed to just be text inside a p
tag.This is NOT MY INSIDE VOICE - upper case
characters

Translated from these files:
*=*
extends second_layout.jade

block title
title Index of Demo

block content
// this is the actual displayed content
p(id="", p-form-hook=some_d_var ? "yes" :"no", marked) This is the
index.jade #[i paragraph] that
| #[b test] continues #[i on] multiple
| lines goto #[a(target="_blank", href="
https://github.com/jadejs/jade/blob/master/docs/views/reference/interpolation.jade;)
Jade Reference]
// TODO: should allow empty lines in PipedText or at least show an error
//|
| to see examples of interpolation
ul(isit=some_other_d_var == "woot")
li.one-css.two-css: a(href!="#"): a(href!="#")!= clickme2
.img-holder
img.image(src="logo2.gif", style={background: "red", padding: "0px"})/
**
extends second_layout.jade

block title
title Index of Demo

block content
// this is the actual displayed content
p(id="", p-form-hook=some_d_var ? "yes" :"no", marked) This is the
index.jade #[i paragraph] that
| #[b test] continues #[i on] multiple
| lines goto #[a(target="_blank", href="
https://github.com/jadejs/jade/blob/master/docs/views/reference/interpolation.jade;)
Jade Reference]
// TODO: should allow empty lines in PipedText or at least show an error
//|
| to see examples of interpolation
ul(isit=some_other_d_var == "woot")
li.one-css.two-css: a(href!="#"): a(href!="#")!= clickme2
.img-holder
img.image(src="logo2.gif", style={background: "red", padding: "0px"})/
rmcguire@rmcguire-hx:~/Projects/jade$ cat views/second_layout.jade
extends base_layout.jade
block footer
p This is the text in footer block
*===*
doctype html
- auto currentUrl = "/";
- auto riskyBusiness = "risky";

- bool some_d_var = true;
- string some_other_d_var = "woot";
html(lang="en")
head
block title
title Page Title Here
style
include style.css
body.base-css(ng-app="MyApp", ng-controller="CtrlII")
block content
// this is the displayed content
p(id="", p-form-hook=some_d_var ? "yes" :"no", marked) This is a paragraph
| That continues on
| multiple lines
ul(isit=some_other_d_var == "woot")
li.one-css.two-css: a(href!="#"): a(href!="#")!= clickme
.img-holder
img.image(src="logo.gif", style={background: "red", padding: "0px"})/
woot#content1 as2df
#woot2(class=["c1", "c2"]) as3dfas3df
woot3(class={active: currentUrl == "/about"})
block footer
p Placeholder footer block
- var host = "remotehost";
- var user = var.emptyObject;
if "localhost" == host
div#foo(data-bar="foo", goot-one)({"data-cew": "baer",
"ng-show": 1234})
//- include:markdown ./includes/footer.jade
else
merrrt
unless user.isAnonymous
p You are logged in
//- :markdown
//- ### Markdown Need dedent support to parse this
//- I often like including markdown documents.
ul
- import std.conv;
each index, val in [1:"one",2:"two",3:"three"]
li= to!string(index) ~": "~ val
- int n=1;
while n < 4
li= n++

- auto friends = 42;
case friends
when 0
when 1
p you have very few friends
default: p you have #{friends} friends
//- Declaration
mixin list
ul
li foo
li bar
li baz
//- Use
+list
+list
mixin pet(name)
li.pet= name
ul
+pet("cat")
+pet("dog")
+pet("pig")
mixin article(title)
.article
.article-wrapper
h1= title
if block
block
else
p No content provided

+article("Hello world")

+article("Hello world")
p This is my
p Amazing article
mixin link(href, name)
//- attributes == {class: 

Re: Three Cool Things about D

[Jack Stouffer via Digitalmars-d-announce]

On Friday, 8 January 2016 at 00:32:05 UTC, Rory McGuire wrote:
On Mon, Dec 28, 2015 at 5:24 PM, Rory McGuire 
 wrote:




On 27 Dec 2015 6:25 PM, "Andrei Alexandrescu via 
Digitalmars-d-announce" < 
digitalmars-d-announce@puremagic.com> wrote:

>
> On 12/27/15 1:27 AM, Rory McGuire via Digitalmars-d-announce 
> wrote:

[snip]
>> Vibe.d had a template engine called diet which is almost 
>> like Jade. It is also completed so you might prefer that as 
>> an example.

>
>
> Either or both would be awesome to express with Pegged. -- 
> Andrei

>

I'm working on the output part now while it's the holidays. 
Will share once I've got my test template translating to html 
as a demo.



A little teaser, this is the output of the app and runtime


Can you post all of the D code on github as well, seeing as the 
forum strips your code formatting, making it very hard to read.

Re: Three Cool Things about D

[Rory McGuire via Digitalmars-d-announce]

Some of the template support code is still in the app.d file. And I mean to
rename some  of the functions etc. You can access all the output in
current_output.txt and the template used is index.jade.

github.com/rjmcguire/jaded
On 08 Jan 2016 04:45, "Jack Stouffer via Digitalmars-d-announce" <
digitalmars-d-announce@puremagic.com> wrote:

> On Friday, 8 January 2016 at 00:32:05 UTC, Rory McGuire wrote:
>
>> On Mon, Dec 28, 2015 at 5:24 PM, Rory McGuire 
>> wrote:
>>
>>
>>> On 27 Dec 2015 6:25 PM, "Andrei Alexandrescu via Digitalmars-d-announce"
>>> < digitalmars-d-announce@puremagic.com> wrote:
>>> >
>>> > On 12/27/15 1:27 AM, Rory McGuire via Digitalmars-d-announce > wrote:
>>> [snip]
>>> >> Vibe.d had a template engine called diet which is almost >> like
>>> Jade. It is also completed so you might prefer that as >> an example.
>>> >
>>> >
>>> > Either or both would be awesome to express with Pegged. -- > Andrei
>>> >
>>>
>>> I'm working on the output part now while it's the holidays. Will share
>>> once I've got my test template translating to html as a demo.
>>>
>>> A little teaser, this is the output of the app and runtime
>>
>
> Can you post all of the D code on github as well, seeing as the forum
> strips your code formatting, making it very hard to read.
>

Re: Three Cool Things about D

[Rory McGuire via Digitalmars-d-announce]

On 27 Dec 2015 6:25 PM, "Andrei Alexandrescu via Digitalmars-d-announce" <
digitalmars-d-announce@puremagic.com> wrote:
>
> On 12/27/15 1:27 AM, Rory McGuire via Digitalmars-d-announce wrote:
[snip]
>> Vibe.d had a template engine called diet which is almost like Jade. It
>> is also completed so you might prefer that as an example.
>
>
> Either or both would be awesome to express with Pegged. -- Andrei
>

I'm working on the output part now while it's the holidays. Will share once
I've got my test template translating to html as a demo.

Re: Three Cool Things about D

[Jacob Carlborg via Digitalmars-d-announce]

On 2015-12-27 17:23, Andrei Alexandrescu wrote:


That looks pretty cool! -- Andrei


It's based on Haml which is pretty well known as well.

--
/Jacob Carlborg

Re: Three Cool Things about D

[Andrei Alexandrescu via Digitalmars-d-announce]

On 12/26/15 4:17 PM, Daniel Kozak via Digitalmars-d-announce wrote:

https://strongloop.com/strongblog/compare-javascript-templates-jade-mustache-dust/

Andrei Alexandrescu via Digitalmars-d-announce
 napsal So, pro 26, 2015 v 8∶58 :

On 12/26/15 1:35 PM, Rory McGuire via Digitalmars-d-announce wrote:

I have a full Jade template parser in Pegged that I just need to
finish the d code gen part, could it be an interesting example?

Yes. How well-known is Jade? -- Andrei


That looks pretty cool! -- Andrei

Re: Three Cool Things about D

[Andrei Alexandrescu via Digitalmars-d-announce]

On 12/27/15 1:27 AM, Rory McGuire via Digitalmars-d-announce wrote:


On 26 Dec 2015 22:00, "Andrei Alexandrescu via Digitalmars-d-announce"
> wrote:
 >
 > On 12/26/15 1:35 PM, Rory McGuire via Digitalmars-d-announce wrote:
 >>
 >> I have a full Jade template parser in Pegged that I just need to finish
 >> the d code gen part, could it be an interesting example?
 >
 >
 > Yes. How well-known is Jade? -- Andrei

It is well known. I thought handlebars was used more but those github
numbers say different.

Vibe.d had a template engine called diet which is almost like Jade. It
is also completed so you might prefer that as an example.


Either or both would be awesome to express with Pegged. -- Andrei

Re: Three Cool Things about D

[Rory McGuire via Digitalmars-d-announce]

I have a full Jade template parser in Pegged that I just need to finish the
d code gen part, could it be an interesting example?
On 26 Dec 2015 20:10, "Andrei Alexandrescu via Digitalmars-d-announce" <
digitalmars-d-announce@puremagic.com> wrote:

> On 12/26/15 12:29 AM, Joakim wrote:
>
>>
>> 1. Saying "Anywho" to segue to a new topic seems to be a verbal tic of
>> Andrei's now.
>>
>> 2. It's claimed that scoped imports sped up D compilation: has this been
>> measured?  It would help if measurements were cited, as done for
>> compile-time regex performance at the end.
>>
>> 3. It's better that you show usage examples of a PEGGED grammar now, as
>> opposed to a previous talk that ended with the mixin slide, but I think
>> it'd be best if you actually worked a toy example out and showed the
>> generated D code, to really drive the point home.  Even better if it
>> wasn't something you could trivially write in D itself, like the
>> arithmetic example you gave.
>>
>
> Thanks for the feedback! I'll keep it in mind. -- Andrei
>

Re: Three Cool Things about D

[Andrei Alexandrescu via Digitalmars-d-announce]

On 12/26/15 12:29 AM, Joakim wrote:


1. Saying "Anywho" to segue to a new topic seems to be a verbal tic of
Andrei's now.

2. It's claimed that scoped imports sped up D compilation: has this been
measured?  It would help if measurements were cited, as done for
compile-time regex performance at the end.

3. It's better that you show usage examples of a PEGGED grammar now, as
opposed to a previous talk that ended with the mixin slide, but I think
it'd be best if you actually worked a toy example out and showed the
generated D code, to really drive the point home.  Even better if it
wasn't something you could trivially write in D itself, like the
arithmetic example you gave.


Thanks for the feedback! I'll keep it in mind. -- Andrei

Re: Three Cool Things about D

[Andrei Alexandrescu via Digitalmars-d-announce]

On 12/26/15 1:35 PM, Rory McGuire via Digitalmars-d-announce wrote:

I have a full Jade template parser in Pegged that I just need to finish
the d code gen part, could it be an interesting example?


Yes. How well-known is Jade? -- Andrei

Re: Three Cool Things about D

[Daniel Kozak via Digitalmars-d-announce]

https://strongloop.com/strongblog/compare-javascript-templates-jade-mustache-dust/

Andrei Alexandrescu via Digitalmars-d-announce 
 napsal So, pro 26, 2015 v 8∶58 
:

On 12/26/15 1:35 PM, Rory McGuire via Digitalmars-d-announce wrote:
I have a full Jade template parser in Pegged that I just need to 
finish

the d code gen part, could it be an interesting example?


Yes. How well-known is Jade? -- Andrei

Re: Three Cool Things about D

[Rory McGuire via Digitalmars-d-announce]

On 26 Dec 2015 22:00, "Andrei Alexandrescu via Digitalmars-d-announce" <
digitalmars-d-announce@puremagic.com> wrote:
>
> On 12/26/15 1:35 PM, Rory McGuire via Digitalmars-d-announce wrote:
>>
>> I have a full Jade template parser in Pegged that I just need to finish
>> the d code gen part, could it be an interesting example?
>
>
> Yes. How well-known is Jade? -- Andrei

It is well known. I thought handlebars was used more but those github
numbers say different.

Vibe.d had a template engine called diet which is almost like Jade. It is
also completed so you might prefer that as an example.

Re: Three Cool Things about D

[Joakim via Digitalmars-d-announce]

On Monday, 21 December 2015 at 17:28:51 UTC, Andrei Alexandrescu 
wrote:

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/

https://www.facebook.com/dlang.org/posts/1192267587453587

https://twitter.com/D_Programming/status/678989872367988741


Andrei


Just watched the whole video, even though I've seen a prior 
version of this talk.  It was different enough in the jokes and 
delivery that I still enjoyed it.  Some notes:


1. Saying "Anywho" to segue to a new topic seems to be a verbal 
tic of Andrei's now.


2. It's claimed that scoped imports sped up D compilation: has 
this been measured?  It would help if measurements were cited, as 
done for compile-time regex performance at the end.


3. It's better that you show usage examples of a PEGGED grammar 
now, as opposed to a previous talk that ended with the mixin 
slide, but I think it'd be best if you actually worked a toy 
example out and showed the generated D code, to really drive the 
point home.  Even better if it wasn't something you could 
trivially write in D itself, like the arithmetic example you gave.

Re: Three Cool Things about D

[deadalnix via Digitalmars-d-announce]

On Wednesday, 23 December 2015 at 01:07:57 UTC, Walter Bright 
wrote:

On 12/22/2015 10:29 AM, David Nadlinger wrote:
Not sure about how it arrives at the crazily unrolled loop, 
but no recursion in

sight anymore.


It's doing tail recursion optimization, which turns the 
recursion into a loop.

Then the loop is unrolled 8 times.


You can't to tail recursion in it's basic form because there is a 
multiplication at the end.

Re: Three Cool Things about D

[Andrei Alexandrescu via Digitalmars-d-announce]

On 12/23/2015 09:06 AM, Abdulhaq wrote:

A clip of the comedian that Andrei refers to can be seen here:

https://www.youtube.com/watch?v=uEY58fiSK8E


I love that bit! -- Andrei

Re: Three Cool Things about D

[Abdulhaq via Digitalmars-d-announce]

On Monday, 21 December 2015 at 17:28:51 UTC, Andrei Alexandrescu 
wrote:

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/

https://www.facebook.com/dlang.org/posts/1192267587453587

https://twitter.com/D_Programming/status/678989872367988741


Andrei


A clip of the comedian that Andrei refers to can be seen here:

https://www.youtube.com/watch?v=uEY58fiSK8E

Re: Three Cool Things about D

[Jakob Jenkov via Digitalmars-d-announce]

On Monday, 21 December 2015 at 17:28:51 UTC, Andrei Alexandrescu 
wrote:

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/

https://www.facebook.com/dlang.org/posts/1192267587453587

https://twitter.com/D_Programming/status/678989872367988741


Andrei



Interesting talk :-) Watched it while cooking.

Re: Three Cool Things about D

[David Nadlinger via Digitalmars-d-announce]

On Tuesday, 22 December 2015 at 19:07:55 UTC, Steven 
Schveighoffer wrote:

Am I missing some new feature here? What does the 'this' mean?


I have no idea, this must have been some sort of weird copy/paste 
or auto-correct mistake on my side. It's supposed to be "uint", 
as in Andrei's talk.


 — David

Re: Three Cool Things about D

[Ali Çehreli via Digitalmars-d-announce]

On 12/21/2015 09:28 AM, Andrei Alexandrescu wrote:

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/


https://www.facebook.com/dlang.org/posts/1192267587453587

https://twitter.com/D_Programming/status/678989872367988741


Andrei


Two unnecessary pedantic corrections:

- One of the earlier slides has "Voldermort" with an extra 'r'. It 
should be Voldemort.


- At the end of one of the optimization presentations you said that the 
behaviour of unsigned integer overflow and *underflow* are well defined. 
Although what you meant is clear and that I've been using "underflow" in 
the same meaning until very recently, I now know that underflow is a 
condition only for floating point types.


Copying from Wikipedia, "Arithmetic underflow can occur when the true 
result of a floating point operation is smaller in magnitude (that is, 
closer to zero) than the smallest value representable as a normal 
floating point number in the target datatype."


Ali

Re: Three Cool Things about D

[Walter Bright via Digitalmars-d-announce]

On 12/22/2015 10:29 AM, David Nadlinger wrote:

Not sure about how it arrives at the crazily unrolled loop, but no recursion in
sight anymore.


It's doing tail recursion optimization, which turns the recursion into a loop.
Then the loop is unrolled 8 times.

Re: Three Cool Things about D

[Steven Schveighoffer via Digitalmars-d-announce]

On 12/22/15 1:29 PM, David Nadlinger wrote:


---
ulong factorial(this n) {
 return n <= 1 ? 1 : n * factorial(n - 1);
}
---


Am I missing some new feature here? What does the 'this' mean?

-Steve

Re: Three Cool Things about D

[David Nadlinger via Digitalmars-d-announce]

On Wednesday, 23 December 2015 at 01:07:57 UTC, Walter Bright 
wrote:

On 12/22/2015 10:29 AM, David Nadlinger wrote:
Not sure about how it arrives at the crazily unrolled loop, 
but no recursion in

sight anymore.


It's doing tail recursion optimization, which turns the 
recursion into a loop.


The recursive call is not quite a tail call by itself, which is 
what Andrei pointed out using that example. But yes, that's what 
happens.



Then the loop is unrolled 8 times.


Sure thing. I was rather surprised to see that happen given that 
I only compiled with -O1, though, as it seems to be quite an 
aggressive optimization.


 — David

Re: Three Cool Things about D

[Nordlöw via Digitalmars-d-announce]

On Monday, 21 December 2015 at 17:28:51 UTC, Andrei Alexandrescu 
wrote:

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/


Great motivation as always! Thx!

Re: Three Cool Things about D

[David Nadlinger via Digitalmars-d-announce]

On Monday, 21 December 2015 at 17:28:51 UTC, Andrei Alexandrescu 
wrote:

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/


By the way, even though I wholeheartedly share your sentiment 
regarding those "functional" examples, I found it to be an 
interesting example for the power of modern optimizers that LDC 
manages to compile this


---
ulong factorial(this n) {
return n <= 1 ? 1 : n * factorial(n - 1);
}
---

to this:

---
__D4test9factorialFkZm:
mov eax, 1
cmp edi, 2
jb  LBB0_7
mov ecx, edi
lea edx, [rdi + 7]
add edi, -2
mov eax, 1
testdl, 7
je  LBB0_4
and edx, 7
neg edx
mov eax, 1
.align  4, 0x90
LBB0_3:
imulrax, rcx
dec rcx
inc edx
jne LBB0_3
LBB0_4:
cmp edi, 7
jb  LBB0_7
add rcx, -3
.align  4, 0x90
LBB0_6:
lea rdx, [rcx + 3]
imulrdx, rax
lea rax, [rcx + 2]
lea rsi, [rcx + 1]
imulrax, rsi
imulrax, rdx
lea rdx, [rcx - 1]
imulrdx, rcx
lea rsi, [rcx - 2]
imulrsi, rdx
imulrsi, rax
lea rax, [rcx - 3]
lea rdx, [rcx - 4]
imulrax, rdx
imulrax, rsi
add rcx, -8
lea edx, [rcx + 3]
cmp edx, 1
ja  LBB0_6
LBB0_7:
ret
---

Not sure about how it arrives at the crazily unrolled loop, but 
no recursion in sight anymore.


 — David

Three Cool Things about D

[Andrei Alexandrescu via Digitalmars-d-announce]

https://www.reddit.com/r/programming/comments/3xq2ul/codedive_2015_talk_three_cool_things_about_d/

https://www.facebook.com/dlang.org/posts/1192267587453587

https://twitter.com/D_Programming/status/678989872367988741


Andrei

Re: Talk: Three cool things about D

[Ali Çehreli]

Andrei Alexandrescu wrote:
 On 11/29/10 6:01 PM, Ali Çehreli wrote:
 Here is the announcement of the talk that I just sent out:
 [snip]

 Thanks, Ali. Let's see who's coming!

I am dragging some C++ (and C) people from where I work.

I am looking forward to meeting other D people too. Perhaps we will 
start a loosely once a month meeting, which should become The Bay Area 
D Interest Group or something like that. :)


 P.S. Will you be around by any chance?

Yes, Yes! I hope you will bring a pen to sign my Andrei Alexandrescu 
books... ;)


Ali

Talk: Three cool things about D

[Andrei Alexandrescu]

ACCU Silicon Valley invited me to give a talk on December 8, 7:00 at 
Symantec in Mountain View, CA.


Attendance is free and open. Hope to see some of you there!

http://www.facebook.com/event.php?eid=142541435798096


Andrei